| 香豆素染料与羟基苯基碘鎓盐光敏引发体系的研究 |
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| 作者单位： | 中国科学院理化技术研究所，中国科学院理化技术研究所，中国科学院理化技术研究所 北京100080，中国科学院研究生院，北京100049，北京100080，北京100080 |
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| 摘 要： | 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.
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| 关 键 词： | 香豆素1 羟基苯基碘鎓盐(HTIB) 电子转移光敏化 溶剂效应 |
Study on the Photosensitive System of Coumarin and [Hydroxy(toxyloxy)iodo] benzene |
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| Authors: | LI Xue |
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| Abstract: | The photosensitive system of hydroxy(toxyloxy)iodo]benzene(HTIB) was studied by absorption spectra,fluorescence quenching and photopolymerization.The photosensitizer coumarin 1 with electron-donating property could extend the absorption of HTIB to near UV.The initiation efficiency of coumarin 1/HTIB system depended on the solvents largely.In DMSO,the polymerization of methyl methacrylate(MMA) could be carried out efficiently.However the photopolymerization was inhibited in acetonitrile.It was ascribed to the complex formed between coumarin 1 and HTIB photolyzed to unreactive species after irradiation in acetonitrile.The results obtained here can afford valuable information for the study of other photosensitive system contained monoaryl iodonium. |
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| Keywords: | coumarin 1 [hydroxy(toxyloxy)iodo]benzene electron transfer photosensitization solvent effects |
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