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研究了6′-硝基-1,3,3-三甲基吲(口乃木)苯骈螺吡喃,Ⅰ,和6′-硝基-1-苯基-3,3-二甲基吲(口乃木)苯骈螺吡喃,Ⅱ,的光化学,Ⅰ的直接光解和敏化光解均得到份菁结构的光解产物Ⅲ,量子产率分别是0.42和0.32。Ⅱ直接光解时生成相应的有色光解产物Ⅳ,量子产率是0.40,氮杂蒽酮为敏化剂的敏化光解量子产率是0.58,无疑地,单线态和三线态均参予螺吡喃的发色反应,用这些结果和折算关系式得到,在Ⅰ的直接光解中,Ⅲ主要来自单线态,而在Ⅱ的直接光解中,Ⅳ主要来自三线态。从Ⅰ或Ⅱ的敏化联乙酰燐光实验中求得三线态参数。它们是:,;,,类似地,,,这样,值较小是由于值较小,而三线态寿命随结构变动不大。最后,取苯乙烯为模型,用它的电子能量与乙烯双键扭曲角度关系图推断出,来自单线态的双离子具有螺环构型,而来自三线态者具有平面状构型。
Studies have been conducted on the synthesis of 6’-nitro-1,3,3-trimethylindole (normoxifene) benzospiropyran, I, and 6’-nitro-1-phenyl-3,3-dimethylindole (Norangan) benzospiropyran, Ⅱ, photochemical, Ⅰ direct photolysis and sensitized photolysis were obtained photolysis product of merocyanine structure Ⅲ, the quantum yield was 0.42 and 0.32, respectively. Ⅱ directly photolysis to generate the corresponding colored photolysis products Ⅳ, the quantum yield is 0.40, azadirachtin sensitizer is the sensitizing photolysis quantum yield 0.58, no doubt, singlet and triplet are involved The chromogenic reaction of spiropyran was obtained using these results and the conversion equation. In the direct photolysis of Ⅰ, Ⅲ mainly came from the singlet state, whereas in the direct photolysis of Ⅱ, IV mainly came from the triplet state. The triplet parameters were obtained from the sensitized mesogenyl light of Ⅰ or Ⅱ. They are: ,,, ,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,, ,,,,,,,,,,,,,,,,,,,,,,,,, Finally, taking styrene as a model, we deduced from its relation between the electron energy and the angle of twisting of ethylene double bonds that the double ions from the singlet state have a spirocyclic structure and the one from the triplet state has a planar structure.