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.
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.
出处
《发光学报》
EI
CAS
CSCD
北大核心
1992年第1期75-79,共5页
Chinese Journal of Luminescence
基金
国家自然科学基金
