EPJ Web of Conferences
Volume 41, 2013XVIIIth International Conference on Ultrafast Phenomena
|Number of page(s)||3|
|Section||Molecular Light Harvesting and Charge-Transfer Complexes|
|Published online||13 March 2013|
B-side Electron Transfer in Bacterial Photosynthetic Reaction Centers Revealed by a Few-Cycle Pulse Laser
1 Advanced Ultrafast Laser Research Center, University of Electro-Communications, 1-5-1 Chofugaoka, Chofu, Tokyo 182-8585 Japan
2 JST, CREST, 5 Sanbancho, Chiyoda-ku, Tokyo 102-0075 Japan
3 Department of Electrophysics, National Chiao-Tung University, 1001 Ta Hsueh Rd., Hsinchu 300 Taiwan
4 Institute of Laser Engineering, Osaka University, 2-6 Yamada-oka, Suita, Osaka 565-0971 Japan
5 Department of Pharmacy, Ritsumeikan University, Kusatsu, Shiga 525-8577 Japan
B-side electron transfer in wide-type reaction centers from Rhodobacter sphaeroides 2.4.1 was investigated by broadband real-time vibrational spectroscopy. HB− was found to be generated in less than 50 fs after the excitation of 6.3 fs laser pulse, and its decay lifetime was determined to be ~280fs and 1.4ps, which is extremely fast compared with the one occurring in A-side. Considering the ultrafast of the generation time of HB−, BB rather than P was found to be the initial electron donor to the H. Hence, the initial charge-separated state is determined to be BB+HB− state.
© Owned by the authors, published by EDP Sciences, 2013
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 2.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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