Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
9605752 | Journal of Photochemistry and Photobiology A: Chemistry | 2005 | 9 Pages |
Abstract
Absorption, fluorescence, fluorescence excitation spectra and time dependence fluorimetric studies of 1-hydroxy-9-fluorenone (1-HFu) and 1-methoxy-9-fluorenone (1-MFu) have been studied in different solvents and binary solvent mixtures. Fluorescence quantum yields (Ïf) of both the molecules increase in polar/aprotic solvents. In protic solvents Ïf of 1-HFu decreases with increase in their polarity, whereas in case of 1-MFu it increases up to ethanol and then decreases in methanol and water. Importance of inter- and intramolecular hydrogen bonding (IHB) has been studied by using binary mixtures of solvents, like trifluoroethanol (TFE)-cyclohexane and acetonitrile-water mixtures.
Keywords
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Authors
Manoj K. Nayak, S.K. Dogra,