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Effect of Photo-Oxidation on Energy Transfer in Light Harvesting Complex (LH2) from Rhodobacter Sphaeroides 601 |
| LIU Kang-Jun1,2;LIU Wei-Min1;YAN Yong-Li1;DONG Zhi-Wei1;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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| Cite this article: |
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LIU Kang-Jun, LIU Wei-Min, YAN Yong-Li et al 2006 Chin. Phys. Lett. 23 2598-2601 |
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Abstract We study the photo-oxidation of bacteriochlorophylls (BChls) in peripheral light harvesting complexes (LH2) from rhodobacter sphaeroides by using the steady absorption and the femtosecond pump--probe measurement, to realize the detailed dynamics of LH2 in the presence of photo-oxidation. The experimental results reveal that BChl-B850 radical cations may act as an additional channel to compete with the unoxidized BChl-B850 molecules for rapidly releasing the excitation energy, while the B800→B850 energy transfer rate is almost unaffected in the oxidation process.
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| Keywords:
82.50.Nd
87.14.-g
82.53.Ps
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Published: 01 September 2006
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| PACS: |
82.50.Nd
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(Control of photochemical reactions)
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87.14.-g
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(Biomolecules: types)
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82.53.Ps
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(Femtosecond probing of biological molecules)
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