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合成了曙红(EO)二苯基碘鎓盐(DPIO)复合光引发体系,其光响应范围可至可见光区,最大吸收527nm。曙红鎓盐体系无暗反应,但在可见光作用下,由于光诱导电子转移敏化反应使染料发生漂白作用和鎓盐裂解产生活性自由基,由此可引发环氧6101双丙烯酸酯和季戊四醇三丙烯酸酯的光固化。光固化速度与复合体系的结构组成有关,其中曙红双盐(EO(Ph_I)_2)比曙红单盐(EO(Ph_2I))具有更高的引发效率;在同样条件下双分子体系(EONa_2+Ph_2I+BF_4~-)不能引起交联反应。
A composite photoinitiator system of EO (diphenyliodonium) (DPIO) was synthesized. Its photo-response range was up to the visible range and its maximum absorption was 527 nm. Eosinium salt system without dark reaction, but under the action of visible light, due to light-induced electron transfer sensitization reaction so that the dye bleaching effect and onium salt cleavage to generate active free radicals, which can lead to epoxy 6101 diacrylate and pentaerythritol tris Photo-curing of acrylates. The photo-curing rate was related to the composition of the composite system. EO (Ph_I) _2) had higher initial efficiency than EO (Ph_2I). Under the same conditions, + Ph_2I + BF_4 ~ -) can not cause cross-linking reaction.