Synthesis, Photophysical, and Antioxidant Properties of Rhodamine B Decorated Novel Dendrimers
Jothinathan Sathiya Savithri A and Perumal Rajakumar A B
+ Author Affiliations
- Author Affiliations
A Department of Organic Chemistry, University of Madras, Guindy Campus, Chennai, 600 025, India.
B Corresponding author. Email: perumalrajakumar@gmail.com
Australian Journal of Chemistry 71(6) 399-406 https://doi.org/10.1071/CH17652
Submitted: 22 December 2017 Accepted: 27 March 2018 Published: 14 May 2018
Abstract
Novel triazole bridged dendrimers with rhodamine B derivative as surface groups have been achieved using click chemistry by both divergent and convergent approaches. Rhodamine B decorated dendrimers 1, 2, and 3 were synthesised up to the second generation with spirolactam grafted at the terminal. The UV and fluorescence intensity increases with the increase in the dendritic generation. The synthesised rhodamine B decorated dendrimers show significant antioxidant behaviour compared with the standards butylated hydroxy toluene (BHT) and gallic acid when tested by 1,1-diphenyl-2-picryl hydrazyl (DPPH) radical scavenging assay and hydroxyl radical scavenging assay methods, respectively. Rhodamine B decorated higher generation dendrimers exhibit better antioxidant activity than the lower generation dendrimers due to the presence of a greater number of triazole branching units and rhodamine B derivative surface units.
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