Fluorescence blinking of the RC-LH1 complex from Rhodopseudomonas palustris.

Fluorescence blinking of the RC-LH1 complex from Rhodopseudomonas palustris.
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来自沼泽红假单胞菌的 RC-LH1 复合物的荧光闪烁。

DOI:
10.1002/cphc.201000588
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发表时间:
2011
期刊:
Chemphyschem : a European journal of chemical physics and physical chemistry
影响因子:
--
通讯作者:
J. Köhler
J. Köhler
中科院分区:
--
文献类型:
--
作者:
S. Unterkofler;Tobias Pflock;J. Southall;R. Cogdell;J. Köhler

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我们研究了来自光合紫色细菌Rhodopyramidpalustris的单个RC-LH 1(反应中心捕光1)复合物的荧光闪烁。对于开和关时段,荧光强度的电报状的重复性遵循指数在1和2之间的幂律统计。然而,这种行为只观察到一小部分的复合物研究。我们认为,大多数的复合物驻留在一个长期的开状态,由于一种机制,这是类似于库仑阻塞在半导体量子点,这导致在这里从位于RC光激发LH 1天线后的光致电荷。
We investigate fluorescence blinking of individual RC-LH1 (reaction-centre-light-harvesting 1) complexes from the photosynthetic purple bacterium Rhodopseudomonas palustris. For both the on- and off-periods the telegraph-like intermittency of the fluorescence intensity follows power-law statistics with exponents between 1 and 2. Yet, this behaviour was only observed for a small fraction of the complexes studied. We argue that the majority of the complexes reside in a prolonged on-state, due to a mechanism that is similar to the Coulomb blockade in semiconductor quantum dots, and which results here from the photoinduced charges located within the RC upon photoexcitation of the LH1 antenna.
单杯[4]芳烃连接的苝双酰亚胺二聚体的光闪烁动力学
DOI: 10.1016/j.cplett.2009.09.096
发表时间: 2009
影响因子: 2.8
作者:
D. Ernst;R. Hildner;C. Hippius;F. Würthner;J. Köhler
通讯作者: J. Köhler