Real time observations of vibronic interactions between pigments in photosynthetic light-harvesting antennas
| Project/Area Number |
25707028
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| Research Category |
Grant-in-Aid for Young Scientists (A)
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| Allocation Type | Partial Multi-year Fund |
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| Research Field |
Condensed matter physics I
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| Research Institution | Kumamoto University (2015)
Osaka City University |
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Principal Investigator |
Daisuke Kosumi 熊本大学, パルスパワー科学研究所, 准教授 (70613149)
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| Project Period (FY) |
2013-04-01 – 2016-03-31
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| Project Status |
Completed (Fiscal Year 2015)
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| Budget Amount *help |
¥23,270,000 (Direct Cost: ¥17,900,000、Indirect Cost: ¥5,370,000)
Fiscal Year 2015: ¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2014: ¥7,670,000 (Direct Cost: ¥5,900,000、Indirect Cost: ¥1,770,000)
Fiscal Year 2013: ¥11,310,000 (Direct Cost: ¥8,700,000、Indirect Cost: ¥2,610,000)
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| Keywords | 超高速分光 / 光物性 / 光合成 / エネルギー伝達 / 非線形分光 / 非線形光学 |
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| Outline of Final Research Achievements |
We developed extremely short 5 fs optical pulses and ultrafast coherent spectroscopic techniques to clarify ultrafast energy transfer dynamics of purple bacterial photosynthetic antennas. Quantum beats signals originated from electronic coherence between the B800 and B850 molecular assemblies in photosynthetic antenna LH2 were clearly observed by means of 5 fs coherent spectroscopic measurements. A Fourier analysis of the quantum beats signals shows that multi-modes electronic coherences are formed between B800 and B850. The results suggest that the multi-mode coherences play roles in highly efficient energy transfer of purple bacterial photosynthesis.
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Report
(4 results)
Research Products
(65 results)
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[Journal Article] Direct Observation of Hole Shift and Characterization of Spin States in Radical Ion Pairs Generated from Photoinduced Electron Transfer of (Phenothiazine)n-Anthraquinone (n = 1, 3) Dyads2014
Author(s)
Karimata, A.; Suzuki, S.; Kozaki, M.; Kimoto, K.; Nozaki, K.; Matsushita, H.; Ikeda, N.; Akiyama, K.; Kosumi, D.; Hashimoto, H.; Okada, K.
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Journal Title
J. Phys. Chem. A
Volume: 118
Issue: 47
Pages: 11262-11271
DOI
Related Report
Peer Reviewed
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