Table of Contents
International Journal of Carbohydrate Chemistry
Volume 2012 (2012), Article ID 356563, 8 pages
Research Article

Thermal and Photoresponsive Studies of Starch Modified with 2-(5-(4-Dimethylamino-benzylidine)-4-oxo-2-thioxo-thiazolidin-3-yl)acetic Acid

1Research and Post Graduate Department of Chemistry, St.Thomas College, Mahatma Gandhi University, Kerala, Pala 686574, India
2Research and Post Graduate Department of Chemistry, St.George College, Mahatma Gandhi University, Kerala, Aruvithura 686122, India

Received 25 August 2012; Revised 9 October 2012; Accepted 10 October 2012

Academic Editor: Jianjun Li

Copyright © 2012 Ambily Chandran et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


The present study describes the synthesis of a chromophoric system 2-(5-(4-dimethylamino-benzylidin)-4-oxo-2-thioxo-thiazolidin-3-yl)acetic acid and its incorporation into starch through esterification of the hydroxyl group by the free carboxyl function of the chromophoric system by DCC coupling. The products were characterized by UV-visible, fluorescence, FT-IR, and NMR spectroscopic methods. The newly developed system was subjected to photoresponsive studies such as light absorption, light stabilization and fluorescence emission. The free chromophoric system and the coupled product were also subjected to thermal analysis. The results show that modification enhances the light absorption and light fastening properties of the chromophoric system. Thermal stability of the polymeric system greatly enhances on attaching the chromophoric system. In view of these results the newly developed system is proposed as a nature friendly, green, and photoactive product which could find application in dyes, inks, paints, and so forth.