Strategies to enhance the excitation energy-transfer efficiency in a light-harvesting system using the intra-molecular charge transfer character of carotenoids
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- Nao Yukihira
- Department of Applied Chemistry for Environment
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- Yuko Sugai
- Department of Applied Chemistry for Environment
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- Masazumi Fujiwara
- Department of Applied Chemistry for Environment
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- Daisuke Kosumi
- Institute of Pulsed Power Science
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- Masahiko Iha
- South Product Co. Ltd.
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- Kazuhiko Sakaguchi
- Department of Chemistry
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- Shigeo Katsumura
- Department of Chemistry
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- Alastair T. Gardiner
- Glasgow Biomedical Research Centre
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- Richard J. Cogdell
- Glasgow Biomedical Research Centre
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- Hideki Hashimoto
- Department of Applied Chemistry for Environment
書誌事項
- 公開日
- 2017
- 資源種別
- journal article
- DOI
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- 10.1039/c6fd00211k
- 公開者
- Royal Society of Chemistry (RSC)
この論文をさがす
説明
<p>Fucoxanthin is a carotenoid that is mainly found in light-harvesting complexes from brown algae and diatoms. Due to the presence of a carbonyl group attached to polyene chains in polar environments, excitation produces an excited intra-molecular charge transfer. This intra-molecular charge transfer state plays a key role in the highly efficient (∼95%) energy-transfer from fucoxanthin to chlorophyll<italic>a</italic>in the light-harvesting complexes from brown algae. In purple bacterial light-harvesting systems the efficiency of excitation energy-transfer from carotenoids to bacteriochlorophylls depends on the extent of conjugation of the carotenoids. In this study we were successful, for the first time, in incorporating fucoxanthin into a light-harvesting complex 1 from the purple photosynthetic bacterium,<italic>Rhodospirillum rubrum</italic>G9+ (a carotenoidless strain). Femtosecond pump-probe spectroscopy was applied to this reconstituted light-harvesting complex in order to determine the efficiency of excitation energy-transfer from fucoxanthin to bacteriochlorophyll<italic>a</italic>when they are bound to the light-harvesting 1 apo-proteins.</p>
収録刊行物
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- Faraday Discussions
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Faraday Discussions 198 59-71, 2017
Royal Society of Chemistry (RSC)
