1993 Fiscal Year Final Research Report Summary
Synthetic Approach Toward Photosynthetic Reaction Center and Study on Physical Properties of Photosynthetic Models
| Project/Area Number |
02102005
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| Research Category |
Grant-in-Aid for Specially Promoted Research
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| Allocation Type | Single-year Grants |
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| Research Institution | Fukui University of Technology (1993)
Kyoto University (1990-1992) |
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Principal Investigator |
MARUYAMA Kazuhiro Fukui University of Technology, Faculty of Technology, Professor, 工学部, 教授 (90025263)
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| Co-Investigator(Kenkyū-buntansha) |
OSUKA Atsuhiro Kyoto University, Faculty of Science, Department of Chemistry, Associate Profess, 理学部, 助教授 (80127886)
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| Project Period (FY) |
1990 – 1993
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| Keywords | Photosynthetic Reaction Center / Porphyrin / Chlorophyll / Carotenoids / Pyromellitimide / Electron Transfer / Excitation Energy Transfer / Long-lived Charge Separated States |
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| Research Abstract |
On the basis of our new synthetic methods, a variety of oligomeric porphyrin arrays designed for artificial photosynthetic reaction center have been prepared and the following results have been revealed through careful examination of their photoexcited dynamics in a time range of several picoseconds to several microseconds, 1) elucidation of key factors which govern rates of intra-porphyrin electron transfer reactions, 2) elucidation of key factors which govern rates of porphyrin-electron acceptor, 3) achievement of long-lived charge separated states, 4) elucidation of electronic interactions between carotenoids and porphyrin and related pigments in their excited states, 5) achievement of long-distance electron transfer aided by superexchange interactions between electron donors and acceptors, and 6) development of a photosynthetic model which well duplicates the whole photochemical events in natural photosynthetic reaction center. Through these studies, we have succeeded in opening of new aspects of "chemical approach toward photosynthetic reaction center".
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