PHOTOTRANSFORMATION OF MEROCYANINE FORMS OF SPIROPYRANS IN AMORPHOUS POLYMERIC MEDIA

被引：11
|
作者：
UZNANSKI, P
WOJDA, A
KRYSZEWSKI, M
机构：
[1] Centre of Molecular and Macromolecular Studies, Polish Academy of Science, 90-363 Łódź
来源：
EUROPEAN POLYMER JOURNAL | 1990年 / 26卷 / 02期
关键词：
13;
D O I：
10.1016/0014-3057(90)90178-7
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
The influence of annealing time below Tg on the kinetic behaviour of photochromic spiropyran molecules, with long aliphatic substituents, embedded in polystyrene solid solution is discussed. The data indicate an increase of Mc → Sp phototransformation rate as a function of aging, in contrast to the results of the influence of free volume distribution in the polymers obtained by using azobenzene chromophore. A linear dichroism spectrum produced by photoselection and phototransformation kinetics measured at different parts of the Mc absorption band reveal that the observed divergences may result from different kinetic constants of individual stereoisomers and from the presence of long chain substituents in the probe under study. © 1990.
引用
收藏
页码：141 / 143
页数：3
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