Internal Conversion Process of Chlorophyll a in Solvents in Femtosecond Pump-Probe Laser Fields |
| |
| Institution: | Department of Physics, Dalian University of Technology, Dalian 116024, China;Department of Physics, Dalian University of Technology, Dalian 116024, China;Department of Physics, Dalian University of Technology, Dalian 116024, China |
| |
| 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. |
| |
| Keywords: | Fluorescence depletion spectrum Internal conversion Reduced density matrix |
|
| 点击此处可从《化学物理学报》浏览原始摘要信息 |
| 点击此处可从《化学物理学报》下载免费的PDF全文 |
|
