David Holland, Leroy Stodick, Stephen Devadoss and Joydeep Ghosh 2004
Mainak Ganguly, Chanchal Mondal,Joydeep Chowdhury,Jaya Pal ... · 1 . Electronic Supplementary...
Transcript of Mainak Ganguly, Chanchal Mondal,Joydeep Chowdhury,Jaya Pal ... · 1 . Electronic Supplementary...
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Electronic Supplementary Information
Tuning of Metal Enhanced Fluorescence for Sensing Applications
Mainak Ganguly, Chanchal Mondal, Joydeep Chowdhury, Jaya Pal, Anjali Pal, and Tarasankar Pal*
Electronic Supplementary Material (ESI) for Dalton TransactionsThis journal is © The Royal Society of Chemistry 2013
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Figure S1: IR spectrum of CP (cm-1, KBr disk). 1645 (vs, νC=N), 1613, 1583, 1494, 1485, 1465, 1420 (vs or s, νC=C).
500 1000 1500 2000 2500 3000 3500
40
50
60
70
80
90
Tran
smitt
ance
(%)
Wavenumber (cm-1)
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Figure 2: Mass spectra of CP.
(CP + H) (CP + Na)
(CP + K)
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Figure S3: 1H-NMR spectrum of CP in d6-DMSO. δppm: 8.39 (3H, s, OH), 8.23 (2H, s, N=C-H), 6.6-7.4 (12H, m, Ar-H), 2.4-2.8 (12H, m, CH2).
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Figure S4: 13C-NMR of CP in DMSO. δppm: 50.6-57.4 (N-CH2-CH2-N), 79.7 (Ar-CN2), 167.2 (-HC=N), 119 and 133 (C in aromatic ring).
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Figure S5: ESI-mass spectrum of CP capped AgNPs. Peak : 506 (OCP + 2Na + 2H), 612 (OCP + 2Na + Ag), 718 (OCP + 2Na + 2Ag), 824 (OCP + 2Na + 2Ag).
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Figure S6: Excitation spectra of (a) unexposed CP, (b) CP-Ag(I) after one hour exposure and (c) CP-Cu(II) after 14 hours exposure and (d) CP-Au(III) after 11 hours exposure. Condition: [CP] = 1.4 x 10-4 M, [Ag(I)] = 4.2 x 10-4 M, [Cu(II)] = 0.70 x 10-4 M, [Au(III)] = 4.2 x 10-4 M.
200 300 400
0
200
400
600
800
1000
d
c
b
a
Inte
nsity
(a.u
.)
Wavelength (nm)
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Figure S7: Absorption spectra of (a) unexposed CP, (b) CP-Ag(I) after one hour exposure and (c) CP-Cu(III) after 14 hours exposure. Condition: [CP] = 1.4 x 10-4 M, [Ag(I)] = 4.2 x 10-4 M, [Cu(II)] = 0.70 x 10-4 M.
300 400 500
0.0
0.5
1.0
1.5
2.0
2.5
b
ac
Abso
rban
ce (a
.u.)
Wavelength (nm)
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Figure S8: FESEM image of AuNPs obtained as precipitate by adding Ag(I) to the gold hydrosol. Condition: [CP] = 1.4 x 10-4 M, [Au(III)] = 4.2 x 10-4 M, [Ag(I)] = 4.2 x 10-4 M.
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Figure S9: Bar diagram and normalized fluorescence spectra (inset) indicating copper enhanced fluorescence in presence of different interfering metal ions. Conditions: [CP] = 1.4 x 10-5 M, [Cu(II)] = 0.70 x 10-5 M, [other Mn+] = 0.70 x 10-5 M, λex = 290 nm, exposure time = 14 hours.
Ag (I)
+ Cu(
II)
Cu(II)
+ Au
(III)
Cu(II)
+ Ni (
II)
Cu(II)
+ Mg
(II)
Cu (II
)Cu
(II)
+ K
(I)Cu
(II)
+ Ba
(II)
Cu (I
I) +
Mn
(II)
Cu (I
I) +
Cd(II
)Cu
(II)
+ Zn
(II)
Cu (I
I) +
Pb(II
)Cu
(II) +
Co
(II)
Cu(II
) + P
d (II
)Cu
(II) +
Pt (
II)Cu
(II)
+ Hg
(II)Nor
mal
ized
Flu
ores
cenc
e In
tens
ityAg
(I) +
Cu(II)
Cu(II)
+ Au
(III)
Cu(II)
+ Ni (
II)
Cu(II)
+ Mg
(II)
Cu (II
)Cu
(II)
+ K
(I)Cu
(II)
+ Ba
(II)
Cu (I
I) +
Mn
(II)
Cu (I
I) +
Cd(II
)Cu
(II)
+ Zn
(II)
Cu (I
I) +
Pb(II
)Cu
(II) +
Co
(II)
Cu(II
) + P
d (II
)Cu
(II) +
Pt (
II)Cu
(II)
+ Hg
(II)
Ag (I)
+ Cu(
II)
Cu(II)
+ Au
(III)
Cu(II)
+ Ni (
II)
Cu(II)
+ Mg
(II)
Cu (II
)Cu
(II)
+ K
(I)Cu
(II)
+ Ba
(II)
Cu (I
I) +
Mn
(II)
Cu (I
I) +
Cd(II
)Cu
(II)
+ Zn
(II)
Cu (I
I) +
Pb(II
)Cu
(II) +
Co
(II)
Cu(II
) + P
d (II
)Cu
(II) +
Pt (
II)Cu
(II)
+ Hg
(II)
Ag (I)
+ Cu(
II)
Cu(II)
+ Au
(III)
Cu(II)
+ Ni (
II)
Cu(II)
+ Mg
(II)
Cu (II
)Cu
(II)
+ K
(I)Cu
(II)
+ Ba
(II)
Cu (I
I) +
Mn
(II)
Cu (I
I) +
Cd(II
)Cu
(II)
+ Zn
(II)
Cu (I
I) +
Pb(II
)Cu
(II) +
Co
(II)
Cu(II
) + P
d (II
)Cu
(II) +
Pt (
II)Cu
(II)
+ Hg
(II)Nor
mal
ized
Flu
ores
cenc
e In
tens
ity
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Figure S10: 1H NMR of (A) CP and (B) CP-Ag(I) after ~7 hours ageing in alkaline D2O.
A
B
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Figure S11: Raman spectra of solid CP, exposed CP in NaOH and exposed CP-Ag(I) in NaOH.
Condition: [CP] = 1.4 x 10-4 M, [Au(III)] = 4.2 x 10-4 M, Exposure time = one hour.
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0
20000
40000
60000
80000
100000
120000
Silver hydrosolCP in NaOH solid CP
Inte
nsity
(a.u
.)
Raman Shift (cm-1)
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Scheme S1: Mechanism for evolution of coinage metal nanoparticles with the oxidation of CP to its quinone form in aqueous alkaline medium.
N NN NH H
OH HO
HO
CP
OH O-Na+ O
NaOH Ag+
+ Ag(0)
N NN NH H
OH HO
HO
CP
N NN NH H
OH HO
HO
CP
OH O-Na+ O
NaOH Ag+
+ Ag(0)
OHOH O-Na+O-Na+ O
NaOH Ag+
+ Ag(0)NaOH Ag+
+ Ag(0)
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Table S1: Elemental analysis for the compound CP.
Element Calculated (%) Experimental (%) C 70.72 70.80 N 12.22 12.11 H 06.59 06.50
Electronic Supplementary Material (ESI) for Dalton TransactionsThis journal is © The Royal Society of Chemistry 2013