Chin. Phys. Lett.  2001, Vol. 18 Issue (4): 522-524    DOI:
Original Articles |
Energy Transfer Pathways in Reaction Center upon Femtosecond Excitation of Accessory Bacteriochlorophylls
GUO Li-Jun1;MA Guo-Hong1;ZOU Yong-Long2;XU Chun-He2;LIU Ye1;MI Jun1;QIAN Shi-Xiong1;LIU Jian-Hua1
1Department of Physics, Fudan University, Shanghai 200433 2Shanghai Institute of Plant Physiology, Chinese Academy of Sciences, Shanghai 200032
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GUO Li-Jun, MA Guo-Hong, ZOU Yong-Long et al  2001 Chin. Phys. Lett. 18 522-524
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Abstract The energy transfer pathways from the excited accessory
bacteriochlorophylls (B*) within native and modified (pheophytin-exchanged) reaction center isolated from Rhodobacter
sphaeroides (RS601) have been investigated by using the femtosecond pump-probe technique. For native RS601, B* decays with time constant of 240 fs, followed by a partial recovery of the ground state bleaching with time scale of about 2 ps. In modified RS601(Phe), however, B* decays with time constant of 800 fs for magic angle (54.7°) polarization configuration. In addition to the general assumption of energy transfer pathway from B* to the special pair P, an alternative pathway for energy transfer probably operates as well.

Keywords: 34.30.+h      42.65.Re      78.47.+p     
Published: 01 April 2001
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/Y2001/V18/I4/0522
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GUO Li-Jun
MA Guo-Hong
ZOU Yong-Long
XU Chun-He
LIU Ye
MI Jun
QIAN Shi-Xiong
LIU Jian-Hua
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