Fluorescence lifetime and nonradiative relaxation dynamics of DCM in nonpolar solvent

Chih Wei Chang, Ya Ting Kao, Eric Wei Guang Diau

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20 引文 斯高帕斯(Scopus)

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.

原文English
頁(從 - 到)110-118
頁數9
期刊Chemical Physics Letters
374
發行號1-2
DOIs
出版狀態Published - 2003 六月 4

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

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