DISPERSIVE 1ST-ORDER REACTIONS .2. PHOTOCHROMIC MODEL SYSTEM

被引：8

作者：

ALBRECHT, U ^{[1
]}

SCHAFER, H ^{[1
]}

RICHERT, R ^{[1
]}

机构：

[1] UNIV LEIPZIG,FACHBEREICH PHYS,D-04103 LEIPZIG,GERMANY

来源：

CHEMICAL PHYSICS | 1994年 / 182卷 / 01期

关键词：

D O I：

10.1016/0301-0104(94)00012-3

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：

The photochromic reactions spiropyran-merocyanine in polymeric matrices have been analysed with respect to their distributions of rates in order to understand the matrix effects on the kinetics in the transition range from a static to fluid environment. Employing the technique of part I we find a static matrix situation only below the Vogel-Fulcher temperature T(VF) of the polymer where different species are identified in terms of distinct but distributed decolouration rates. Above the glass transition T(G) the ensemble averaged reaction approaches an exponential decay pattern, due to the fluctuations of site specific barriers and exchange mechanisms among the set of merocyanine isomers.

引用

页码：61 / 68

页数：8

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