| Original Articles |
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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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| Cite this article: |
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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.
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| Keywords:
34.30.+h
42.65.Re
78.47.+p
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Published: 01 April 2001
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