The electronically excited states of LH2 complexes from Rhodopseudomonas acidophila strain 10050 studied by time-resolved spectroscopy and dynamic Monte Carlo simulations. II. Homo-arrays of LH2 complexes reconstituted into phospholipid model membranes.

The electronically excited states of LH2 complexes from Rhodopseudomonas acidophila strain 10050 studied by time-resolved spectroscopy and dynamic Monte Carlo simulations. II. Homo-arrays of LH2 complexes reconstituted into phospholipid model membranes.
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通过时间分辨光谱和动态蒙特卡罗模拟研究了嗜酸红假单胞菌菌株 10050 的 LH2 复合物的电子激发态。

DOI:
10.1021/jp2023583
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发表时间:
2011
期刊:
The journal of physical chemistry. B
影响因子:
--
通讯作者:
J. Köhler
J. Köhler
中科院分区:
--
文献类型:
--
作者:
Tobias Pflock;S. Oellerich;Lisa Krapf;J. Southall;R. Cogdell;G. Matthias Ullmann;J. Köhler

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我们对光合紫色细菌嗜酸红单胞菌的LH2络合物进行了时间分辨光谱分析。监测荧光瞬态的变化,作为激发通量和激发重复率的函数。这些参数与阵列内的激发密度和在下一次激发之前仍然携带三重态的LH2配合物的数量直接相关。对LH2配合物模型簇的实验观测结果与动态蒙特卡罗模拟结果进行了比较,结果在不需要任何自由参数的情况下得到了定性的一致,并揭示了能量转移和湮灭过程之间的相互关系。
We performed time-resolved spectroscopy on homoarrays of LH2 complexes from the photosynthetic purple bacterium Rhodopseudomonas acidophila. Variations of the fluorescence transients were monitored as a function of the excitation fluence and the repetition rate of the excitation. These parameters are directly related to the excitation density within the array and to the number of LH2 complexes that still carry a triplet state prior to the next excitation. Comparison of the experimental observations with results from dynamic Monte Carlo simulations for a model cluster of LH2 complexes yields qualitative agreement without the need for any free parameter and reveals the mutual relationship between energy transfer and annihilation processes.
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