Ultrafast energy transfer in chlorosomes from the green photosynthetic bacterium Chloroflexus aurantiacus.
Ultrafast energy transfer in chlorosomes from the green photosynthetic bacterium Chloroflexus aurantiacus.
复制标题
绿色光合细菌橙色绿屈菌叶绿体中的超快能量转移。
DOI：
10.1021/jp953734k
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发表时间：
1996
期刊：
影响因子：
--
通讯作者：
W. Struve
中科院分区：
文献类型：
--
作者：
S. Savikhin;Y. Zhu;Robert Eugene Blankenship;W. Struve
利用双色泵浦-探测实验研究了绿色细菌橙黄绿弯杆菌（Chloroflexes aurantiacus）捕光绿质体中细菌叶绿素c和a触角之间的能量传递，提高了探测灵敏度和波长多样性。BChlc-> BChla能量转移用双指数动力学很好地模拟，寿命为2-3和11 ps。它们没有表现出明显的亚皮秒分量。在一个动力学模型的上下文中，这些寿命表明，内部BChl c过程和BChl c -> BChl a能量转移步骤实质上有助于经验杆基板能量转移动力学。
Energy transfers between the bacteriochlorophyll c and a antennae in light-harvesting chlorosomes from the green bacterium Chloroflexes aurantiacus have been studied in two-color pump-probe experiments with improved sensitivity and wavelength versatility. The BChl c --> BChl a energy transfers are well simulated with biexponential kinetics, with lifetimes of 2-3 and 11 ps. They do not exhibit an appreciable subpicosecond component. In the context of a kinetic model for chlorosomes, these lifetimes suggest that both internal BChl c processes and the BChl c --> BChl a energy-transfer step contribute materially to the empirical rod-to-baseplate energy-transfer kinetics.