The Lifetime and Efficiency of Triplet-Triplet Fluorescence from the Excited State of a TMM Biradical Determined Using Transient Emission Spectroscopy on Two-color Two-laser Flash Photolysis
The Lifetime and Efficiency of Triplet-Triplet Fluorescence from the Excited State of a TMM Biradical Determined Using Transient Emission Spectroscopy on Two-color Two-laser Flash Photolysis
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使用瞬态发射光谱法测定二色双激光闪光光解的 TMM 双自由基激发态三重态荧光的寿命和效率
DOI：
10.1039/c3cp50581b
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发表时间：
2013
期刊：
影响因子：
--
通讯作者：
H.
中科院分区：
文献类型：
--
作者：
Matsui;Y.; Kawahara;D.; Ohta;E.; Ikeda;H.
2-(4-苯甲酰基苯基)-2-苯基-1-亚甲基环丙烷的单激光闪光光解 (FP) 产生基态三亚甲基甲烷 (TMM) 双自由基，其吸收带位于 362 和 545 nm，该双自由基的激发态在 580 nm 处显示三重态-三重态荧光。激发的双自由基可能是通过预期的双光子过程以及意外的单光子过程形成的。采用双色双激光 FP 技术成功测定了激发双自由基的荧光量子产率为 0.021。
The single laser flash photolysis (FP) of 2-(4-benzoylphenyl)-2-phenyl-1-methylenecyclopropane gave rise to a ground state trimethylenemethane (TMM) biradical with absorption bands at 362 and 545 nm and an excited state of this biradical that displays triplet–triplet fluorescence at 580 nm. The excited biradical is likely formed via an expected two-photon process as well as an unexpected one-photon process. The fluorescence quantum yield of the excited biradical, 0.021, was successfully determined by employing a two-color two-laser FP technique.