Assessment of DNA binding mode, chemical nuclease activity ... · J. Indian Chem. Soc., Vol. 92,...

J. Indian Chem. Soc.,

Vol. 92, May 2015, pp. 627-629

Assessment of DNA binding mode, chemical nuclease activity and docking

studies of novel vanadyl complexes

Poonam R. Inamdara , A. S. Vickramb, T. B. Sridharanb and A. Sheela*a

aMaterials Chemistry Division, School of Advanced Sciences, VIT University, Vellore-632 014, Tamilnadu, India, E-mail : asheela@vit .ac.in

b Industrial Biotechnology Division, School of Biosciences and Technology, VIT University, Vellore-632 014, Tamilnadu, India

Abstract : Trans ition metal c omplexes have bee n ex pl oi ted exte ns ively to desig n ne w drugs due to

t hei r favorab le e lectro nic e nvironme nt and tunable geome try. These s peci f ic prope rt ies have proved

to be advant ageous for their ve rs at ile biolog ic al appl ic ations. He rein, we are foc us ing on s ynt he sis of

t wo este r base d ox ovanadium c omplexes , say, bis(butanoicac id-3-ox o-1, 1-

dimethylethyleste r)ox ovanadium(I V) (1) and bis (d ipropan-2-yl-propanedioate)ox ovanadium(IV) (2).

Complexes we re characte rize d by UV s pectroscopy, FTI R stud ies and Mass s pectroscopic analys is .

T he c omplexes are assesse d for c he mic al nucle ase act ivi ty agai nst p las mid pBR322 using gel

e lectrophoresis . Furthe r s upport towa rds bindi ng mode i s carrie d out by UV t i t ration using cal f

t hymus DNA. Doc king studies are done to compa re expe rime nta l and theore tical res ul ts .

Keywords : Oxovanadi um c omplexes, DNA b inding , nucle ase act ivity, doc king.


Vol. 92, May 2015, pp. 630-633

Bioactive Wollastonite synthesized by sol-gel combustion method by using

tartaric acid as a fuel for bone regenerative applications

R. Lakshmi and S. Sasikumar*

Centre for Excel lence in Nanomaterials, School of Advanced Sciences, VIT University,

Vellore-632 014, Tamilnadu, India, E-mail : [email protected]

Abstract : W ol lastonite (CaSiO3 ) has received its c onside ration in the f ie ld of ha rd t iss ue e nginee ring

due to it s good bioact ivi ty and bioc ompat ib ili ty. I n the prese nt study, Wollastonite was pre pared by

s ol -ge l c ombustion method by using tartaric ac id as a f uel f or the firs t t ime. Calc ium ni trate and

tetraet hyl orthos il icate we re take n as the s ource of c alc ium and si l icate . T he obta ine d produc t was

c haracte rised by F T-I R s pectrosc opy to identi fy the c ha racterist ic func tional groups prese nt in the

materi al and powde r X-Ray dif f rac tion tec hnique for the phase ide nti fic at ion. The SEM image reve als

t hat t he morphol ogy of W ol lastonite whic h was irreg ul ar in s hape and part ic les are ho mogeneous i n

s ize .

Keywords : Wol las toni te , bioc ompat ibity, X-ray di ff rac tion, scanni ng e lect ron mic roscopy.


Vol. 92, May 2015, pp. 634-636

CCB/NiO mixture as electrolyte material

Moumita Khutia, Girish M. Joshi*, Kalim Deshmukh and Mayank Panday

Polymer Nanocomposi te Laboratory, Material Physics Division, School of Advanced Sciences, VIT University, Vellore-632 014, Tamilnadu, India, E-mail : [email protected]

Abstract : The mixture of c onducting carbon blac k (CCB ) and nic kel ox ide (NiO) we re pre pared by

s ol id s olut ion method. The inte rfac ia l impac t ove r contro l l ed NiO was ide ntif ied by various too ls . The

e lectrica l analys is was pe rformed to c alc ulate the c apac itance, impe dance, and c onductance. T his

s ol id s olut ion exhib it an excelle nt capacitive propert y unde r wide range of f re que nc y. T he resul t als o

de monstrates that the e lectrica l paramete rs are not only affecting by c ont rol le d NiO but al so a n

exte rnal DC b ias pote ntia l. T his prope rty c an be use ful for the appl ication as one of the bes t

e lectrol yte mate rial.

Keywords : Conduc ting c arbon blac k, nic kel ox ide, sol id so lut ion.


Vol. 92, May 2015, pp. 637-639

Cobalt ferrite (CoFe2O4) nanoparticles for evaluation of antibacterial

activity

K. Venkatesana , R. Supriyab , M. P. Kavya Baib , S. Madeswarana , R. Vidyab and D. Rajan

Babu*a

aSchool of Advanced Sciences, VIT Uni versity, Vel lore-632 014, Tamilnadu, India

E-mail : [email protected]

bSchool of Biosciences and Technology, VIT University, Vellore-632 014, Tamilnadu, India

Abstract : Sp ine l fe rrite nanopart ic les have bee n invest i gated in recent ye ars, bec ause of its hig h

c he mical s tabi lity, s at uration mag netizat ion and c oe rc ivity. Mag ne tic nanopart ic les o f cobalt f e rri tes

we re s ynthes ize d by c ombust ion method. I ron ni trate (Fe(NO3 )3 .9 H2O) and c obal t nit rate

(Co(NO 3 )2 .6H2O) we re use d as an ox idize rs and g lyc i ne (C2 H5 NO2 ) was used as a fuel for this method.

By c hang ing the ox idant to fuel rat io, the adiabatic te mp erature of the flame and the final product

could be cont rol led. The propert ies of as prepared CoFe2O4 powder we re tho roug hly stud ied to

unders tand the structural and magnetic be havior (using powde r X-ray di ff rac tion, f iel d-emiss ion

s canning e lectron mic roscope with e lectron probe mic ro analysis and vibrati ng sample

magnetomete r). Cobalt fe rrite mag net ic nanopartic les are being used for the biomedica l appl ic at ions.

T he nanopart ic les were found to possess antibacteri al activi ty agains t E. co l i and i t s ho wed the

i nhibit ion at a minimum conce ntration of 50 mg/L.

Keywords : CoFe2O 4 , PXRD, FE-SEM with E PM A and VSM.


Vol. 92, May 2015, pp. 640-644

Co-EDTA NPs for the removal of chromium from waste water

Badal Kumar Mandal*, V. K. Venkatesh and H. A. Kiran Kumar

Trace Elements Speciation Research Laboratory, School of Advanced Sciences, VIT University, Vellore-632 014, Tamilnadu, India, E-mail : [email protected]

Abstract : Cobalt-ethyle ne diaminetetraacetic aci d nanopart icles (Co-E DT A NPs) are effect ive

adsorbent for the re moval of c hro mium (Cr) f rom waste wate r. I n this study, Co-EDTA NPs we re

s ynthes ized by boro hydride re duc ti on met hod, whic h are t he n c harac te rized and furt he r use d for the

re moval o f Cr. T he s ize s o f the na nopartic les were le ss than 100 nm. T he effects o f process

para mete rs s uc h as pH, v/ m rati o, contac t t ime and ini t ia l conce ntrati on on the exte nt of re moval of

c hromium were inves tig ated to get optimum re moval effic ie nc y duri ng ads orpt ion ex pe riment. The

ef fective re moval of Cr was obse rved in the re pet i tive t ri al s duri ng the re moval of Cr.

Keywords : Co-EDTA NPs, boro hydride re duct ion, re moval of c hromi um.


Vol. 92, May 2015, pp. 645-648

Conductivity, thermal and morphological properties of nano MgO

dispersed PVC-PEG polymer composite electrolytes

D. Ravindran*a and P. Vickramanb

aDepartment of Physics, Thiagarajar College of Engineering, Madurai-625 015, Tamilnadu


bDepartment of Physics, Gandhigram Rural University, Dindigul-624 302, Tamilnadu, India

Abstract : Nano-size d MgO part ic les we re s ynthes ized throug h s o l-gel method and dis pe rse d as f il le r

i n PVC-P EG matrix with l ithium pe rc hlorate (L iClO4 ) as dopant sa lt. The conte nt of MgO partic le s

i n the e lect rol yte was varie d t o study its i nf luence on the ionic c onduct iv ity of the me mb ranes. The

e lectrol yte f i lms we re s ubjected to XRD, AC impe dance analysis . The analys is re veals the st ro ng

i nf luence of MgO part ic les on t he c onduct iv it y prof ile . The conduct ivity of MgO dope d e lectro lyte

me mbra nes ex hi bi ts two max ima one occ urri ng at 1 wt% and othe r at 6 wt% of fi lle r. The f i lm with

compos iti on (PVC-P EG-PC-LiClO4 -MgO) : (19-15-50-10-6) exhib it s hig he r conducti vi ty of 6 .034 × 10 –

6 S/c m at room te mpe rature. Te n t ime s e nhance me nt i n the c onductivi ty value was obse rve d. The

t he rmal stabi l ity of t he membra ne was est i mate d throug h TGA anal ys is . T he SEM analysis s hows the

poros ity and connectivi ty of the pores was dete rmine d by the MgO conte nt.

Keywords : Polyme r e lect rolyte , ionic conducti vi ty, SEM analysis , the rmal analysis .


Vol. 92, May 2015, pp. 649-651

Development of a tricomponent composite graphene oxide-chitosan-

hydroxy-apatite for bone tissue engineering

Y. Dominic Ravi chandran*a , T. Villaretb and R. Rajesha

aOrganic Chemistry Division, School of Advanced Sciences, VIT University, Vellore-632 014, Tamilnadu, India, E-mail : [email protected]

bÉcole Nationale Supérieure de Chimie, Clermont-Ferrand, France

Abstract : The hydrox yapat it e ( HAP ) was i s ol ate d from t he bones of the Catla fis h (Cat la ca tla ) by

t he rmal calc inat ions at 400 ºC, 600 ºC, 800 ºC and 900 ºC. Amo ng t he m the opt i mum te mpe rature was

found to be 800 º C. T he g raphite (GP) was conve rted in to graphene ox ide (GO) and t ric ompone nt

compos ite of GO-c hitosan-HAP was pre pare d. T he tricompone nt c ompos ite was cha racte ri zed by

t he rmog ravimetric (TG) and di f fe re nt ial thermog ravimetric (DTG) analysis , F ourie r T rans forme d

I nfra red s pectroscopy (FTI R) and X-ray d iff raction (XRD). The compres si ve and te ns ile st re ngth of

t he compos ite was found to be 9 .77 ± 1 .47 MPa and 0 .650 ± 0. 276 MPa res pecti vel y. The c ompress ive

s tre ngth ex hi bi te d by the t ric ompone nt composi te met the require me nt for bone tiss ue e ngi nee ring

(3–10 MPa).

Keywords : Hydroxyapati te , c hitos an, g raphe ne ox ide, composite .


Vol. 92, May 2015, pp. 652-655

Development of electrospun Ti incorporated polyvinyl pyrrollidone

nanofiber and its characterizations

Krishnaveni Venugopal and Sangeetha Dharmalingam*

Department of Mechanical Engineering, Anna University, Guindy, Chennai-600 025, India


Abstract : I n rece nt years, e lectros pinning has garne re d a lot of inte rest in the production of ul tra

f ine continuous polyme r f ibe rs of varyi ng d iame te rs. T he mai n g oal of this study was to pre pare a

nove l b ipolar me mb rane usi ng me ta l inc orporate d hydrophi l ic po lyme r nanof iber mat as a n

i nte rmediate s o as to invest igate the ef fects of the hydrophil ic inte rface on wate r sp lit ti ng eff ic ie nc y.

T he tec hnique use d for the nanof ibe r preparation is by e le ctros pinni ng method and the polyme r used

for the nanof ibe r mat i s pol yv inyl pyrrol lidone (P VP, a c onduct ing polyme r). The novelt y in the wor k

i s incorpo ration of me tal ( Ti) into the nanof ibe r matrix duri ng the e lectrosp inning process itse l f fo r

t he e nhance me nt of wate r s pl i tt ing c apacity. The reby, t he bonding of the me ta l with the nanofibe r

polyme r matrix was stro nge r than obt ai ned throug h any othe r process. T his st rength is di rectly

foc used towa rds the better ef f ic ie nc y in wate r t reatme nt appl ic at ions. The fabricated nanof ibe r mat

was c haracte rized using FTI R-AT R, SEM-EDAX and XRD tec hniques.

Keywords : Electrosp inning , polyvinyl pyrrolli done, Ti metal i nc orporate d nanof ibe r, sc anning e lectro n

microsc ope.


Vol. 92, May 2015, pp. 656-659

Electrical, mechanical and magnetic properties of organic-inorganic hybrid

single crystal (ethylene diammoniumtetracholrocobaltate(II) chloride)

K. Shakila and S. Kalainathan*

Centre for Crystal Growth, VIT University, Vellore-632 014, Tamilnadu, India


Abstract : E lectric al, mec hanica l and mag net ica l propert ies of ethyle ne

diammoniumtetrac hlorocobaltate(I I ) c hloride (EDACCo) s ing le c rystal prepare d by sl ow e vaporat ion

method have bee n i nve stig ate d. T he resist i vity me as ure me nt were carrie d out by us i ng four probe

method and it use d to expla in the e lectri ca l and e lectronic propert ies of the c rysta l. Band g ap i s a ls o

calculate d fro m resist ivit y meas ure me nt. The variation of mag ne tic mo me nt of the g rown c rys tal s

under an applie d static mag netic f ie ld was stud ied by Vibrational Sample Mag netomete r (VSM). The

room tempe rature mag net izat ion res ul ts re vealed a fe rrom ag net ic be havi our for t he EDACCo crystal.

T he mechanica l prope rt ies o f c rystal we re evaluate d by mec hanic al testing whic h re veals ce rtain

mechanic al characte rist ics. T he Vic ke rs hardness number (H v) was found to inc rease s wi th the

i nc re ase in load and Meye r’ s index number ‘n’ was calc ulated from H v s hows mate rial fal l s in sof t

materi al c ategory. Us ing W ooste r’ s e mpirica l re lati on, the e last ic st i ffnes s constant (C1 1 ) has bee n

calculate d from Vic ke rs hardness values.

Keywords : Room te mpe rature fe rromag net is m, mec hani ca l prope rties, spintronics, e lectrica l prope rt ies.


Vol. 92, May 2015, pp. 660-663

Fabrication and characterizations of PCDTBT : PC71BM bulk

heterojunction solar cells using air brush coating method

Kannappan Santhakumar*a , P. Indujaa , M. Shivashankarb and G. Chandramohanc

aEnvironmental and Analytical Chemistry Divisi on, VIT University, Vellore-632 014,

Tamilnadu, India, E-mail : [email protected]. in

bPharmaceutical Chemistry Division, VIT Uni versity, Vellore-632 014, Tamilnadu, India

cDepartment of Chemistry, A.V.V.M. Sri Pushpam College, Poondi-613 503, Thanjavur,

Tamilnadu, India

Abstract : Org anic s olar ce lls have at tracted a sig nif icant amount of atte nt ion due to the need to

deve lop an i nex pe ns ive c le an and s us ta inable re ne wable ene rgy s ource. We re port on the fabricatio n

of poly [N-9 ′ ′′ ′′ ′′ ′ -hepta-dec anyl-2 ,7-carbazole-al t-5 ,5-(4 ′′′′ , 7 ′′′′ -di-2-thie nyl-2 ′′′′ ,1 ′′′′ ,3 ′′′′ -be nzothiad iazo le )]/ [6, 6] -

phe nyl-C71-butyric ac id methyl este r ble nd active laye r us ing ai rbrus h spray c oat ing me thod i n

mixe d s ol ve nts. The s urface mo rpholog y of the active laye rs deposite d with dif fe re nt para mete rs was

examine d using Atomic F orce Mic rosc opy. T he c urre nt de ns ity-voltage (J-V) cha rac te ristics of

photovol taic ce l ls were meas ure d under the i l lumination of si mulate d sol ar l ig ht with 100 mW/ cm2

(AM 1 .5G) by an Orie l 1000 W s ol ar simulator. T he po we r c onve rsion ef ficie ncy of the s olar cel l i s

more than 5% .

Keywords : Org anic so lar cel l, spray coating , AFM, PCBM.


Vol. 92, May 2015, pp. 664-666

Facile green synthesis of gold nanoparticles and its cytotoxic activity

against MCF-7 cell line

R. Geetha, T. Ashokkumar and G. Singaravelu*

Nanoscience Division, Department of Zoology, Thiruvalluvar University, Vellore-632 115, Tamilnadu, India, E-mail : [email protected]

Abstract : The faç ade of nanoscie nce is the c reat ion and uti lization of mate ria ls at the nanomete r

s cale, has bee n a g reat inf l ue nce on d iagnost ics and the rapeut ics. The not ion of gree n c he mistry

principle for t he s ynthes is of noble meta l nanopart ic les is to conque r the prob le ms wi th the c he mic al

s ynthes is and hyb rid technologies. Prese nt f indings de mons t rate the biol og ic al s ynthesis of g old

nanopart ic les usi ng the aque ous rhi zome extract of Alpinia gal anga . The re action was c omplete d i n

t wo minutes. The sizes o f ne wly synthesi ze d g old nanopa rt icles are ra nging fro m 9 to 36 nm. The

ne wly formed gold nanopa rtic les were f ound to be stab le . UV-Vis spectrum reveals the SP R λλλλ ma x at

538 nm. X-Ray diff ract i on me as ure me nt c learly re ve als that the ne wly forme d gold nanopart ic les are

c rystall ine i n nature. It is inte rest ing that the ne wly synt he si zed g old nanopartic les corroborate d

cytotoxic ef fect in MCF-7 cel l li nes.

Keywords : Alpinia ga langa , MCF-7 cell s , MTT assay, ce ll cytotox ic ity.


Vol. 92, May 2015, pp. 667-670

Flammability studies of multicomponent coir pith/nylon fabric/epoxy

hybrid composites

R. Narendar and K. Priya Dasan*

Material Chemistry Division, VIT University, Vellore-632 014, Tamilnadu, India


Abstract : F lammabi l ity of polyme r composites is represe nts how c ompos i te mate rials act unde r f ire

condition. Coir p ith was t re ated wi th s odium hydroxi de and fo llowed by fi ve di ffe re nt c he mic al

t reatments and used for f ille r in e pox y matrix. Hand layup tec hni que was adopted for preparation of

coir pi th base d epoxy composites. Che mic ally t re ate d co ir pith c omposi tes s hows highe r ig nition ti me

and lowe r rate of burning c ompare to untre ate d c oir pi th c omposi tes . Che mic al t re atme nt re moves

noncel lulosic c ompone nt i n c oi r p ith and i mproves f i l le r matrix adhe sion and i t s hows hig he r ig nit ion

t ime and l owe r rate of burning. Hybri di zat ion with nyl on fabric furthe r imp roves the flammabil i ty

prope rties of composites.

Keywords : Polyme r c ompos ites, coir pi th, nylon fabric , epoxy c omposi tes, flammabi lity.


Vol. 92, May 2015, pp. 671-674

Functionalized Fe3O4 nanoparticles for the removal and remediation of

CrVI metal ions from synthetic solutions

A. Sivaramana , P. Sathiyanathana , D. Manjula Dhevia , A. Anand Prabu*a, b and Heecheul

Kimb

aMaterials Chemistry Division, School of Advanced Sciences, VIT University, Vellore-632

014, Tamilnadu, India, E-mail : [email protected]

bDepartment of Architectural Engineering, Kyung Hee Uni versity, 1732, Deogyeong-daero,

Giheung-gu, Yongin-si, Gyeonggi-do 446-701, South Korea, E-mail : [email protected]

Abstract : I n the prese nt study, po lye thyle ne g lyc ol c oated iron- oxide be ads we re s uccessful ly used to

adsorb CrV I f ro m s ynthet ic s olutions. Stud ies on ads orpt ion we re c arrie d out by varyi ng para mete rs

s uc h as adsorbe nt dos age, pH, and c ontact t ime. 0 .05 g of Fe3O4 /PEG ads orbe nt s howe d hig hes t

adsorpt ion capacity of 38 mg/g of adsorbe nt at pH 6 unde r 90 min of s haking time for 1000 ppm

s ol ut ion. Among the c orrelat ion c oeff icie nt values obta ine d using three di ffe re nt mode ls ( intra-

part ic le dif fus ion model, pse udo- f irst orde r and kinet ics), the pse udo-sec ond orde r model proves to

be t he best fit wi th R2 values of 0 . 9998 .

Keywords : Fe3O 4 nanopart ic les, po lye thyle ne g lyc ol , eff lue nt t re at me nt, metal ion ads orbe nts.


Vol. 92, May 2015, pp. 675-678

Green synthesis of silica nanoparticles and its corrosion resistance behavior

on mild steel

U. Vijayalakshmi*, Vineet Vaibhav, M. Chellappa and U. Anjaneyulu

Materials Chemistry Division, School of Advanced Sciences, VIT University, Vellore-632 014, Tamilnadu, India, E-mail : [email protected], [email protected]. in

Abstract : I n t he past fe w years, seve ral studies have be en made in the preparat ion of sil ica f ro m

natural res ources ( rice hus k) and i ts effec ts on puri f ic ation and c haracte ri zation s tudies. T he was te

materi als ge ne rall y have bee n dis posed off without any e nvironme ntal pol luti on but indee d t he waste

materi als i tse lf are recog nize d as a s ource of s il ic a. In the prese nt i nvest igati on, rice hus k i s

s ubjected to si nte ring at 900 ºC for 7 h. The sinte re d samp le was then treate d with 1 M NaOH to for m

s odium si l ic ate . Final ly, the gel was take n and re acted with 6 M H2 SO4 t o precipitate s il ica. The

prec ip itate d samples we re c ha racteri zed by XRD and t he mo rphol ogy was studie d by AFM analysis .

T he s ilic a c oatings re prese nt a pro mising approach for the deve lopme nt of a c orros ion protec tive

s urface because of i ts c hemic al ine rtne ss, barrie r prope rt ies. Si l ica coat ings we re deve lope d on mild

s teel s ubstrates by dip coat i ng and its e lectroc he mic al be havior has bee n e valuated by the Tafel

extrapolat ion method and EI S analysis us ing 3 .5% sodium c hloride sol ut ion as e lectro lytes. F rom the

res ult s , i t was found that the sil ica c oatings produce d by dip coati ngs has excelle nt corros ion

resis tance be havior than t he unc oated.

Keywords : Si lic a, rice hus k as h, corrosion, po lari zation study.


Vol. 92, May 2015, pp. 679-682

Green synthesis of silver nanoparticles for catalytic reduction of 4-

nitrophenol to 4-aminophenol

S. Shanmuga Priya, Syamasrit Das, Saraschandra Naraginti and A. Sivakumar*

Chemistry Division, School of Advanced Sciences, VIT University, Vellore-632 014, Tamilnadu, India, E-mail : [email protected]

Abstract : T he prese nt study deal s wit h simple and rap id method for s ynthes is of s i lver nanopart ic les

using Areca ca techu root extract as re ducing and stabi lizing age nt. St able s ilve r nanopart ic les

(Ag NPs) we re formed on treatme nt of an aque ous si lve r nitrate (Ag NO3 ) s olution with the root

extract. T he synthesize d nanopart ic les we re c haracteri ze d wel l by UV-Vis ib le spectrosc opy, X-ra y

dif f ract ion (XRD) and F ourie r- transform infrared spectro scopy (FTI R). XRD conf irms face-cente re d

c ub ic phase and the diff ract ion pea ks c an be at tributed to (1 1 1 ), (2 0 0 ), (2 2 2 ) and (3 1 1) planes

for these nanopart icles. T he synthesize d Ag NPs we re als o found to func ti on as ef fic ie nt g ree n catalyst

i n the reduc tion of anthropogenic pol l utant 4 -ni trophenol (4-NP) to 4-aminophe nol (4 -AP ) by sod ium

boro hydride, which was appare nt f rom the progressi ve co lour c hange of brig ht yel lo w to co lourles s

s ol ut ion, afte r the addit ion of sil ver nanopart ic les.

Keywords : Nanopart ic les, eco-frie ndl y, 4 -nitrophe nol, gree n catalyst, Areca ca techu .


Vol. 92, May 2015, pp. 683-686

Influence of porous structure on the ionic conductivity of nano ZnO

incorporated PVC-PEG polymer nanocomposite electrolytes

D. Ravindran*a and P. Vickramanb

aDepartment of Physics, Thiagarajar College of Engineering, Madurai-625 015, Tamilnadu, India, E-mail : ravi4xyz@gmail .com

bDepartment of Physics, Gandhigram Rural University, Dindigul-624 302, Tamilnadu, India

Abstract : Polyme r electrol yte membrane c omp rising poly(v inyl c hloride) P VC and poly(ethyle ne

g lyc ol) PEG b le nd as matri x, lithium pe r c hloride (LiClO 4 ) as dopant sal t and propyle ne carbonate

(PC) as plast ic ize r was prepared by solut ion casting method. T he nanosize d ZnO part ic les we re

s ynthes ized throug h nove l sol id state mil l ing and ca lc ination of zinc acetate and c i t ric acid powders.

T he wt% of synthes ized partic les we re s yste matic al ly varied and inc orporate d as f il le r in P VC-P EG

polyme r matrix to study it s inf luence on t he c onductivi ty of polyme r electrol ytes. The f ilms we re

s ubjected to XRD and AC impedance analysis i n the f reque ncy range 50–100 KHz at room

tempe rature. T he analysis s hows stro ng inf lue nce of fi lle r partic les on the ionic c onduct ivity of the

me mbra nes. The c onductivi ty profi le features t wo maxima occurring at 0. 5 wt% and at 4 wt% of

f ille r. The 4 wt% fil le r adde d me mbra ne ex hi bi ts 10 times e nhanceme nt in the conduct ivity value tha n

t he f i lle r f ree electrol yte membra ne. The e nhanceme nt i n the c onduct ivity was examined throug h

s urface morphol ogical (SEM) studies.

Keywords : Polyme r e lect rolytes, phase separation, ionic c onduct ivi ty, ZnO f i lle r, SEM analysis .


Vol. 92, May 2015, pp. 687-690

Influence of various coating techniques on the corrosion resistive behavior

in Ringer’s solution

U. Vijayalakshmi* and S. Rajeswari

Materials Chemistry Division, School of Advanced Sciences, VIT University, Vellore-632 014, Tamilnadu, India, E-mail : [email protected]. in, [email protected]

Abstract : Sol -gel s i l ic a g lass has a sig nif icant ef fect on the mic rostruc tural and mec hanic al

deve lopme nt of the implant mate rials . Sol -gel method is a ve rs atile method to deve lop diffe re nt types

of ox ide c oatings on a large, c urve d s ubst rates with hig h homoge nei ty and l ow s inte ring

tempe ratures. I n orde r to e nhance the c orrosion resi stance be havior various types of oxi de based,

hybrid c oat ings have bee n s tudie d. The re are a numbe r of inte rest ing stud ies i nclud ing the b iologic al

f unc tions; biomi ne ral i s at ion wit h excel le nt b ioact ive abil it y and mechanica l st rength ma kes i t

s ui table for bi omedic al appl ic at ions. The a im of the work is to e nhance the corros ion resist ive

be havi or of the coat i ngs using d iffe re nt strateg ies s uc h as EP D met hod, spin c oating and b iomi met ic

coating . Sil ic a g lass is pre pared at a molar rat io of H2 O/TEOS (Tetra Ethyl Ortho S ilicate) and the

obta ine d powde r was cha rac te rized by F T-I R, XRD and SEM analysis . It was found that the s ol -ge l

s pin coat ings have s hown excel le nt the rmal stab il i ty, ox idation contro l and enha nce d corros ion

resis tance on me ta l s ubstrates. The abi l ity to passivate t he metal s ubst rates duri ng coat ing has

pronounce d effect on c orros ion res istance. T he corrosion resis tance be havior of the c oat ings was

dete rmine d by (1) ope n-circ uit potential ve rs us t ime of expos ure, (2 ) e lectroc hemic al impe dance

s pectroscopy, (3 ) cyclic polarizati on i n Ringe r’s so lution.

Keywords : I mpedance, po larization, sp in c oating , e lectrophore tic .


Vol. 92, May 2015, pp. 691-695

Investigation of electrical properties of solid polymer electrolyte based on

bio-degradable poly(vinyl pyrrolidone) polymer

N. Vijaya*a , L. Shageelaa , L. Kasthuria , F. Kingslin Mary Genovaa and S.

Selvasekarapandianb

aDepartment of Physics, S.F.R. College for Women, Sivakasi-626 123, Tamilnadu, India


bMaterials Research Centre, Coimbatore-641 045, Tamilnadu, India

Abstract : Solid polyme r e lectro lytes c onsis ting of poly(vinyl pyrrolidone) (PVP) as host polyme r and

ammonium c hloride (NH4 Cl) as doping s al t have bee n prepare d by sol ut ion c ast i ng tec hnique us ing

dimethyl s ul phox ide as s ol ve nt and c haracte rized f or e lect rica l prope rties. The XRD anal ysis s hows

t he incre ase in amo rphous nature and the FT-I R analys is confirms the c omplexat ion behaviour of the

polyme r e lectro lytes. The AC impe dance analysis i nd ic ate s the inc re ase in ionic conduct iv ity of the

e lectrol yte as the c once ntration of NH4 Cl inc reases. The max imum c onduct ivity has bee n found to be

1 . 495 × 10– 5 S c m– 1 at 303 K for 80 mol% PVP : 20 mol% NH4 Cl. T he te mpe rature depe nde nt

conducti vi ty obeys Arrhenius l aw. The die lectric prope rt ie s have bee n d isc ussed.

Keywords : Polyme r e lect rolyte , XRD, FTI R, ionic conduct iv it y.


Vol. 92, May 2015, pp. 696-698

Investigations on synthesis, structural and magnetocrystalline anisotropy

constant of cobalt ferrite nanoparticles

V. Harikrishnan, D. Rajan Babu and R. Ezhil Vizhi*

School of Advanced Sciences, VIT University, Vellore-632 014, Tamilnadu, India

E-mail : [email protected], [email protected]

Abstract : Cobalt fe rri te nanopartic les with diff ere nt c rystal l ite s izes have bee n synthesize d us ing the

coprec ip itation method. I n this wo rk, the s truc ture and phase purity was analyzed by usi ng X-Ray

dif f ract ion ( XRD). T he compound analys is was done us ing the Sc anning Electro n Mic rosc ope (SEM)

with Ene rg y Dispers ive X- ray analysis (EDAX). T he mag net ic prope rties we re s tudie d us ing the

vi brating sample mag netomete r (VSM). The mag net ic c rys tal line anisotropy constant of CoFe2O4 was

calculate d us i ng Law of Approac h to Saturat ion (L AS) model . This plays a major ro le i n the

hype rthe rmi a studies.

Keywords : X-Ray dif f ract ion, SEM, EDAX, VSM.


Vol. 92, May 2015, pp. 699-701

In vitro development of magnesium ammonium phosphate hexahydrate

crystal by single diffusion method and study of its antimicrobial activity

Reshma Rajanb , R. Vidya*a , S. Saranyaa , V. Deepalakshmia and N. Arunai Nambi Rajb

aSchool of Bioscience and Technology, VIT University, Vellore-632 014, Tamilnadu, India


bSchool of Advanced Sciences, VIT Uni versity, Vellore-632 014, Tamilnadu, India

Abstract : Struvite or magnesium ammonium phosphate hexahydrate (M APH) is one type uri na ry

s tone that are whic h occ ur due to the urina ry trac t infect ion. These stones are mainly c aus ed due to

t he bacte ria whic h s pl its ure a. These stone deve lop rapidly to form “Staghorn ca lculi” that c ause s

urolog ica l dis orde r whic h is ve ry painful. I n this method, sodium metas i lic ate (SMS) act as a

s ubstrate for de velopme nt of st ruvite crystal in v i t ro . The c ryst al is de velope d us ing s ing le d iffusio n

technique whic h c onsis t of inne r and oute r re actant. Afte r the g rowth of st ruvite c rys tals , the y we re

dis s ol ve d in various s olve nts li ke DMSO, DMF and ethano l (at 50 ppm, 100 ppm, 200 ppm, 300 ppm).

T he disso lved compounds unde rwent the ant imic rob ial act iv ity wi th Esc herichia co l i , Acetobacter spp

and Pse udomonas spp .

Keywords : St ruvite , Staghorn c alc ul i, s ingle dif fus ion method, antimic rob ial ac tivi ty.


Vol. 92, May 2015, pp. 702-704

Mechanical studies, surface analysis, luminescence studies of an organic

NLO material : 5-Nitroindole

M. Nirosha and S. Kalainathan*

Center for Crystal Growth, VIT University, Vellore-632 014, Tamilnadu, India


Abstract : S ingle c rystal of 5 -nitro indole was g rown by slow c ooling s ol ut i on g rowth technique.

Vic ke r’s mic ro hardness test has c arried out in orde r to unde rstand the mec hanic a l propert ies of the

g ro wn c rystal. T he Meye r’s index number s hows the mate ria l belong to soft categ ory. The c rys tal

s urface has analyzed by che mical etc hing and atomic force mic ros copy (AFM). The etc hing study

re veals the g rowth patte rn and d islocations prese nt in the grown c rysta l. T he ampl itude paramete rs

me as ure d f rom AFM studies he lps to analyze t he s urface topography of the g rown c rystal . The

e miss ion spectrum has rec orded betwee n 540–720 nm. The broad e mission band appe ared in the

reg ion 552–567 nm s ho ws the bl ue e mission in t he crystal.

Keywords : Crystal g rowth, mec hanic al stud ies, surface analysis , luminesce nce.


Vol. 92, May 2015, pp. 705-707

Mixed ligand based copper(II) complex and its antimicrobial activity

R. Suhasinia , Poonam R. Inamdarb and A. Sheela*b

aDepartment of Chemi stry, Auxilium College, Vellore-632 006, Tamilnadu, India

bMaterials Chemistry Division, School of Advanced Sciences, VIT University, Vellore-632 014, Tamilnadu, India, E-mail : asheela@vit .ac.in

Abstract : T ransi tion metal complexes of mixe d l igand syste ms have played a pi votal ro le in the

deve lopme nt of inorganic c he mistry. Met al c hel ates have bee n pre fe rre d for the rape ut ic app lic ations

ove r inorg anic sal ts due t o thei r tunab le coordination ge ometries and thei r ef fic ie nc y to bring about

desirab le effect a t minimum dos age le vels1 . Mixed ligand complexes of c urc umin wit h bipyridine,

phe nanthrol ine and othe r anc il lary l ig ands have bee n pro ved as effic ie nt antic ance r age nts2 . I n the

c urre nt study, the s ynthe sis of Cu I I complex of mixe d l igands of diethylmalonate and sa lic yl al de hyde,

possessing simi lar bindi ng modes as c urc umin and s al icylalde hyde is desc ribe d. The s ynthes ized

complex [Cu(sal )(de m)].2 H2O is c ha racte ri zed by UV-Visible , FT-I R and mas s s pectra l tec hniques to

asce rtain the struc ture of complex. Thes e types of complexes are expected to possess pote nti al

antimic robial and antic ancer appl icati ons.

Keywords : Mixed lig and complexes, ββββ -diketones, ant ibacte rial activi ty.


Vol. 92, May 2015, pp. 708-712

NiTiO3/ZnO heterojunction composites catalyzed degradation of reactive

dyes in presence of oxidants under UV-Visible radiation

Santhanam Sivakumara , Ayyasamy Selvarajb , Venkadachalam Chandrasekaran and

Anaipalayam Kandasamy Ramasamy*a

aDepartment of Chemi stry, Periyar University, Salem-636 011, Tamilnadu, India


bDepartment of Chemi stry, Hindustan Institute of Technology, Coimbatore, Tamilnadu, India

Abstract : I lme nite NiTiO 3 and Wurtzi te ZnO have been synthes i zed by s ol -gel route . A se ries of

NiTiO3 / ZnO hete rojunc tion composite photocata lys ts with a diffe re nt we ig ht rat io o f Ni TiO 3 (3 wt% ,

5 wt% , 7 wt% , 9 wt% and 11 wt% ) we re pre pared by the coupl ing of NiTiO3 and ZnO with the he lp

of oxalic acid as a l inke r. T he obta ine d NiTiO3 / ZnO heterojunct ion c ompos ites o f c rys ta ll ine phase

and opt ic al prope rties we re invest igated by using X-ray di ff racti on (XRD) and UV-Vis d iffuse d

ref lectance s pectroscopy ( DRS). The photoc atalytic acti vity of NiTiO3 /ZnO hete rojunct ion composi te s

was c arri ed out on the deg radat ion of re act ive dye s uc h as reac tive b lue 4 (RB 4) unde r UV-Vi sible

l ig ht irradiati on. 9 wt% NiTiO3 /ZnO hete rojunct ion c omposites de mons trate hig he r photoc at alyt ic

acti vi ty than that of othe r hete roj unct ion c omposi tes and pare nt photocatal yst li ke ZnO and Ni TiO 3

at pH 5 . T he addition of s ubs tant ial amount of e lectron acceptors s uc h as H2O 2 and (NH4 ) 2S2O 8

i nc re ases the rate of degradat ion of RB 4 on 9 wt% NiTiO3 / ZnO hete rojuncti on c ompos ite . F urther,

t he electron acceptors (oxidants) use d for deg radat ion of the othe r four di ffe re nt struct ure d re active

dyes in the prese nce NiT iO3 / ZnO he te rojunction composi tes. The exte nt of mine ral ization on these

org anic re act ive dyes during photoc atalytic degradation was es timated from COD analysis .

NiTiO3 / ZnO hete roj unct ion photoc atalys t was also found to have good photostabil it y in the prese nce

of e lectron acce ptors.

Keywords : NiT iO3 / ZnO, ox i dants, photoc atal yt ic effic ie nc y, UV-Visi ble l ig ht.


Vol. 92, May 2015, pp. 713-716

Optical properties of L-alanine passivated CdS nanoparticles

S. S. Talwatkara, A. L. Sunatkarib , A. B. Gambhirec , A. B. Naikd, G. B. Hardee and G. G.

Muley* f

aDepartment of Physics, Acharya Marathe College, Chembur, Mumbai-400 071, India

bDepartment of Physics, Siddharth College of ASC, Fort, Mumbai-400 023, India

cDepartment of Chemistry, Anand College, Pathardi, Ahamednagar-414 102, Maharashtra

dDepartment of Chemi cal Technology, Sant Gadge Baba Amravati University, Amravati -444

602, Maharashtra, India

eDepartment of Physics, Shri R. R. Lahoti Science Col lege, Morshi, Amravati -444 905, Maharashtra, India

fDepartment of Physics, Sant Gadge Baba Amravati University, Amravati -444 602, Maharashtra, India, E-mail : [email protected]

Abstract : CdS nanopart ic les passivate d with amino acid L-alani ne havi ng s pheri ca l hie ra rc hic al

morphology were s ynthesi zed by low te mpe rat ure wet c he mic al method. The s ynthes ized

nanopart ic les we re c haracteri zed by UV-Visible s pectroscopy to kno w the variat ion of band gaps wit h

conce ntrat ion of s urf ace modif yi ng age nts. I ndee d, b lue s hift i n band g ap i s observed and i t inc rease s

with i nc re asing conce ntration of s urface modifying age nts. Powder XRD, SEM and TEM analysis we re

carrie d out for the confirmat ion of format ion of nanopartic les. Powde r XRD study was done to

confirm the c rystal s t ructure and De bye-Sc herre r formula was use d to f ind out the ave rage partic le

s ize f rom the broade ni ng of XRD pea ks. T he ave rage part ic le size is found to less than 5 nm. F T-I R

s pectroscopy was pe rformed to know the functional groups of the g rown nanopartic les. From the

obse rve d pe a ks, it was conf irmed that the CdS nanopartic les we re c appe d by L-a lanine.

P hotoluminescence study was pe rforme d on the g rown CdS nanopart ic les.

Keywords : Amino acid, CdS nanopartic les, powde r XRD, photo luminesce nce, part ic le size.


Vol. 92, May 2015, pp. 717-720

Photocatalytic study of cubic and mixed phase of nano cadmium sulphide

Sk Ershadul Haque and A. Sheela*

Materials Chemistry Division, Centre for Nanomaterials, School of Advanced Sciences, VIT University, Vellore-632 014, Tamilnadu, India, E-mail : asheela@vit .ac.in

Abstract : Cadmi um s ulphide in nano form is pre pared by sol id state method us ing c admium c hloride

and s odi um s ulphi de at two diffe re nt g rinding pe riods, say , 1/2 h and 3 h designated as (CdS-a) and

(CdS- b) res pect ively. T he as-pre pared produc ts are c harac te rized by powde r X-ray diff ract io n

(XRD), UV-Vis s pectroscopy (UV-Vis) , Sc anning e lectron mic rosc ope (SEM) and Trans missio n

e lectron mic roscopy (TEM). CdS-a, ex ist in c ubic form and with i nc reas ing g rindi ng pe riod, t he re i s a

phase t ra nsformation f rom c ubic phase (CdS-a) to mix ed (c ubic+hex agonal) phase (CdS-b). The

compounds are s ubjec ted t o photoc atalyt ic dec olorizati on study with methyl ora nge (MO) and

rhodamine B (RB) unde r UV and s un lig ht. Based on t he s t udy, i t has bee n obse rve d that unde r bot h

UV and s unl ig ht, mixed phase CdS-b s hows g reate r photoc atalyt ic ef fic ie nc y agai nst MO than RB.

Keywords : Nano CdS, phase t ransformation, photoc at al yst , met hyl orange.


Vol. 92, May 2015, pp. 721-723

Preparation and catalytic activity of mesoporous Al-SBA-16 solid acid

catalysts

M. S. M. Kamila , K. Manikandana , S. P. Elangovanb and K. K. Cheralathan*a

aMaterials Chemistry Division, School of Advanced Sciences, VIT University, Vellore-632


bDepartment of Chemi cal System Engineering, The University of Tokyo, Tokyo, Japan

Abstract : Mesoporous a luminos ilic ates with S i/Al ratio = 50 have been synthesize d from SB A-16 by

post s ynthet ic aluminum inc orporat ion into the s il ic a f ra me wo rk. The aluminum s ources used for Al

i nc orporat ion were aluminum is oproproxide and s odium aluminate . Characte rization by low angle

XRD and N2 ads orption has bee n c arried out for the confirmati on of 3 D c ubic pore s tructure of

mes oporo us alumi nosil icates. T he obta ine d mes oporous aluminos il icates and H-ZSM-5 ze o li tes we re

used as cata lys ts for l iquid phase esteri fic at ion of be nzyl a lcohol wit h hex anoic acid. T he liqui d-phase

esteri fic ation re acti on is used as a tool to probe the inte rde pe ndence of mes oporos it y, ac idi ty and

method of aluminium inc orporat ion. The c atalyt ic activ ity res ult s s uggest t hat apart f rom aci dit y,

mes oporosi ty i s require d for cata lyzing the re action.

Keywords : Al-SB A-16 , mes oporos ity, be nzyl hexanoate , este ri fic ation.


Vol. 92, May 2015, pp. 724-728

Preparation and characterization of new donor-acceptor conjugated

polymer derived from quinoline and carbazole

Anjali Upadhyay and S. Karpagam*

Organic Chemistry Division, School of Advanced Science, VIT University, Vellore-362 014, Tamilnadu, India, E-mail : [email protected]

Abstract : Quinoline and c arbazole s ubs titute d o lig o phe nyle ne-vi nyle ne (QC-OP V) was s ynthes ized

f rom 2 ,6-dimethyl quinol ine and 3 ,6-bis formyl-9-a llylcarbazole throug h Wit tig reacti on. The

s ynthes ized conjug ated oligome r was c ha racteri zed by FT-I R and NM R and GP C c hro matography.

T he ol ig ome r s hows excellent s olub il i ty in commo n organic s olve nts s uch as c hlorof orm,

dic hlorome thane, ethyl acet ate , te trahydrofuran and di methyl formamide. T he weig ht ave rage

molec ular weight of t he ol igome r i s 3455 . UV abs orpti on (UV-Vis) and photol umi nesce nce ( PL )

e miss ion wave lengths of (Q C-OP V) have a sig nif ic ant b lue s hift (410 and 450 nm) due to good

e lectronic deloca l ization of the conj ugated seg me nts of the corresponding ol igome r. T he res ul t

i ndic ates that QC-OPV has excel le nt optoelectronic prope rties.

Keywords : Donor-acceptor o lig ome r, quinoline , carbazole , Witt ig route.


Vol. 92, May 2015, pp. 729-731

Role of surfactants and solvent parameters in the mechanical and barrier

performance of chlorobutyl rubber nanocomposites

A. Saritha*a ,b and Kuruvilla Josephb

aAmrita Vishwavidyapeetham University, Amritapuri, Kollam-690 525, Kerala, India

b Indian Institute of Space Science and Technology, Valiyamala, Trivandrum, Kerala, India


Abstract : A s pecial c lass o f buty l rubbe r, name ly c hlorobuty l rubbe r whic h exhibi t s s upe rior air

i mpermeabi l ity is the e las tome r of c hoice for the inne r tubes and li ne rs of tires. Dif fere nt variet ies of

laye red s i lic ates we re mixed wit h c hlorobuty l rubbe r and nanoc omposi tes we re pre pared using

s ol ve nts wi th varyi ng cohes ive e nergy de nsity and the effect o f so lve nt -c lay and s olve nt-rubbe r

para mete rs in dete rmining the propert ies of the nanoc omposi tes we re stud ie d. Diffe re nt

c haracte rizat ion tec hni ques li ke XRD and TEM we re used to c ha rac te rize the aforementi oned

compos ites. The di ffe re nt org ano c lay moiet ies (c loisite 1 0A, 15A) ut il i ze d in this wo rk we re c hose n

to i nvest igate the effects of the amine s urfactant structure on the dis pe rsion of c lay part ic les i n

c hlorobutyl rubbe r matrix . T he uniform d is pe rs ions of na noc lay obtained in the c hl orobutyl rubbe r

mat rix wi l l definite ly e nable the mate ri al to ex hibi t bet ter wo rking time or breakthro ug h t imes and

wo ul d make the mate ria l s ui tab le for c he mic al protective c lothing . Moreove r the inte rc alate d and

exfoli ate d geometry of the nanoc omposi tes is a s ure ind ication of excel le nt mec hanic al propert ies o f

t hese mate ria ls whic h pave way for the uti l ization of the se mate ria ls in automoti ve, indus trial and

ae rospace app lic ati ons.

Keywords : Chlorobutyl rubber, laye red si licates, c hemical protective c lothing , worki ng ti me.


Vol. 92, May 2015, pp. 732-735

Silver plasmons sensitized photocatalytic activity of bismuth ferrite

(BiFeO3) nanoparticles

Sakar Mohana , Bharathkumar Sivakumara , Jayamani Mohana , Balakumar

Subramanian*a and Sellamuthu N. Jaisankarb

aNational Centre for Nanoscience and Nanotechnology, University of Madras, Chennai-600

025, India, E-mail : [email protected]

bPolymer Division, Central Leather Research Institute (CSIR), Adyar, Chennai-600 020, India

Abstract : Si lve r (Ag) plas mons se nsit ize d b is muth fe rrit e (BiFeO 3 -BFO) hybrid nanopart ic les we re

s ynthes ized by s ol -gel combined c he mic al re duction method. The synt hesize d Ag : BFO nano- hybrids

was stud ie d for t heir phot oc atalyt ic ab ili ty to degrade org anic pol l ut ant s uc h as me thyle ne blue

under the s unl ight expos ure. The format ion of Ag and BFO phase was c onf irmed by the X-ra y

dif f ract ion s tudies. The high res olution tra ns miss ion e lectron mic rog rap hs s ho we d that the Ag NP s

we re wel l depos ite d on the s urf ace of BFO partic les. UV-Visible abs orpt ion s tudies re vealed that the

s ensit ization of B FO with nanosc ale Ag has sig ni f icantly enhance d its v is ible l ig ht abs orption and

s ubseque nt photoc atalyt ic activi ties. T he res ult s reporte d he re s uggest that the s urface plas mo n

res onance ( SP R), whic h is manifested on the nanoscale si l ve r, e nhanced the quantum yie ld of photo-

gene rate d e lectron- t ransfe r processes by boost ing up the charge separat ion i n BFO and by pro moting

t he s hutt le e lectrons to the interf ace of c atalyst-dye and the reby effective ly degraded the dye

molec ules .

Keywords : M ult ife rro ics, photoc at al ys t, s urface plas mon resonance, plas monic se ns iti zat i on.


Vol. 92, May 2015, pp. 736-738

Sodium calcium silicate/chitosan composites for hard tissue applications

Aviral Srivastava, Sivasankar Koppala, Madhusudhana Rao Nasina and Sasikumar

Swamiappan*



Abstract : I n this study, we have prepare d bi oac ti ve s odium calc ium si licate (SCS) po wde rs f rom

s odium carbo nate , calc ium ni trate , tetraet hyl orthos ilic ate (TEOS) by s o l-gel c ombus tion method

using c it ric acid as a f ue l . Phase formation of the synthesi zed SCS powde rs was c haracte ri ze d by

po wde r X-ray di ff rac tion ( XRD). Composites were pre pared by add ing di ffe re nt rat i os of s odium

calci um s i lic ate powde r to c hitos an and the ir in v i t ro b ioact iv ity was analyzed by immers i ng the

compos ites in s imulated body f luid (SBF) s olution. Res ults s how t hat more c hi tos an conta in c ompos i te

s hows g re ate r bioact iv ity whe n compare d t o the c ompos i tes contains less er c hitos an. Es timation of

calci um i on c once ntrat ion i n the SBF s olut ion indicates that the ca lc ium c ontent prese nt in the

compos ite inf lue nces bioact iv it y.

Keywords : Sol -gel combust i on, sodi um c alc ium sil icate , chitos an, bioac tivity.


Vol. 92, May 2015, pp. 739-742

Spin filter effect in iron oxide nanocrystal arrays

I. C. Lekshmi*a , b, C. Nobileb , R. Buonsantib , P. D. Cozzolib and G. Marucciob

aDepartment of Chemistry, CMR Institute of Technology, 132 AECS layout, Bangalore-560 037, India, E-mail : [email protected]

bNNL CNR-Istituto Nanoscienze, Via Per Arnesano, 73100 Lecce, Italy

cDepartment of Mathematics and Physics “Ennio de Giorgi”, University of Salento, Via Per Arnesano, 73100 Lecce, Italy

Abstract : I nteg rat ing nanoc rys ta ls (NCs ) into mag net ic tunnel s t ructures is o f conside rable inte rest

due to expectat ion of novel prope rties f rom the ir sp in se lec tive t ra nsport and single e lectro n features .

Supers tructures by col l oi dal NCs havi ng trans lat ional and orie ntat ional orde r and inte rest ing

col lec tive mag net ic prope rt ies c an be prepared by s olut ion casting throug h se nsit ive i nte rpartic le and

part ic le- s ubstrate inte ract ions. I n this work, we disc us s the study on mag netic fie ld induce d asse mbly

of mono-dis pe rsed iron ox ide NCs to obtain s pin fi lte r effect ac ross the s upe rlatt ice array, whe n

s andwic he d bet wee n go ld e lectrode s. T he de pos ition of mi xed phase Fe3O4@ γγγγ -Fe2O3 NCs on SiO2 / Au

s urface procee ds throug h s low s ol vent e vaporat ion and are studie d for c ontro l led inte rpart ic le

s pacing . For s pecific NC c once ntrat ion, the orde ring de pends on the s ubs trate c he mis try and the

l igands passivating NC s urface, whic h affects the c once ntrati on of c l us ter nucle i forme d. I n prese nce

of a mag ne tic f ie ld, the tunne l s t ructure ex hi bi ts e nhance d posi ti ve tunnel mag net oresistance at lo w

tempe ratures, whic h could be relate d to their fe rromag netis m and the attempts by e lect rons to

pe rc olate NC s upe rl att ice wi th prese rve d spin. A s ign re ve rs al for mag net ores is tance is exhib ited by

t he ve rtic al tunne l junc ti ons on ra is ing the t empe rature.

Keywords : Mag ne tic nanocrystals , se lf- ass embly, iron ox ide, spin-de pe ndent t rans port.


Vol. 92, May 2015, pp. 743-746

Structural and magnetic properties of pulsed electrodeposited Fe-Ag alloy

T. A. Revathya , K. Dhanapala , V. Narayananb and A. Stephen*a

aDepartment of Nuclear Physics, University of Madras, Guindy Campus, Chennai-600 025, India, E-mail : [email protected]

bDepartment of Inorganic Chemistry, University of Madras, Guindy Campus, Chennai -600 025

Abstract : Nanostruct ure d al loy forme d by magne tic and nonmag net ic compone nts p lay a s ig ni fic ant

ro le in se nsor appl icati ons due to t heir uni que magnet ic prope rties. An a lloy of the the rmal ly

i mmiscible const itue nts iron and sil ve r was de posite d at three di ffe re nt curre nt dens it ies by pulse d

e lectrodepos ition method from a t wo e lectrode si ng le bath s ys te m c onta ining ferri c ni trate , s ilve r

nit rate and s odium pe rc hlorate . The s urface morp hol ogy of the as deposite d a lloy was invest igated

using fie l d e mission sc anning e lectro n mic rosc opy (FESEM) analysis whi le the a ll oy struc ture was

examine d by X-ray di ff rac tion analys is (XRD). XRD analysis s ho wed that a l loys exhibit fcc st ructure.

FESEM analys is re veals that in the de posi t, the sphe ric al nanosize d partic les g ro w to form de ndrites.

T he X-ray photoe lectron s pectroscopy stud ies i ndic ate the pre se nce of metal lic s il ve r and iron.

F urthermore, the mag netic prope rt ies of s amples we re c haracte ri zed on a v ibrat ing s ample

magnetomete r (VSM) whic h unvei l s that the Fe -Ag al loy de posits we re fe rro mag net ic in nature.

Keywords : Pulse d e lectrodepos i tion, Fe-Ag nano mate rial , fe rro mag netic alloy.


Vol. 92, May 2015, pp. 747-754

Structural, morphological and optical characterisation of electrodeposited

ZnSe thin films

A. Ayeshamariam*a, M. Kashifb , D. Saravanakumarc , S. Muthurajad , M. Jayachandrane

and M. Bououdinaf , g

aDepartment of Physics, Khadir Mohideen College, Adirampattinam-614 701, Tamilnadu, India, E-mail : aismma786@gmail .com

bNano Biochip Research Group, Institute of Nano Electronic Engineering (INEE), Universiti, Malaysia Perlis (UniMAP), 01000 Kangar, Perlis, Malaysia

cDepartment of Physics, Devanga Arts College, Aruppukkottai, Virudhunagar District -626 101,

Tamilnadu, India

dMEMS and Sensors Division, SENSE, Vel lore Institute of Technology, Vellore-632 014,

Tamilnadu, India

eElectro Chemical Material Science Division, (CSIR) Central Electro Chemical Research Inst itute, Karaikudi-630 003, Tamilnadu, India

fNanotechnology Centre, University of Bahrain, PO Box 32038, Kingdom of Bahrain

gDepartment of Physics, College of Sci ence, University of Bahrain, PO Box 32038, Kingdom of Bahrain

Abstract : T he bas ic a im of this st udy is to prese nt t he ro om te mpe rature synthesis of ZnSe thin fil m

by varying doping conce ntration of se le ni um oxi de on ITO plate us i ng a rel at ive ly simple and low c os t

t radit ional e lectrodeposi t ion tec hnique. X-Ray di f f rac t ion c onf irms the format ion of s ing le c ubic

ZnSe phase with a preferre d orie ntation along (111) direct ion with an average value of the c rys ta ll i te

s ize around 37 nm. Optical s tudies re veal a t ra ns mittance above 80% for lo wer SeO 2 conce ntration (<

3% ) the n drop up to 60% for hig he r c once ntrat ion (> 5%) with an e nerg y bandg ap around 2 .75 eV.

P hotoluminescence anal ys is s hows the prese nce of mainly 2 bands, narrow PL band ce nte red at 487

nm and broad photoemiss ion band cente red at 531 nm. Scanning e lectron mic roscopy obse rvations

re veal t he format ion of dense nanostruc ture d fil ms.

Keywords : ITO plate , ZnSe, e lectrodeposi tion, photolumi nescence, ene rg y bandg ap.


Vol. 92, May 2015, pp. 755-759

Structural, optical, morphological and organic vapours sensing properties

of SnO2 nanostructures

S. Muthuraja*a , L. Balakrishnanb , K. Govardhana, S. Mohana Roopanc and S. Manoj

Kumarana

aMEMS & Sensors Division, School of Electronics Engineering, VIT Universi ty, Vell ore-632


bMaterials Physics Division, School of Advanced Sciences, VIT University, Vellore-632 014, Tamilnadu, India

cOrganic Chemistry Division, School of Advanced Sciences, VIT University, Vellore-632 014, Tamilnadu, India

Abstract : Tin ox ide is a wide band g ap n- type semic onduc tor and has the c apab il i ty to detect various

reducing gases and org anic vapours. The se ns iti vi ty towa rds di ffe re nt gases and org anic vapours in

hig h te mpe rature environme nt is a lre ady re porte d. The prese nt wo rk i s foc used on the de velopme nt

of s oft c he mical route de rive d SnO2 nanos tructures to de tect org anic vapours . The ethanol se nsing

prope rties o f the de rived nanos tructures of SnO2 was analyze d. X-Ray dif f ract ion, UV-Vis

s pectroscopy, scanni ng e lectron mi crosc ope and e ne rgy dis pe rsive s pectrosc ope c ha rac te rizations

have bee n perf ormed to c onf irm the SnO2 nanostruc ture format ion. The opti mum te mperature fo r

s ens or ope rat ion towards 50 ppm of ethanol has a ls o bee n found.

Keywords : SnO2 , nanos tructure, soft che mical s ynthes is , ethanol se nsi ng .


Vol. 92, May 2015, pp. 760-762

Studies on synthesis and coordination chemistry of catechol based

phosphine oxides

E. Veerashekhar Gouda , B. B. Pavankumara , B. Hari Prasad Reddya , Kari

Vijayakrishnaa , Akella Sivaramakrishna*a, K. N. Sabharwalb and C. V. S. Brahmananda

Raob

aDepartment of Chemi stry, School of Advanced Sciences, VIT University, Vellore-632 014, Tamilnadu, India, E-mail : [email protected]

bChemistry Group, Indira Gandhi Centre for Atomi c Research, Kalpakkam-603 102, Tamilnadu, India

Abstract : Two dif fe re nt types of catechol based phos phi ne ox ides are prepared by the c onde ns atio n

re action of phe nyld ic hloro phosphine ox ide and the c orresponding catec hol de rivat ives in the

pre se nce of t riethylamine. These c ompounds are used for the pre parat ion of their corres ponding LaI I I

and ThI V complexes. All these products were characte rize d by spectrosc op ic data.

Keywords : Phosphine ox ide, catec hol, stabi lity and c oord ination be havior.


Vol. 92, May 2015, pp. 763-765

Studies on the growth, spectral, optical and mechanical properties of

organic single crystal : 2-[2-(4-Diethylamino-phenyl)-vinyl]-1-ethyl-

pyridiniumiodide monohydrate

K. Senthil, S. Kalainathan* and A. Ruban Kumar

Centre for Crystal Growth, School of Advanced Sciences, VIT University, Vellore-632 014, Tamilnadu, India, E-mail : [email protected]

Abstract : Single c rystal of 2 - [2-(4-diet hylamino-phenyl)- vi nyl] -1-ethyl- pyrid iniumiodide

mono hydrate (E DE ASI) has bee n s ynthes ized by the Knoe ve nagel c onde nsation re action me thod. The

s ynthes ized c ompound was puri fie d by s uccessive rec rysta llizati on. Good qual ity si ng le c rystals we re

obta ine d by the sl ow evaporat ion me thod. The single c rystal X- ray d iff ract ion analys is has bee n

carrie d out to dete rmine cell para mete rs. It was found t hat the ti tle mate ria l c rysta lli ze in the

t ric linic c rystal sys te m with s pace g roup P. Crystall i ne nature of the g ro wn c rys tal was ide nti fie d

f rom po wde r X-ray dif f ract ion patte rn. T he FT-I R s pectrum was recorded to ide nt ify the various

f unc tional g roups prese nt in the c ompound. T he proton NMR s pectrum has bee n rec orde d to ide nt i fy

t he prese nce of part ic ular hydroge n nucle i prese nt in the synt hesised materi al. T he opt ica l

t ransparency ra nge and c ut off wavele ng th of the gro wn crystal have been ide nti f ie d by UV-Vis-NI R

s pectroscopy stud ies. The mec hanica l prope rties of the g ro wn c rys tal we re meas ure d by Vic ke r’ s

mic ro hard ne ss method.

Keywords : Org anic compounds, s ing le c rystal g rowth, s low evaporati on, opt ic al mate rial.


Vol. 92, May 2015, pp. 766-768

Study on the dielectric behaviour of magnesium ammonium phosphate

hexahydrate pellets in room temperature

Reshma Rajana , N. Arunai Nambi Raj*a , S. Madeswaranb and D. Rajan Babub

aDivision of Photonics and Medical Physics, School of Advanced Sciences, VIT University, Vellore-632 014, Tamilnadu, India, E-mail : [email protected]

bDivision of Crystal Growth and Crystallography, School of Advanced Sciences, VIT University, Vellore-632 014, Tamilnadu, India

Abstract : The struvi te or M agnesium Ammo ni um Phos phate Hex ahydrate (M AP H) crysta ls are one

among the most promine nt and hig hly occ urring urina ry st one c rystals . These stones are mainly

occ urring i n human due to urina ry trac t infections. The struvite c rys ta ls we re grown i n v i t ro by

s ingle di f fus ion gel g rowth tec hni que using si lic a gel as a medium. T he grown crys ta ls we re g ive n fo r

XRD characte rization to confirm i ts c rystal l ine nature. T he g ro wn c rysta ls we re made into pel lets

and unde rwe nt die lectric study. The die lectri c prope rty of pellet s at room te mpe rat ure with variatio n

i n f re que ncy was s tudied. The res ul t s hows a notice able variation in the die lectric be haviour of the

materi al as f re que nc y varies.

Keywords : MAP H, struvi te , die lectric prope rty, urina ry s tone.


Vol. 92, May 2015, pp. 769-772

Synthesis and antibacterial studies of novel hydrazide based thorium(IV)

and lanthanum(III) complexes

Pothini Sumana , Sannapaneni Janardana , Mayur Bagadb, Kari Vijayakrishnaa, Zaved

Ahmed Khanb , Ramamoorthy Sivab and Akella Sivaramakrishna*a

aDepartment of Chemi stry, School of Advanced Sciences, VIT University, Vellore-632 014, Tamilnadu, India, E-mail : [email protected]

bSchool of Bio-Sciences and Technology, VIT University, Vellore-632 014, Tamilnadu, India

Abstract : Novel complexes of thorium(I V) and lanthanum(I I I ) have bee n s ynthes i zed by the ir act io n

with triphe nylphos phinimi no-N g roup ligands, namel y (i) N -

( t riphe nylphos phoranyl ide ne)acet ohydrazide and (ii ) N-

( t riphe nylphos phoranyl ide ne)nic ot inohydra zide. The pre se nt work desc ribes the stud ies on the

coord inat ion be haviour of a ll these complexes and the y have bee n c haracte ri ze d by the FT-I R, 1H, 1 3C

and 3 1P NMR spectrosc opic tec hnique s. F urthe r these complexes we re teste d ag ainst ant ibacte ri a l

acti vi ties.

Keywords : Thorium(IV) c omplexes, lant hanum(I I I ) compl exes, hydrazide l igand, antibacte ri al activi ty.


Vol. 92, May 2015, pp. 773-776

Synthesis and characterization of diopside by sol-gel combustion method

by using L-alanine as a fuel for biomedical applications

Rajan Choudhary, Rishabh Raj and Sasikumar Swamiappan*

Materials Chemistry Division, School of Advanced Sciences, VIT University Vellore -632 014, Tamilnadu, India, E-mail : [email protected]

Abstract : Bioce ramic ca lc ium si l ic ates have e vol ved as a pote ntial biomate ria l for art ific i al bone and

de nta l root implants due t o i ts excelle nt b ioact ivity and i mprove d mec hanic al st re ngth he nce in the

pre se nt wo rk we ai me d to c onve rt the bio-waste into a useful b iomate ria l. I n this study diopside

(CaMgSi2O6 ) has bee n s uccess ful ly prepare d by so l-gel combust ion method by us ing L-al anine as a

f uel , nit rate ions as an ox idise r and egg s hell (c hic ke n) as a c a lc ium s ource. Optimi zat ion of

calci nati on te mpe rat ure re s ul ted in a wel l c ryst al line d iopside powde rs with hig h phase puri ty.

Synthesize d powde rs we re c haracte rized by powde r-XRD for phase i de nt if ic at ion, FT-I R spectros copy

for functional g roup analysis and scanning e lectron mic roscope for the meas ure ment of partic le size

and s urface morpholog y.

Keywords : Bioce ramic, bi oact i vi ty, diopside, bio- waste , powde r-XRD.


Vol. 92, May 2015, pp. 777-779

Synthesis and characterization of nano lead oxide gas sensors

Sk. Khadeer Pasha and K. Chidambaram*

School of Advanced Sciences, Material Physics Division, VIT University, Vellore-632 014,

Tamilnadu, India, E-mail : [email protected], [email protected]

Abstract : Lead ox ide s ample was pre pare d at low te mpe rature by t he s ol vo-t he rmal method. The le ad

ox ide c haracte rize d by X-Ray dif f ract ion (XRD), t rans miss ion e lectro n s pectroscopy (TEM) we re

e mploye d to ide nt ify the structural phases and part ic le size . X-Ray d iff racti on and tra ns miss ion

e lectron mic ros copic stud ies conf irms the nanocrys ta ll ine nanopart ic les. T his le ad ox ide we re used to

fabric ate volat ile org anic gas se ns ors. T he ef fect of t em pe rature and trans ient c haracteris tics fo r

various VOCs (butanol, ethanol, propanol and me thanol) are re porte d.

Keywords : Nanopart ic le , lead ox ide, characte rizati on, gas res ponse.


Vol. 92, May 2015, pp. 780-783

Synthesis and characterization of new heteroleptic derivatives of

titanium(IV) derived from 2-hydroxy-4-methoxy-benzophenone : A new

precursors for the synthesis of nano sized titania

Blassan Samuela , Madhvesh Pathak*a and Kap Jin Kimb

aMaterials Chemistry Division, School of Advanced Sciences, VIT University, Vellore-632 014, Tamilnadu, India, E-mail : [email protected]. in

bDepartment of Advanced Materials Engineering for Information and Electronics, College of

Engineering, Kyung Hee University, 1732, Deogyeong-daero, Giheung-gu, Yongin-si, Gyeonggi-do 446-701, South Korea, E-mail : [email protected]

Abstract : A fe w ne w ti tanium(I V) c omplexes have bee n s ynthesi zed by the re action among prec urs o r

(Bp)2T i(OP r i)2 wi th d iff ere nt al kox yal kanols and phe nols/ subs titute d phe nols i n 1 : 1 : 1 molar rat ios

i n boil ing to lue ne as mono nucle ar hete ro le pt ic t i tanium c omplexes of the type [ (Bp)2Ti(L1OR)( L2X)]

(3a-c) ( where B p = 2-hydrox y-4- methox y-be nzophenone, L1 = -O-C H2 -C H2 - ; R = CH3 , C2 H5 ; L2 =

phe nol , X = H or OC H3 ). T he ne wl y pre pared complexe s we re c haracte rize d by various physic o-

c he mical techniques s uc h as e le me ntal analysis , mass, UV, F TI R and NMR (1 H and 1 3C). The mass

s pectra of t he ne wly s ynthes ize d de ri vat i ves indic ate thei r mono me ric nature. Base d on s pectral

s tudies cis hex acoord inated geometry aro und titanium(IV ) has bee n propose d. By e mploying s ol -gel

t echniques t o all the molec ules, nano s i zed t i tania was produce d at 600 ºC. Powde r XRD anal ys is

confirmed the formati on of a mixe d phase (anatase and rut ile).

Keywords : Hete ro leptic , t itanium c omplexes , be nzophenone, nano t itania.


Vol. 92, May 2015, pp. 784-786

Synthesis and characterization of novel poly(o-anisidine)/graphene

multifunctional nanocomposite

D. Sangamithiraia , S. Dhanavela , V. Narayananb and A. Stephen*a

aDepartment of Nuclear Physics, University of Madras, Guindy Campus, Chennai-600 025, India, E-mail : [email protected]

bDepartment of Inorganic Chemistry, University of Madras, Guindy Campus, Chennai -600 025

Abstract : P ol y(o -anis idi ne)/ graphene (POA/G) nanocompos ites we re synthesize d by c he mic al

ox idative polyme rizat ion of o- anis idi ne with ammo ni um pe rs ulfate as an ox i dant in the prese nce of

g raphe ne nanopart ic les. T he polyme r nanoc ompos i te was characte rize d by us ing FTI R, Rama n and

XRD tec hniques. T he structure was c haracte rize d by XRD. FTI R spectrum c onfi rms that the polyme r

nanocomposi te is in c onduct ing e me raldine s alt phas e. Raman s pectrum re veals the pre sence of

f unc tional g roups that account for the formati on of nanoc ompos ite.

Keywords : Poly(o -anis id ine), graphene, nanoc omposi te , spectrosc opy.


Vol. 92, May 2015, pp. 787-791

Synthesis and characterization of platinacyclosulfides derived from

platinum based heterobimetallic carbonyl clusters

Chinduluri Sravania , Sadhana Venkatesha , H. Madhesana , Kari Vijayakrishnaa ,

Cherukuri Aswanikumarb and Akella Sivaramakrishna*a

aChemistry Division, School of Advanced Sciences, VIT University, Vellore-632 014,

Tamilnadu, India, E-mail : [email protected]

bSchool of Informat ion Technology, VIT University, Vellore-632 014, Tamilnadu, India

Abstract : T he prese nt pape r desc ribes the synthesis and re act ivity of plat inum base d trinucle a r

carbonyl c l uste rs o f the type L2Pt Ru2 (CO) 8 whe re L2 = 1 ,3 -bis(diphe nylphos phino)propane (dppp)

and 1, 2-bis (diphe nylphos phi no)butane (dppe) . Re action of t hese t rinuc le ar c l us ters with e le me ntal

s ul fur y ie lded the unex pected formation of p latinac ycl os ul f ides. The produc ts we re is olate d and

ide nti f ied as p latinac yclodis ul f ide and plat inac yclotetras ul f ide by analytic al and spectrosc op ic

t echniques.

Keywords : Hete robi meta llic carbonyl c luste rs, re activ i ty, e le me ntal s ul fur.


Vol. 92, May 2015, pp. 792-795

Synthesis and characterization of spinel LiMn2O4 nanoparticles by urea

assisted combustion synthesis

D. Narsimulua , B. Nageswara Raoa , M. Venkateswarlub and N. Satyanarayana*a

aDepartment of Physics, Pondicherry University, Pondicherry-605 014, India


bR & D, Amararaja Bat teries, Tirupati-517 501, Andhra Pradesh, India

Abstract : Spi nel LiMn2O 4 has bee n wi del y use d as c athode materi al in li thi um ion batteries bec ause

of i ts hig h e nerg y de ns i ty, low c ost, hig h abundance, e nvironmental f rie ndl i ness etc . T he applic at ion

of LiM n2O4 in hig h power app lic ati ons i s limite d by its low rate c apabil ity. I n orde r to ove rcome this

proble m, atte mpts have made through the reduct ion of partic le size f rom mi c ro to nano sc ale . The

nanosize mate rials not only inc rease the e lectrode-electro lyte s urface contact are a but a lso s ho rte ns

t he dif fus ion lengths of both e lectrons and l ithium ions. Synthesis process plays a ke y ro le in

deve loping various nanostruc ture d mate ria ls . I n t he prese nt work, nanocrystal l ine LiMn2O 4 partic le s

we re pre pared by ure a assis ted comb ustion process using c it ric acid and ure a as fuels . The rmal

be havi or, phase analysis , st ructural c o- ord inat ion, s urface morphology, s pecific s urface area and

electrica l conduct ivity of pre pare d L iM n2O4 part ic les we re stud ied t hroug h TG/ DTA, XRD, FTI R,

SEM, BET-s urface are a analys is and impe dance spectroscopy meas ure me nts, respect ively1 , 2 .

Keywords : Rec hargeable l i thi um batte ries, cathode mate rial, LiM n2O4 , urea as sis ted combusti on synthesis .


Vol. 92, May 2015, pp. 796-799

Synthesis and characterization of ZnO and Al2O3 nanoparticles and their

application in the chromium remediation studies

Badal Kumar Mandal* and H. A. Kiran Kumar

Trace Elements Speciation Research Laboratory, School of Advanced Sciences, VIT

University, Vellore-632 014, Tamilnadu, India, E-mail : [email protected]

Abstract : P rese nt work desc ribes the s ynthes is of zinc ox ide (ZnO) and alumi num oxide ( Al2O 3 )

nanopart ic les (NPs) by si mple c he mic al reduc tion method . The s ynthes ize d NPs we re c haracte rize d

using XRD, AFM and SEM. Both ZnO and Al2O3 NPs we re used in the re me diation stud ies to re move

c hromium( VI ) f rom aque ous solut ion. Vari ous process parameters s uc h as pH, v/ m rati o, contact t ime,

i ni tial c once nt rat i on of ads orbate we re e valuate d to achie ve opt imum re moval ef f ic ie nc y of

c hromium. T he obt ai ned res ul ts s howe d that both the NPs acte d as pote ntial ads orbe nts i n the

re moval of c hro mium from aqueous so lution; maximum re moval was see n at pH 5 . T he c ontact t i me

require d to ac hie ve the equi li brium was 60 mi n for ZnO and 95 min for Al2O3 . Both the NPs

de monstrate d good adsorpt ion c apacity agains t the c once ntration of adsorbate thri ce. Optimizat ion of

dif fe re nt process paramete rs le d to 100% re moval effic ienc y with low amount of ads orbent (150 mg of

ZnO NPs and 200 mg of Al2O3 NPs). Re us abi l ity of the s ynthes i zed NPs was tested whic h s uggeste d

t he m to be promis ing ads orbe nts for the re moval o f toxic heavy metals .

Keywords : Zinc ox ide NPs, alumina NPs, ads orbe nt, re me di at ion, c hromium( VI ).


Vol. 92, May 2015, pp. 800-803

Synthesis of magnetic nanoparticles and their effect on growth of carbon

nanotubes

C. Santhosha , M. Saranyaa , R. Ramachandrana, N. Pradeepb , V. Umab , Pratap Kolluc and

A. Nirmala Grace*a

aCentre for Nanotechnology Research, VIT University, Vellore-632 014, Tamilnadu, India


bMount Carmel College, Bangalore-560 052, India

cDST-INSPIRE Faculty, Department of Metallurgical Engineering and Mat erial Science, IIT Bombay, Mumbai-400 076, India

Abstract : A series of s pinel fe rri te nanopa rtic les viz. mang ane se fe rri te (M nFe2O4 ), zinc f e rri te

( ZnFe2O 4 ), cobalt f erri te ( CoFe2O 4 ) and nic ke l fe rri te (NiFe2O 4 ) we re pre pared by so lvothe rmal

process. X-Ray di ff raction pat te rns s ho w that the s ynthes ize d fe rrite s amples are pure without any

i mpuri tie s. T he as-prepare d fe rri tes we re furthe r use d as a prec urs or c at al ys t for the g ro wth of CNTs

using the rmal c he mic al vapor de posi t ion (CVD) tec hnique . Res ults s ho w that these fe rri tes acted as

ef fective catalys ts for the growth of c arbon nanotubes. T he as-g ro wn nanotubes we re stud ie d by

e lectron mic roscope (F E-SEM). F urt he r st ud ies l i ke Rama n spect rosc opy and VSM analysis we re a ls o

done to e valuate the prope rt ies of the as-pre pared catalyst and the as-g rown carbon nanotubes.

Keywords : Mag ne tic nanopartic les, carbon nanotubes, spinel fe rri tes, the rmal c he mic al vapor deposi tion.


Vol. 92, May 2015, pp. 804-807

Synthesis, characterization and optical properties of nitrogen-doped

ZnTiO3

Budigi Lokesha , R. Vijayaraghavanb and N. Madhusudhana Rao*a

aThin Films Laboratory, Materials Physics Division , School of Advanced Sciences, VIT University, Vellore-632 014, Tamilnadu, India, E-mail : [email protected]

bCentre for Excellence in Nano Materials, School of Advanced Sciences, VIT University, Vellore-632 014, Tamilnadu, India

Abstract : Nitrogen doped terna ry me ta l ox ide ZnT iO3 was synthes ize d by org anic prec urs or method.

Metal be nzoate d ihydrazi nate c omplexes we re prepare d by a s imple in si t u c he mic al method. The

formed metal be nzoate di hydra zinate complexes were dec ompos ed at di ff ere nt te mpe ratures to yie ld

t he corres ponding metal oxides. The s amples we re c hara cte rize d by FT- I R, TGA and DSC, powde r

XRD, DRS, SEM and E DAX. T hermal analys is (TGA and DSC) re ve ale d the decomposi ti on path of

t he metal be nzoate dihydra zinate complexes. XRD analysis conf i rms the polyc rystal line nature of

s amples with pure phase formation. SEM analysis s hows that the formed me ta l ox ide po wde rs are

s phe rica l partic les. EDX c onfirmed the presence of 7 . 5 wt.% of ni troge n in the c ubic phase ZnT iO3 .

T he optic al stud ies we re carrie d by rec ord ing d iff use reflectance s pectra. Us i ng Tauc’s re latio n

( ααααhνννν )n = A (hνννν – Eg ) optical bandg ap for ni troge n dope d ZnTiO 3 was found to be 3 .91 eV.

Keywords : Zinc ti tanate , phase t ransit ions, bandgap, di f fuse re flectance spect rosc opy.


Vol. 92, May 2015, pp. 808-810

Synthesis, characterization and electrochemical sensing property of

quercetin using zinc tungstate nanorods

S. Muthami zha, R. Suresha , K. Giribabua , R. Manigandana , S. Munusamya , S. Praveen

Kumara , A. Stephenb and V. Narayanan*a

aDepartment of Inorganic Chemistry, University of Madras, Guindy Campus, Chennai -600 025, India, E-mail : [email protected]

bDepartment of Nucl ear Physics, University of Madras, Guindy Campus, Chennai-600 025

Abstract : Zinc tungstate (ZnWO 4 ) nanopart ic les we re prepare d by te mplate f ree si mple and c ost

ef fective preci pi tat ion method. The ZnWO4 nano rods we re synthes ize d by re acting 1 : 1 mole rat io of

zi nc acetate and s odi um tungs tate. T he XRD patte rn re veals that the s ynthes ized ZnWO4 has

monocl inic structure. F urthe r, the dif f rac tion peaks we re broade ne d due to the s mal le r size of the

part ic le. The FT-I R analysis c onfirms the prese nce of Zn-O and W-O bonds in ZnWO4 nanorods. The

optic al prope rty of ZnWO 4 nanorods was c arried out by DRS UV-Visible spectrosc opy. The

morphology of ZnWO4 was inves tig ated usi ng SEM analys is and the e lectroc hemic al se nsing be havior

of ZnWO4 nano rods towards (bi omolecules) que rcetin was inves tig ated usi ng cycl ic vo ltamme te r.

Keywords : ZnWO4 , electroche mical detect ion, que rcetin, nano rods.


Vol. 92, May 2015, pp. 811-814

Synthesis, characterization, optical and dielectric studies of layered

K0.5CoO2 oxide material

K. Agilandeswari and A. Ruban Kumar*



Abstract : Molte n f lux has bee n used as an eff ic ient and low te mpe rature met hod to s ynthes ize

K 0 .5CoO2 usi ng KOH as a flux at a te mpe rature of 400 ºC. The products we re characte rize d by

po wde r X-ray diff ract ion (XRD), F ouri er t ra nsforme r infrared s pectrosc opy (FTI R), Scanning

e lectron mic roscope (SEM) and UV-Vis ib le d iffuse reflectance spectrosc opy (DRS). X-Ray di ff ractio n

patte rn c onf irme d the formation of s ing le phase K 0 . 5CoO2 . SEM image i nd ic ates the obtained s amples

are dif fuse d mic ro porous sphe re li ke morpholog y and i t s grai n si ze wi l l be in the range of 100–300

nm. Optic al prope rties of K 0 . 5CoO2 ce ramic s hows an e ne rgy band gap in the range of 2 .50 eV. The

die lectric studies o f laye re d K 0 . 5CoO2 have AC-c onductiv i ty obse rve d for the f re quenc y range from 50

Hz to 5 M Hz and als o as the function of te mpe rature f rom roo m te mperature to 623 K indic ates the

s pace charge polarizat ion c ontributes the conduct ion mec hanism.

Keywords : Oxide, se miconduct or, molte n fl ux , die lectric prope rty.


Vol. 92, May 2015, pp. 815-817

Synthesis, growth and characterizations of organic nonlinear optical

material : 4-Chloroaniline

M. Vijayalakshmi, D. Rajan Babu and R. Ezhil Vizhi*



Abstract : The organic nonl ine ar optic al c rystal 4 -c hloro anil ine was g rown from methanol at roo m

tempe rature by low te mperature so lution growth method . Powde r X-ray diff ract ion was studie d to

confirm the grown c rystal st ructure. The c utoff wavelength for the g ro wn c rys tal was obse rve d at 325

nm and the band gap e ne rgy of 3 .814 eV was dete rmi ne d by record ing the UV-Vis- NI R s pectrum

analysis . T he prese nce of dif fe re nt functi onal g roups of 4 -c hl oroani line we re ide nti fied by FT-I R

s pectra l analys is . T he posi t ion of proton was found out by us i ng 1 H FT-NM R s pectra l analysis . The

t he rmal stab ili ty of the c rys tal was carrie d out by TG- DTG analysis . T he SHG eff ic ie ncy for 4-

c hloroani line was me as ure d by Kurtz-Pe rry powde r tec hn ique and the g rown crys ta l is s uitab le for

NLO applic at ion.

Keywords : Solut ion g rowth, e ne rg y band gap, FT- NM R, SHG.


Vol. 92, May 2015, pp. 818-821

Synthetic studies and structural aspects of metallacyclic derivatives of

tin(IV) : Better precursors for SnO2

Kiran Tummalapallia, Prasanth Vuppalapati Giria , Blassan Samuela , Madhvesh Pathak*a

and Kap Jin Kimb

aMaterials Chemistry Division, School of Advanced Sciences, VIT University, Vellore-632 014, Tamilnadu, India, E-mail : [email protected]. in

bDepartment of Advanced Materials Engineering for Information and Electronics, College of Engineering, Kyung Hee University, Yongin-si, Gyeonggi-do 446-701, South Korea


Abstract : Tin c omplexes of the type [(ac ac)2Sn(O Pr i) 2 - n(OCH2 CH2OR) n], (whe re n = 1–2; R = Me, Et

and Bun) we re synthesi zed by tre at i ng b is( acetylacetonato)di i sopropoxyti n( I V) wi th al kox y al ka nols i n

appropriate molar rat ios. All these react ions have bee n carrie d out in reflux ing be nze ne unde r

anhydro us c onditi ons t o yie ld mononucle ar de ri vati ves and is olate d by e vaporat ing the s olve nt unde r

reduce d press ure. O n the basis of e le me ntal analysis , I R and NM R (1 H and 1 3 C) s pectra l stud ies, a ci s

octahe dral geome try around Sn IV is propose d. T hese de rivatives have prove n thei r wo rth to produce

t in d ioxide at lo w te mpe rature by so l-gel tec hnology.

Keywords : Bis (acety lacetonato)di is opropox yt in(IV) , alkox y al kanols, e le me nta l anal yses .


Vol. 92, May 2015, pp. 822-824

Thermal property analysis of epoxy based silver nanocomposites

V. Velmurugan*, R. Ramachandran and J. P. Raina

Center for Nanotechnology Research, VIT Universi ty, Vellore-632 014, Tamilnadu, India


Abstract : The rmal c onductivi ty of pol yme r compo sites containing si lve r nanopa rtic les i s

i nvestigate d. Nano s ilve r part ic les of an ave rage size of 70 nm is s ynt hesize d by wet c he mical method.

Compos i te wi th di ffe re nt vol ume pe rce ntages o f s i lve r nanopartic les is made a long with SU8 a wel l

kno wn epoxy base d negat ive photoresis t. T o pre dic t the the rmal c onduct iv ity vari ous the ore tic al

mode ls we re studied. Expe rimental dete rminat ion of thermal conduct iv i ty is done by Hot W ire

t echnique. The relati ons hip betwee n the c once ntration of the nanopartic les and t he rmal conduct iv ity

i s inves tig ated. Jeffe rs on, W itzel l and Sibb itt theore tical model is found to be in g ood agree me nt wit h

t he expe rime nta l res ults .

Keywords : SU8, sil ver nano part ic le , thermal conduc tivity , epoxy.

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