| 叶绿素a、b分子体系激子相干迁移的时间特性 |
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| 引用本文： | 马英忠 唐树延. 叶绿素a、b分子体系激子相干迁移的时间特性[J]. 发光学报, 1992, 13(1): 75-79 |
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| 作者姓名： | 马英忠 唐树延 |
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| 作者单位： | 中国科学院长春物理研究所, 长春 130021 |
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| 摘 要： | 本文利用激发能传递的广义主方程理论和光谱实验结果,首次研究了相同和相异叶绿素分子体系的激子相干迁移的时间特性.Chla分子间的相干时间为350fs,Chlb分子间为160fs,Chla与Chlb分子间为200fs.主要叶绿素分子间的激子相干迁移属弛豫前转移过程.并分析了该迁移的作用及影响相干时间长短的主要因素.
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| 关 键 词： | 叶绿素 激子 相干迁移 相干时间 |
TIME CHARACTERISTICS OF EXCITON COHERENT TRANSPORT IN MOLECULAR AGGREGATES OF CHLOROPHYLL A AND CHLOROPHYLL B |
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| Ma Yingzhong,Tang Shuyan. TIME CHARACTERISTICS OF EXCITON COHERENT TRANSPORT IN MOLECULAR AGGREGATES OF CHLOROPHYLL A AND CHLOROPHYLL B[J]. Chinese Journal of Luminescence, 1992, 13(1): 75-79 |
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| Authors: | Ma Yingzhong Tang Shuyan |
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| Affiliation: | Changchun Institute of physics, Academia Sinica, Changchun 130021 |
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| Abstract: | The generalized-master-cquation(GME) theory of excitation transfer and optical spectra were adopted to investigate the time characteristics of sxciton coherent transport in the molecular aggregates of identical and different chlorophylls for the first time. A coherent time of 200 fs was derived based on its memory function calculation for the transport be-tween chlorophyll a and chlorophyll b, and the results for chlorophyll a and chlorophyll b in solution were 350 fs and 160 fs, respectively. The exciton coherent transport in above aggregates is analysed to be a transfer before vibrational relaxation process. The effects of coherence on excitation transfer and some major factors affecting coherent time are also discussed. |
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