1  

10.1071/CH17652_AC

CSIRO 2018

Australian Journal of Chemistry 2018, 71(6), 399-406

SUPPLEMENTARY MATERIAL

Synthesis, photophysical and antioxidant properties of rhodamine B

decorated novel dendrimers

Jothinathan Sathiya Savithri and Perumal Rajakumar*

Department of Organic Chemistry, University of Madras, Guindy Campus

Chennai – 600 025, INDIA

*Corresponding Author: Tel No: +91 44 2220 2814; E-Mail: perumalrajakumar@gmail.com 

 

Content

1NMR and 13C NMR of the compound 1, 2, 3, 5, 8, 9, 11 and 12 ………………..S-1

Mass Spectrum of the dendrimers 1, 2, 3.................................................................S-2

Antioxidant activity of the dendrimers 1, 2, 3…………………………………… S-3

 

 

 

 

 

2  

S-1

 

 

        1H NMR Spectrum (300MHz, CDCl3) of compound 5

3  

 

13C NMR spectrum (75MHz, CDCl3) of compound 5 

 

 

4  

 

 

 

                              1H NMR Spectrum (300MHz, DMSO-d6) of dendritic chloride 8

 

 

 

5  

 

13C NMR spectrum (75MHz, DMSO-d6) of dendritic chloride 8 

6  

                                         1H NMR Spectrum (300MHz, CDCl3) of dendritic azide 9

7  

 

13C NMR spectrum (75MHz, CDCl3) of dendritic azide 9

 

8  

1H NMR Spectrum (300MHz, CDCl3) of phenolic dendron 11

9  

13C NMR spectrum (75MHz, CDCl3) of phenolic dendron 11

10  

                                         1H NMR Spectrum (300MHz, CDCl3) of the compound 12 

11  

 

13C NMR spectrum (75MHz, CDCl3) of alkyne dendron 12

12  

                                          1H NMR Spectrum (300MHz, CDCl3) of dendrimer1

 

13  

13C NMR spectrum (75MHz, CDCl3) of dendrimer 1

14  

1H NMR Spectrum (300MHz, CDCl3) of dendrimer 2

15  

13C NMR spectrum (75MHz, CDCl3) of dendrimer 2

16  

1H NMR Spectrum (300MHz, CDCl3) of dendrimer 3

17  

13C NMR spectrum (75MHz, CDCl3) of dendrimer 3 

S-2

18  

Mass spectrum of dendrimer 1

[a.u.] x10

4 765.266

1244.506

Intens.

2.0

1723.577 [M+H]+

1.5

1.0

523.134

0.5

681.203

1389.910

0.0

500 750 1000 1250 1500 1750 2000 2250 2500 2750 m/z

19  

Mass Spectrum of dendrimer 2

Mass spectrum of dendrimer 2

[M+H]+

20  

Mass Spectrum of dendrimer 3

S-3

[M+H]+

21  

DPPH scavenging assay Method

Fig. S1 DPPH scavenging activity determined from the spectrophotometric assay are various

concentration of rhodamine B decorated dendrimer 1, 2 and 3

Fig.S2 DPPH scavenging capacities (EC50) of rhodamine B decorated dendrimer 1, 2 and 3

comparable with the standard viz., butylated hydroxyl toluene (BHT).

0

20

40

60

80

100

120

20 40 60 80 100

DPPH Scavenging Activity (%

)

Concentration (µg/mL)

1

2

3

BHT

0

10

20

30

40

50

60

70

1 2 3 BHT

EC50value (µg/mL)

Dendrimers  

22  

Hydroxyl radical Scavenging Assay method

Fig. S3 Hydroxyl radical scavenging activity determined from the spectrophotometric assay with

various concentration of rhodamine B decorated dendrimer 1, 2 and 3

Fig. S4 Hydroxyl radical scavenging capacities (EC50) of rhodamine B decorated dendrimer 1, 2

and 3 comparable with the standard viz., Gallic Acid.

0

10

20

30

40

50

60

70

80

90

100

20 40 60 80 100

HO

.Scavenging Activity (%

)

Concentration (µg/mL)

1

2

3

Gallic Acid

0

10

20

30

40

50

60

70

1 2 3 Gallic acid

EC50value (µg/mL)

Dendrimers