The excited state behavior of Group IA alkaline-metal phthalocyanines revealed by photoluminescence and singlet oxygen formation
作者:Limin Liu、Xian-Fu Zhang
DOI:10.1016/j.saa.2021.120297
日期:2022.1
lifetimes, as well as singletoxygenformation quantum yields have been measured in DMF. These photophysical properties are compared with that of H2Pc. The fluorescence and singletoxygenformation properties reveal that alkaline metal Pcs show weak heavy atom effect. The results also reveal that alkaline-metal Pcs (Na2Pc, K2Pc, Rb2Pc, and Cs2Pc) show very different excited singlet state (S1) behavior
IA 族碱金属酞菁 (Pc) 配合物(Li 2 Pc、Na 2 Pc、K 2 Pc、Rb 2 Pc、Cs 2 Pc)已被合成和纯化以研究它们的激发态行为。它们的紫外-可见电子吸收光谱、荧光发射和激发光谱、荧光量子产率和寿命,以及单线态氧形成量子产率已经在 DMF 中进行了测量。将这些光物理特性与H 2 Pc 的光物理特性进行比较。荧光和单线态氧形成特性表明碱金属Pcs表现出弱重原子效应。结果还表明,碱金属 Pcs(Na 2 Pc、K 2 Pc、Rb 2Pc 和 Cs 2 Pc) 显示出与 Li 2 PC 和 H 2 Pc非常不同的激发单线态 (S 1 ) 行为。Li 2 PC 的S 1衰变主要是通过系统间交叉和荧光,而 M 2 Pc (M = Na, K, Rb, Cs)的 S 1衰变主要是金属离子离解:M 2 Pc(S 1 ) → 2 M + + [Pc] 2- (S 1 ),除了系统间交叉。