Fluorescence lifetime and nonradiative relaxation dynamics of DCM in nonpolar solvent

Chih Wei Chang; Ya-Ting Kao; Wei-Guang Diau

doi:10.1016/S0009-2614(03)00645-6

Fluorescence lifetime and nonradiative relaxation dynamics of DCM in nonpolar solvent

Chih Wei Chang, Ya-Ting Kao, Wei-Guang Diau^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

21 Scopus citations

Abstract

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.

Original language	English
Pages (from-to)	110-118
Number of pages	9
Journal	Chemical Physics Letters
Volume	374
Issue number	1-2
DOIs	https://doi.org/10.1016/S0009-2614(03)00645-6
State	Published - 4 Jun 2003

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title = "Fluorescence lifetime and nonradiative relaxation dynamics of DCM in nonpolar solvent",

abstract = "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.",

author = "Chang, {Chih Wei} and Ya-Ting Kao and Wei-Guang Diau",

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journal = "Chemical Physics Letters",

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T1 - Fluorescence lifetime and nonradiative relaxation dynamics of DCM in nonpolar solvent

AU - Chang, Chih Wei

AU - Kao, Ya-Ting

AU - Diau, Wei-Guang

PY - 2003/6/4

Y1 - 2003/6/4

N2 - 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.

AB - 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.

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U2 - 10.1016/S0009-2614(03)00645-6

DO - 10.1016/S0009-2614(03)00645-6

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VL - 374

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EP - 118

JO - Chemical Physics Letters

JF - Chemical Physics Letters

SN - 0009-2614

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