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題名: Fluorescence Lifetime and Nonradiative Relaxation Dynamics of DCM in Nonpolar Solvent
作者: Chang, Chih-Wei;Kao, Ya-Ting;Diau, Eric Wei-Guang
貢獻者: 化學系
日期: 2003-06
上傳時間: 2013-02-05T02:21:10Z
出版者: Elsevier
摘要: The nonradiative dynamics of DCM in hexane have been investigated using femtosecond fluorescence up-conversion technique at three excitation wavelengths (400, 445 and 480 nm). The S1 lifetime was observed to be 9.8 � 0.5 ps, which is independent of the excitation and the fluorescence wavelengths. The observed S1 lifetimes of DCJT and DCJTB are slower than those of DCM and DCMB by one order of magnitude, indicating the significance of the twisting motion of the amino group affecting the S1 nonradiative dynamics. TDDFT calculations suggest that an intersystem crossing is responsible for the observed S1 dynamics of DCM in nonpolar solvent.
關聯: Chemical Physics Letters, 374(1-2): 110-118
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