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Please use this identifier to cite or link to this item: http://hdl.handle.net/1959.14/40094
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- Title
- Carotenoid to chlorophyll energy transfer in the peridinin-chlorophyll-a-protein complex involves an intramolecular charge transfer state
- Related
- Proceedings of the National Academy of Sciences of the United States of America, Vol. 99, Issue 26, p.16760-16765
- DOI
- 10.1073/pnas.262537599
- Publisher
- National Academy of Sciences
- Date
- 2002
- Author/Creator
- Zigmantas, Donatas
- Author/Creator
- Hiller, Roger G
- Author/Creator
- Sundstrom, Villy
- Author/Creator
- Polivka, Tomáš
- Description
- Carotenoids are, along with chlorophylls, crucial pigments involved in light-harvesting processes in photosynthetic organisms. Details of carotenoid to chlorophyll energy transfer mechanisms and their dependence on structural variability of carotenoids are as yet poorly understood. Here, we employ femtosecond transient absorption spectroscopy to reveal energy transfer pathways in the peridinin–chlorophyll-a–protein (PCP) complex containing the highly substituted carotenoid peridinin, which includes an intramolecular charge transfer (ICT) state in its excited state manifold. Extending the transient absorption spectra toward near-infrared region (600–1800 nm) allowed us to separate contributions from different low-lying excited states of peridinin. The results demonstrate a special light-harvesting strategy in the PCP complex that uses the ICT state of peridinin to enhance energy transfer efficiency.
- Description
- 6 page(s)
- Subject Keyword
- 030502 Natural Products Chemistry
- Subject Keyword
- 030606 Structural Chemistry and Spectroscopy
- Resource Type
- journal article
- Organisation
- Macquarie University. Dept. of Biological Sciences
- Identifier
- http://hdl.handle.net/1959.14/40094
- Identifier
- ISSN:1091-6490
- Identifier
- mq-rm-2002014882
- Language
- eng
- Reviewed
Macquarie University ResearchOnline
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