THE INFLUENCE OF SOLVENTS AND POLYMER MATRICES ON THE PHOTOINDUCED ISOMERIZATION OF AN AZOBENZENE CHROMOPHORE

被引：2

作者：

HUSAIN, T

MITCHELL, GR

GILBERT, A

机构：

[1] The Polymer Science Centre, University of Reading, Whiteknights, Reading

来源：

MOLECULAR CRYSTALS AND LIQUID CRYSTALS SCIENCE AND TECHNOLOGY SECTION A-MOLECULAR CRYSTALS AND LIQUID CRYSTALS | 1994年 / 246卷

关键词：

D O I：

10.1080/10587259408037834

中图分类号：

O7 [晶体学];

学科分类号：

0702 ; 070205 ; 0703 ; 080501 ;

摘要：

The thermal cis to trans (Z to E) isomerization process following the photoisomerization of N,N-dimethylaminoazobenzene (methyl yellow) in a number of different solvent matrices; solutions, polymers and a liquid crystal are compared. In the solvents, dichloromethane, methanol, and polyacrylonitrile, a photoinduced stable cis isomer population could only be observed at -90 degrees C. In other solvents such as toluene and polycarbonate, at room temperature, the half-life of the cis form was about thirty minutes. The trans to cis conversion of the methyl yellow was exploited in a low molar mass liquid crystal matrix. Photoinduced shifts of up to 17 degrees C were observed in the nematic to isotropic phase transition temperature.

引用

页码：311 / 314

页数：4