Light induced cis-trans isomerization of azo compounds in polymethyl methacrylate

被引：16

作者：

Grebenkin, SY

Bol'shakov, BV ^{[1
]}

机构：

[1] Novosibirsk Chem Kinet & Combust Inst, Novosibirsk 630090, Russia

[2] Novosibirsk State Univ, Novosibirsk 630090, Russia

来源：

CHEMICAL PHYSICS | 1998年 / 234卷 / 1-3期

关键词：

cis-trans isomerization; azo compounds; polymethyl methacrylate;

D O I：

10.1016/S0301-0104(98)00169-4

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

UV-VIS spectroscopy has been used to monitor the kinetics of cis --> trans isomerization of two azo compounds following trans --> cis photoisomerization that was carried out under light with shorter (405 nm) and longer (546 nm) wavelengths in polymethyl methacrylate. Light with shorter wavelength produces more reactive cis particles. The results are explained in terms of the following model. First, some fraction of trans molecules does not isomerize into cis molecules under longer wavelength irradiation in polymethyl methacrylate but does so for shorter wavelength. Second, these molecules have a greater rate constant of "dark isomerization'' and a greater quantum yield of back photoisomerization under 546 nm irradiation. (C) 1998 Elsevier Science B.V. All rights reserved.

引用

页码：239 / 248

页数：10

共 19 条

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