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标题螺吡喃(Sp)甲醇溶液直接和二苯酮敏化光发色反应的量子产率分别是0.38和0.53.2,3-丁二酮首先猝灭三线态的光发色,然后,在较高浓度时,猝灭单线态的光反应.从敏化和猝灭反应的动力学分析,计算在直接光解中的初级光物理、光化学过程的量子产率.数据表明,Sp的三线态和单线态都有光反应活性,这与反应状态相关图分析结果相一致.三线态的参数是~3τ=2.2×10~(-3) ms,κ_r=9.13×10~4s~(-1),κ_(?)=8.27×10~4 s~(-1).而且,一旦生成激发三线态,它的光化学活性大约比激发单线态大2倍.
The quantum yields of the title spiropyran (Sp) methanol solution directly and benzophenone sensitized photochromic reaction were 0.38 and 0.53.2, respectively, with the first quenching of the triplet state of optical hair color, followed by At higher concentrations, the photon reaction of the singlet state is quenched.The quantum yield of the primary photophysical and photochemical processes in the direct photolysis is calculated from the kinetic analysis of sensitization and quenching reactions.The data show that the triplet state of Sp And the singlet state all have photoreaction activity, which is consistent with the results of correlation analysis of the reaction state.The parameters of triplet state are ~ 3τ = 2.2 × 10 -3 ms and κ_r = 9.13 × 10 ~ 4 s -1, κ = 8.27 × 10 ~ 4 s ~ (-1) Moreover, once the excited triplet state is generated, its photochemical activity is about 2 times larger than the excited singlet state.