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Internal conversion process of chlorophyll a in solvents in femtosecond pump-probe laser fields
  • ISSN号：1003-7713
  • 期刊名称：Chinese Journal of Chemical Physics
  • 时间：0
  • 页码：211-216
  • 语言：中文
  • 分类：O64[理学—物理化学;理学—化学]
  • 作者机构：[1]Department of Physics, Dalian University of Technology, Dalian 116024, China
  • 相关基金：We would like to thank Dr. Y. Shi and Professor K. L. Han for providing the FDS data and useful discussions. K. Niu is grateful to Professor V. May for enlightening suggestions. This work was supported by the National Natural Science Foundation of China （No. 10674022 and No.20633070）.
  • 相关项目：小分子在飞秒和亚飞秒脉冲强激光场中电离动力学理论研究
作者： Niu, Kai|Dong, Li-qing|Cong, Shu-lin|
关键词： 荧光亏蚀光谱, 内转换, 约化密度矩阵, 叶绿素, Fluorescence depletion spectrum, Internal conversion, Reduced density matrix
中文摘要：

叶绿素的内部变换(IC ) 过程一(chl -- 一) 基于减少的密度矩阵理论在溶剂被学习。IC 时间能被模仿试验性的荧光弄空系列(FDS ) 获得。chl 的计算 IC 时间 -- 一在里面乙醇醋酸盐， tetrahydrofuran 和 dimethyl formamide 分别地是 141， 147，和 241 fs。FDS 的摆动特征源于在联合电子状态之间的人口的前面、向后的转移。在 IC 时间和 FDS 在二个电子状态之间联合的 diabatic 的效果被描述。在 IC 时间联合的分子水库的影响也被调查。

英文摘要：

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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小分子在飞秒和亚飞秒脉冲强激光场中电离动力学理论研究
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