Research on the Production Reaction Kinetics and Thermochromism of Salicylaldehyde Ethanolamine Schiff Base

A thermo chromic materials named Salicylaldehyde ethanolamine Schiff base was synthesized with ethanolamine and salicylaldehayde derivative in the medium of ethanol, and was characterized by means of UV-Vis absorption, GCMS. The reaction kinetics of Schiff base production was investigated through UV-Vis absorption spectra, and also the thermochromism of Schiff Base Condensed from ethanolamine and salicylaldehayde were studied by UV-Vis absorption spectra in different solvents. From the kinetics studies, the reaction rate constant at different temperature were obtained and the Ea of the reaction were calculated as 23.843KJ/mol. In thermochromism studies, Salicylalhayde-ethanolamine solution showed a reversible color change from dark yellow - to - light yellow as the temperature is varied between 30°C and 80°C, and repeated heating-cooling cycles can lead to the switches between dark yellow and light yellow colors.