Exciton scattering in light-harvesting systems of purple bacteria
Exciton scattering in light-harvesting systems of purple bacteria
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DOI：
10.1016/s0022-2313(01)00334-9
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发表时间：
2001-12-01
影响因子：
3.6
通讯作者：
Schreiber, M
中科院分区：
文献类型：
--
作者：
Herman, P;Kleinekathöfer, U;Schreiber, M
利用简化密度矩阵的形式计算了紫色细菌光收集系统中的激子散射。在这项工作中考虑了静态失序（场地能量的波动）和动态失序（耗散）。研究了18种色素的圆形聚集体，以模拟LH2配合物中细菌叶绿素的B850环。结果表明，在模拟随时间变化的荧光各向异性时，耗散的影响是不可忽视的。此外，环的椭圆变形可能是必不可少的。(C) 2001 Elsevier Science B.V.版权所有
Using the reduced density matrix formalism the exciton scattering in light-harvesting systems of purple bacteria is calculated. Static disorder (fluctuations of the site energies) as well as dynamic disorder (dissipation) is taken into account in this work. Circular aggregates with 18 pigments are studied to model the B850 ring of bacteriochlorophylls within LH2 complexes. It can be shown that the influence of dissipation may not be neglected in the simulation of the time-dependent anisotropy of fluorescence. Also an elliptical deformation of the ring could be essential. (C) 2001 Elsevier Science B.V. Ail rights reserved.