2005 Fiscal Year Final Research Report Summary
EFFECTS OF SOLVENT VISCOSITY ON PHOTOINDUCED ELECTRON TRANSFER REACTIONS
| Project/Area Number |
16550020
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Physical chemistry
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| Research Institution | KITASATO UNIVERSITY |
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Principal Investigator |
KIKUCHI Koichi KITASATO UNIVERSITY, PHYSICS, PROFESSOR, 理学部, 教授 (10004433)
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| Co-Investigator(Kenkyū-buntansha) |
INADA Taeko KITASATO UNIVERSITY, PHYSICS, LECTURER, 理学部, 講師 (60286375)
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| Project Period (FY) |
2004 – 2005
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| Keywords | INTERMOLECULAR ELECTRON TRANSFER / FLUORESCENCE QUENCHING / EXCITED STATE / VISCOSITY EFFECT / ETHYLENE GLYCOL / METAL ION |
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| Research Abstract |
The electron-transfer (ET) fluorescence quenching of aromatic molecule and the back ET within the geminate radical ion pairs were studied in a viscous solvent (ethylene glycol) using aromatic molecules and trivalent lanthanide ions as quenchers. The present results were compared with the previous results obtained in a non-viscous solvent (acetonitrile) to make clear the effects of solvent viscosity on the ET fluorescence quenching and back ET. It was found that the rate of ET depends on the solvent viscosity only through the diffusion coefficients of electron donor and acceptor, and hence, the free energy dependence of fluorescence quenching mechanism is not affected by the solvent viscosity.
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