Femtosecond Dynamics of Energy Transfer in Native B800-B850
and B800-Released LH2 Complexes of Rhodobacter Sphaeroides

Chin. Phys. Lett.

2003, Vol. 20

Issue (12): 2148-2151 DOI:

Original Articles

Femtosecond Dynamics of Energy Transfer in Native B800-B850 and B800-Released LH2 Complexes of Rhodobacter Sphaeroides

LIU Wei-Min^1,2;ZHU Rong-Yi^1,2;XIA Chen-An¹;LIU Yuan³;XU Chun-He³;QIAN Shi-Xiong¹

¹Department of Physics, Fudan University, Shanghai 200433 ²National Key Laboratory of Surface Science, Fudan University, Shanghai 200433 ³Shanghai Institute of Plant Physiology and Ecology, Shanghai Institute for Biological Sciences, Chinese Academy of Sciences, Shanghai 200032

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LIU Wei-Min, ZHU Rong-Yi, XIA Chen-An et al 2003 Chin. Phys. Lett. 20 2148-2151

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Abstract Two kinds of antenna complexes LH2 of Rhodobacter sphaeroides, wild type RS601 and the removal of B800 pigments (B800 released), were used in our experiment. These two LH2 complexes show quite different behaviour in absorption and femtosecond dynamics. By using the femtosecond pump-probe technique, the energy transfer processes occurred in two complexes were studied. Because of removing the B800 pigment from the LH2 in B800-released LH2 complex, the energy transfer between the B800 to B850 pigment was completely eliminated, while the pure internal energy transfer within the exciton states of B850 pigment could be carefully investigated. The results show that, at B800 absorption band, B800-released LH2 obviously shows a dominated transient absorption different from the photobleaching observed in RS601; while at the B850 band, these two complexes show similar photobleaching behaviour.

Keywords: 34.30.+h 42.65.Re 78.47.+p

Published: 01 December 2003

PACS:	34.30.+h
	42.65.Re	(Ultrafast processes; optical pulse generation and pulse compression)
	78.47.+p

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https://cpl.iphy.ac.cn/ OR https://cpl.iphy.ac.cn/Y2003/V20/I12/02148

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	LIU Wei-Min
	ZHU Rong-Yi
	XIA Chen-An
	LIU Yuan
	XU Chun-He
	QIAN Shi-Xiong

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