铁芳烃配合物光引发剂的敏化研究

A Study on the Sensitization of the Cationic Iron(Ⅱ)-arene Complex Photoinitiator

本文对铁芳烃配合物的敏化光解问题进行了研究,发现敏化剂双二甲基氨基苄叉酮类化合物在敏化过程中不仅存在有电子转移和能量转移过程,而且还可能有分解产物与敏化剂间的成盐反应,另外还发现经电子转移反应的产物中存在着能引发烯类单体聚合的活性自由基,可以引发甲基丙烯酸甲酯聚合。本文对可能的光化学反应机制进行了讨论。

In this work, the photolysis of cationic iron(Ⅱ)-arene complex[(η~6-(1-methyl-ethyl)benzene)(η~5-cyclopentadienyl)iron(Ⅱ)-hexafluorophosphate] (1) with sensitizer[his (p-N, N-dimethylaminobenzylidene) cyclopentanone] (2) has been studied. ResuIts obtained in the process of sensitization showed that not only the electron transfer and energy transfer process, but also the salt formation reaction of sensitizer with photoltic product of iron(Ⅱ)-arene complex occured. Results have also indicated that some active radicals which can initiate the polymerization of ethylenically unsaturated monomer, e. g. methyl methylacrylate, were observed in the products from the electran transfer process. The mechanism of photolysis has been discussed preliminarily.