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本文通过吸收光谱、荧光猝灭、光聚合方法对羟基苯基碘盐(HTIB)的光敏引发体系进行了研究,发现具有给电子性的光敏剂香豆素1可以将引发剂羟基苯基碘盐的光响应移到长波区,而引发聚合效率与溶剂的性质有很大的关系.在一般极性溶剂中如DMSO中能有效地引发甲基丙烯酸甲酯(MMA)光聚合,而在电子受体性质的极性溶剂如乙腈中,光聚合反应受阻,这归结于香豆素1与羟基苯基碘盐形成络合物,使得光反应后生成不具活性的产物.该结果对研究其它单苯基碘盐的光敏体系提供了有价值的信息.
In this paper, the photoinitiating system of hydroxyphenyl iodonium salt (HTIB) was studied by absorption spectroscopy, fluorescence quenching and photopolymerization. It was found that coumarin 1, an electron-donating photosensitizer,光 salt light response to move to the long wave region, and the polymerization efficiency and the nature of the solvent has a great relationship in general polar solvents such as DMSO can effectively initiate the methyl methacrylate (MMA) photopolymerization, and in Photopolymerization was blocked in a polar solvent of electron acceptor such as acetonitrile due to the formation of a complex of coumarin 1 with hydroxyphenyliodonium salt resulting in photoreaction to produce an inactive product.This result is of great interest for the study Other monophenyl iodonium salt photosensitive system provides valuable information.