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Energy Transfer in Isolated LHC II Studied by Femtosecond Pump-Probe Technique |
| YANG Yi1,2;GUO Li-Jun1,2;LIU Yuan3;LIU Wei-Min1,2;ZHU Rong-Yi1,2;QIAN Shi-Xiong1;XU Chun-He3 |
| 1Department of Physics, Fudan University, Shanghai 200433
2National Key Laboratory of Surface Physics, Fudan University, Shanghai 200433
3Shanghai Institute of Plant Physiology, Chinese Academy of Sciences, Shanghai 200032 |
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| Cite this article: |
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YANG Yi, GUO Li-Jun, LIU Yuan et al 2003 Chin. Phys. Lett. 20 589-592 |
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Abstract Excitation energy transfer in the isolated light-harvesting chlorophyll (Chl)-a/b protein complex of photosystem II (LHC II) was studied by the one-colour pump-probe technique with femtosecond time resolution. After exciting Chl b by 638 nm beam, the dynamic behaviour shows that the ultrafast energy transfer from Chl-b at positions of B2, B3, and B5 to the corresponding Chl-a molecules in monomeric subunit of LHC II is in the time scale of 230 fs. While with the excitation of Chl a at 678 nm, the energy transfer between excitons of Chl-a molecules has the lifetime of about 370 fs, and two other slow decay components are due to the energy transfer between different Chl-a molecules in a monomeric subunit of LHC II or in different subunits, or due to change of molecular conformation.
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| Keywords:
34.30.+h
42.65.Re
78.47.+p
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Published: 01 April 2003
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