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本工作采用激光闪光光解法对香豆素酮类化合物敏化碘鎓盐化合物问题进行了研究。结果表明:碘鎓盐化合物能通过电子转移机理猝灭香豆素酮的激发三重态。工作中还用甲基紫精(PQ~(2+))为模型化物,观察到它也能使香豆素酮的三重态猝灭,同时可看到在位于610nm处的PQ~+生成。这些结果说明,在发生电子转移的反应中香豆素酮是电子给体,按Weller公式的计算结果也表明它们之间可发生电子转移反应。
In this work, the problem of sensitizing iodonium compounds of coumarin ketones was studied by laser flash photolysis. The results show that the iodonium compounds can quench the excited triplet state of coumarin through the electron transfer mechanism. Methyl viologen (PQ ~ (2+)) was also used as a model compound. It was also observed that it quenched the triplet state of coumarin and also showed PQ + production at 610 nm. These results indicate that coumarin is an electron donor in the electron-transfer reaction and the calculation by Weller’s equation also shows that electron transfer reactions can take place between them.