Nonlinear annihilation of excitations in photosynthetic systems.
Nonlinear annihilation of excitations in photosynthetic systems.
复制标题
DOI：
10.1016/s0006-3495(95)79986-6
复制
发表时间：
1995-09
影响因子：
3.4
通讯作者：
L. Valkunas;G. Trinkunas;V. Liuolia;R. van Grondelle
中科院分区：
文献类型：
--
作者：
L. Valkunas;G. Trinkunas;V. Liuolia;R. van Grondelle
进一步发展了准均匀光合天线系统中的单重态-单重态湮灭理论。在新模型中，考虑了以下重要贡献：1）有限的激发脉冲宽度，2）湮灭过程中高激发态的占据，3）激发关联效应，4）局部加热效应。主要的重点是集中在泵探测动力学测量的分析，证明上述前两个可能的贡献。与低强度荧光动力学测量得到的结果的差异突出显示。在此理论基础上，讨论了室温下光合细菌红杜鹃的皮秒时间分辨实验数据。
The theory of the singlet-singlet annihilation in quasi-homogeneous photosynthetic antenna systems is developed further. In the new model, the following important contributions are taken into account: 1) the finite excitation pulse duration, 2) the occupation of higher excited states during the annihilation, 3) excitation correlation effects, and 4) the effect of local heating. The main emphasis is concentrated on the analysis of pump-probe kinetic measurements demonstrating the first two above possible contributions. The difference with the results obtained from low-intensity fluorescence kinetic measurements is highlighted. The experimental data with picosecond time resolution obtained for the photosynthetic bacterium Rhodospirillum rubrum at room temperature are discussed on the basis of this theory.