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Electrochemical Synthesis and Optical Properties of a Chiral Poly[1,4-bis(3′,4′-ethylenedioxythienyl)-phenylene] Derivative

✍ Scribed by Hiromasa Goto; Yong Soo Jeong; Kazuo Akagi

Publisher
John Wiley and Sons
Year
2005
Tongue
English
Weight
121 KB
Volume
26
Category
Article
ISSN
1022-1336

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✦ Synopsis

Abstract

Summary: Optically active poly[(R)‐ or (S)‐1,4‐bis(2‐(3′,4′‐ethylenedioxy)thienyl)‐2‐benzoic acid 1‐methylheptyl ester] was prepared by an electrochemical technique and characterized by circular dichroism measurements. It was found that the optical activity and optical rotation of the film could be controlled by adjusting the electronic state of the electrochemical process. Polymer films prepared in the oxidized state exhibit a weak Cotton effect, while the reduced polymer film exhibits the expected mirror‐image bisignate Cotton effect in the region of the π–π* transition of the polymer main chain. These results indicate that the main chain itself is chiral in the film state. This procedure has great potential for the preparation of functional electrochromic devices and the improved preparation of durable electrochromic devices based on the good film‐forming properties of the chiral polymer.

Cyclic voltammogram and CD spectra of the chiral polymer thin film produced here.

imageCyclic voltammogram and CD spectra of the chiral polymer thin film produced here.

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