Thermal cis—trans isomerization kinetics of azo compound in the assembled monolayer film: an electrochemical approach

✍ Scribed by Zhong-Fan Liu; Kazuhito Hashimoto; Akira Fujishima

• Publisher: Elsevier Science
• Year: 1991
• Tongue: English
• Weight: 331 KB
• Volume: 185
• Category: Article
• ISSN: 0009-2614
• DOI: 10.1016/0009-2614(91)80250-2

✦ Synopsis

The thermal cis-trans isomerization of an amphiphilic azo compound in the assembled monolayer film has been investigated kinetically, using an electrochemical approach to follow the reaction process. The isomerlzation in the rigid monolayer film was found still to follow the first-order kinetics. Surprisingly, in spite of the rigld and highly oriented tilm structure, the activation enthalpy did not exhibit an essential difference from those of azo analogs in liquid phase, but was distinctly smaller than those in crystal. The observed kinetic behavior is attributed to the special isomerization environment employed.