Kai Niu, Li-qing Dong, Shu-lin Cong¤. Internal Conversion Process of Chlorophyll a in Solvents in Femtosecond Pump-Probe Laser Fields[J]. Chinese Journal of Chemical Physics , 2008, 21(3): 211-216. doi: 10.1088/1674-0068/21/03/211-216
Citation: Kai Niu, Li-qing Dong, Shu-lin Cong¤. Internal Conversion Process of Chlorophyll a in Solvents in Femtosecond Pump-Probe Laser Fields[J]. Chinese Journal of Chemical Physics , 2008, 21(3): 211-216. doi: 10.1088/1674-0068/21/03/211-216

Internal Conversion Process of Chlorophyll a in Solvents in Femtosecond Pump-Probe Laser Fields

doi: 10.1088/1674-0068/21/03/211-216
Funds:  This work was supported by the National Natural Science Foundation of China (No.10674022 and No.20633070).
  • Received Date: 2007-10-10
  • Rev Recd Date: 2007-12-22
  • The internal conversion (IC) processes of chlorophyll a (chl-a) in solvents are studied based on the reduced density matrix theory. The IC times can be obtained by simulating the experimental fluorescence depletion spectra (FDS). The calculated IC times of chl-a in ethyl acetate, tetrahydrofuran and dimethyl formamide are 141, 147, and 241 fs, respectively. The oscillation feature of the FDS results from the forward and backward transfer of the population between coupled electronic states. The effects of diabatic coupling between two electronic states on the IC time and the FDS are described. The influence of molecule-reservoir coupling on the IC time is also investigated.
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Internal Conversion Process of Chlorophyll a in Solvents in Femtosecond Pump-Probe Laser Fields

doi: 10.1088/1674-0068/21/03/211-216
Funds:  This work was supported by the National Natural Science Foundation of China (No.10674022 and No.20633070).

Abstract: The internal conversion (IC) processes of chlorophyll a (chl-a) in solvents are studied based on the reduced density matrix theory. The IC times can be obtained by simulating the experimental fluorescence depletion spectra (FDS). The calculated IC times of chl-a in ethyl acetate, tetrahydrofuran and dimethyl formamide are 141, 147, and 241 fs, respectively. The oscillation feature of the FDS results from the forward and backward transfer of the population between coupled electronic states. The effects of diabatic coupling between two electronic states on the IC time and the FDS are described. The influence of molecule-reservoir coupling on the IC time is also investigated.

Kai Niu, Li-qing Dong, Shu-lin Cong¤. Internal Conversion Process of Chlorophyll a in Solvents in Femtosecond Pump-Probe Laser Fields[J]. Chinese Journal of Chemical Physics , 2008, 21(3): 211-216. doi: 10.1088/1674-0068/21/03/211-216
Citation: Kai Niu, Li-qing Dong, Shu-lin Cong¤. Internal Conversion Process of Chlorophyll a in Solvents in Femtosecond Pump-Probe Laser Fields[J]. Chinese Journal of Chemical Physics , 2008, 21(3): 211-216. doi: 10.1088/1674-0068/21/03/211-216

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