Delayed dissociation of photoexcited porphyrin cations in a storage ring: determination of triplet quantum yields.
Delayed dissociation of photoexcited porphyrin cations in a storage ring: determination of triplet quantum yields.
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存储环中光激发卟啉阳离子的延迟解离：三线态量子产率的测定。
DOI：
10.1021/jp050464p
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发表时间：
2005
期刊：
影响因子：
--
通讯作者：
S. Nielsen
中科院分区：
文献类型：
--
作者：
C. Nielsen;J. Forster;P. R. Ogilby;S. Nielsen
描述了一种技术，其中气相卟啉的取代基依赖的激发态性质可以被准确地量化。在静电离子储存环中测量了光激发卟啉阳离子的解离寿命。从这些数据中，获得了以下质子化卟啉的三重态量子产率的上限：原卟啉IX（0.63 +/-0.04）、四苯基卟啉（0.73 +/-0.03）、四（对甲基苯基）卟啉（0.75 +/-0.03）和四（对氰基苯基）卟啉（0.71 +/-0.03）。的值比较以及与那些卟啉在溶液中。
A technique is described wherein substituent-dependent excited-state properties of gas-phase porphyrins can be accurately quantified. Dissociation lifetimes of photoexcited porphyrin cations were measured in an electrostatic ion storage ring. From these data, upper limits for the triplet quantum yield of the following protonated porphyrins were obtained: protoporphyrin IX (0.63 +/- 0.04), tetraphenylporphyrin (0.73 +/- 0.03), tetra(p-methylphenyl)porphyrin (0.75 +/- 0.03), and tetra(p-cyanophenyl)porphyrin (0.71 +/- 0.03). The values compare well with those for porphyrins in solution.