1994 Fiscal Year Final Research Report Summary
Excited-State Electron Transfer in Size-Selected Moleclar Cluster
| Project/Area Number |
05453018
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| Research Category |
Grant-in-Aid for General Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
Physical chemistry
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| Research Institution | Kanazawa University |
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Principal Investigator |
ITOH Michiya Kanazawa University, 薬学部, 教授 (30012610)
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| Co-Investigator(Kenkyū-buntansha) |
KOHTANI Shigeru Kanazawa University, 薬学部, 教務職員 (00242529)
ITOH Michiya Kanazawa University (30012610)
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| Project Period (FY) |
1988 – 1994
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| Keywords | Supersonic Jet / Hole Burning / Excited-State Interaction / Exciplex / Proton Transfer / Cluster |
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| Research Abstract |
1)In supersonic free jet, molecules can be in cooled and isolated molecular condition, which can exhibit inherent characters of molecules different from those in solution. Some intramolecular hydrogen bonding systems show the excited state proton transfer (ESPT) in the singlet excited state of molecule. This projet presents nanosecond fluorescence studies of the intramoecular ESPT in 3-hydroxyflavone and related complounds and in their solvent clusters in supersonic expansion.
2)Intramolecular exciplex formation in the jet-cooled bichromophoric electron donor-acceptor systems is distinguishable from the intermolecular exciplex in supersonic expansion. The present persistent hole burning depletion spectra have demonstrated that the multi-conformations are involved in these bichromophoric EDA systems as well as intermolecular vdW complex. The different ground-state conformations were observed to exhibit the different excess vibrational energy dependence of the exciplex formation.
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