报告题目：Enhancement or optimization of energy-transfer from carotenoid to chlorophyll in photosynthetic antennas

报告人单位： Kwansei Gakuin Univ.

报告人：Prof. Dr. Hideki Hashimoto

报告时间：2018年9月25日9:00-11:00

报告地点：必赢电子游戏网站中心校区唐敖庆楼D311会议室

报告简介：

Carotenoids are bound to both peripheral light-harvesting (LH) 2 and LH1 ‘core’ pigment-protein complexes in purple photosynthetic bacteria. In these complexes carotenoids serve as additional light harvesting pigments that capture the energy in the blue-green spectral region of the solar spectrum and transfer this energy to bacteriochlorophylls. Singlet-singlet excitation energy-transfer (EET) is involved in this process. The efficiency of EET from carotenoid to bacteriochlorophyll in the LH complexes depends on the number of conjugated C=C double bonds (n) present within the carotenoid. In purple bacterial light-harvesting systems the efficiency of excitation energy-transfer from carotenoid to bacteriochlorophyll depends on the extent of conjugation of the carotenoids. However, this feature is able to be modified by incorporating carbonyl containing carotenoids into the light-harvesting system from purple photosynthetic bacteria. In this talk, I would like to discuss how natural photosynthetic antennas optimize the energy flow from carotenoid to chlorophyll. This discussion is further extended to highlight strategies to enhance the efficiency of energy-transfer from carotenoid to chlorophyll in artificial photosynthetic antennas.

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