采用双色双激光闪光光解瞬态发射光谱法测定 TMM 双自由基激发态三重态-三重态荧光的寿命和效率。
The lifetime and efficiency of triplet-triplet fluorescence from the excited state of a TMM biradical determined using transient emission spectroscopy by two-color two-laser flash photolysis.
机构信息
Department of Applied Chemistry, Graduate School of Engineering, Osaka Prefecture University, Sakai, Osaka, Japan.
出版信息
Phys Chem Chem Phys. 2013 May 21;15(19):7064-9. doi: 10.1039/c3cp50581b.
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.
2-(4-苯甲酰基苯基)-2-苯基-1-亚甲基环丙烷的单次激光闪光光解（FP）产生了吸收带位于 362 和 545nm 的基态三烯丙基甲烷（TMM）自由基，以及显示 580nm 三重态三重态荧光的该自由基的激发态。激发态自由基很可能通过预期的双光子过程以及意想不到的单光子过程形成。通过采用双色双激光 FP 技术，成功地确定了激发态自由基的荧光量子产率为 0.021。
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