Thermal and photoresponsive studies on starch modified with 4‐[(E)‐2‐(3‐hydroxynaphthalen‐2‐yl)diazen‐1‐yl]benzoic acid

Abstract

AbstractThe chemical modification of starch is of interest because the modification would not change the fundamental skeleton of starch, would keep the original physicochemical and biochemical properties and finally would bring new or improved properties. A chromophoric system 4‐[(E)‐2‐(3‐hydroxynaphthalen‐2‐yl)diazen‐1‐yl]benzoic acid was synthesized and incorporated into the biopolymeric core of starch by DCC coupling. The products were characterized by UV–visible, fluorescence, FT‐IR, and NMR spectroscopic methods and subjected to thermal and photoresponsive studies. 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 to chromophoric system. In this research article an attempt has been done to explore present and future industrial prospects of functionally modified starches.