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• W2069921096 abstract "The direct and sensitized photoisomerizations of 1-styrylisoquinoline and of its protonated form have been studied in solvents of different polarity and hydrogen-bonding characteristics. The results obtained show that trans-1-styrylisoquinoline does not fluoresce at room temperature and that it photoisomerizes under direct excitation with very low quantum yield. This lack of reactivity is attributed to an intramolecular hydrogen bond which constrains the excited molecule in a distorted transoid conformation. In alcoholic solvents, competition with intermolecular hydrogen bonding weakens the intramolecular hydrogen bond and allows an increase of the photoisomerization. The cis isomer and the protonated forms, for which such intramolecular hydrogen bonding is not possible, have good isomerization yields in all the solvents studied." @default.
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• W2069921096 date "1988-06-01" @default.
• W2069921096 modified "2023-09-30" @default.
• W2069921096 title "Solvent dependence of the excited state reactivity of 1-styrylisoquinoline" @default.
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• W2069921096 doi "https://doi.org/10.1016/1010-6030(88)80026-1" @default.
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