Excited State Intramolecular Proton Transfer and Physical

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The excited state intramolecular proton transfer and physical proper-ties of 7-hydroxyquinoline are studied in various solutions and heterogeneous systems by measuring steady state and time-resolved fluorescence, reflection and NMR spectra. Proton transfer is observed only in protic solvents owing to its requirement of hydrogen-bonded solvent bridge for proton relay transfer. The activation energies of the proton transfer are 2.3 and 5.4 kj/mol in CH3OH and in CH3OD, respectively. Dimers of normal molecules are stable in microcrystalline powder form and undergo an extremely fast concerted double proton transfer upon absorption of a photon. consequently forming dimers of tautomer molecules. In the supercage of zeolite NaY, its tautomeric form is stable in the ground state and does not show any proton transfer.
Publisher
대한화학회
Issue Date
1992
Language
Korean
Citation

BULLETIN OF THE KOREAN CHEMICAL SOCIETY, v.13, pp.140 - 140

ISSN
0253-2964
URI
http://hdl.handle.net/10203/13126
Appears in Collection
CH-Journal Papers(저널논문)
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