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Conformational change of poly(methylphenylsilane) induced by the photoisomerization of pendant azobenzene moiety in the film state

Paper ID Volume ID Publish Year Pages File Format Full-Text
27475 44026 2008 9 PDF Available
Title
Conformational change of poly(methylphenylsilane) induced by the photoisomerization of pendant azobenzene moiety in the film state
Abstract

Conformational change of the main chain of poly(methylphenylsilane) functionalized with pendant azobenzene has been studied in the solution and in the film state. The conformation of the main chain was found to depend on the molar ratio of the Si units with and without the pendant azobenzene moiety. The inflection region for the conformational change was 0.3–0.5 of the molar ratio. The conformation of the main chain changed by the photoisomerization of the pendant azobenzene moiety in the film state. The efficiency of the conformational change of the main chain increased with the decrease of the molar ratio, accompanied by the highest final value of degree of the conformational change at the molar ratio of 0.5. The reverse conformational change was induced by heating.

Keywords
Polysilanes; Azobenzene; Photo-control; Conformation; Thin film
First Page Preview
Conformational change of poly(methylphenylsilane) induced by the photoisomerization of pendant azobenzene moiety in the film state
Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Photochemistry and Photobiology A: Chemistry - Volume 198, Issues 2–3, 15 August 2008, Pages 135–143
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering