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本文报道了一种新型感可见光的引发体系-曙红双(二苯基碘鎓盐)(Eo(IPh_2)_2).在基态,这种体系具有良好的热稳定性,而在激发态时能发生离子对内光诱导电子转移反应,导致其发生漂白和碘鎓盐的分解反应,产生具有引发作用的自由基.该体系适用于一般烯类单体的自由基聚合,其中时丙烯酸酯类单体效果最好.在以甲基丙烯酯甲酯(MMA)为单体时,聚合反应速度满足动力学方程:R_p=l[Eo(IPh_2)_2]~(0.38)[MMA],并求得聚合反应的活化能E_c=7.00kcal/mol.氧在Eo(IPh_2)_2光敏引发聚合中,既起自由基聚合阻聚剂的作用,又起引发剂三重态猝灭剂作用
In this paper, we report a new type of visible light initiator system, Eo (IPh_2) _2, which has good thermal stability in the ground state, Ion-mediated internal electron-induced electron transfer reaction, resulting in its bleaching and iodonium salt decomposition reaction, have a triggering effect of free radicals. The system is suitable for general-purpose vinyl monomer free radical polymerization, in which the acrylate-based single The best effect is obtained in the case of methyl methacrylate (MMA) as monomer, the polymerization rate satisfies the kinetic equation: R_p = l [Eo (IPh_2) _2] ~ (0.38) [MMA] The activation energy of the polymerization reaction E_c = 7.00 kcal / mol.Oxygen in Eo (IPh_2) _2 photoinitiation polymerization, both from the role of free radical polymerization inhibitor, and initiator triplet quenching effect