Photochemistry in polymer solids. 11. The effects of the size of reaction groups and the mode of photoisomerization on photochromic reactions in polycarbonate film
Photochemistry in polymer solids. 11. The effects of the size of reaction groups and the mode of photoisomerization on photochromic reactions in polycarbonate film
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DOI：
10.1021/ma00010a042
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发表时间：
1991-05
期刊：
影响因子：
5.5
通讯作者：
T. Naito;K. Horie;I. Mita
中科院分区：
文献类型：
--
作者：
T. Naito;K. Horie;I. Mita
在液氦温度至 373 K 范围内测量了分子分散在聚碳酸酯薄膜中的 9,9'-偶氮菲和二苯乙烯的反式至顺式光异构化和顺式至反式热异构化。结果表明，偶氮化合物通过反转机制进行异构化，该反转机制需要比二苯乙烯的旋转机制更小的扫掠体积。给出了根据动力学模型的模拟结果，以解释光异构化的非一级反应曲线及其温度依赖性
The trans to cis photoisomerization and cis to trans thermal isomerization of 9,9'-azophenanthrene and stilbene molecularly dispersed in polycarbonate films were measured from liquid helium temperature to 373 K. The results suggest that azo compounds isomerize via an inversion mechanism that requires a smaller sweeping volume than the rotation mechanism for stilbene. The results of a simulation according to a kinetic model were given in order to explain the non-first-order reaction profiles of photoisomerization and their temperature dependences