| | 1 | Author
| Sn Bakalova, L. Biczók, T. Bérces | Requires cookie* | | | Title
| Photophysical and Photochemical Properties of 2,3-Dihydro-4(l H)- quinolinones. Part II. Rates and Mechanism of Primary Processes  | | | | Abstract
| Fluorescence quantum yields, singlet lifetimes and triplet yields for 2-methyl-2,3-dihydro-4(1 H)-quinolinone and N -m ethyl-2,3-dihydro-4(l H)-quinolinone were determined as a func tion o f temperature. In non-polar solvents, an efficient non-radiative process identified as an indirect singlet —* • triplet transition occurring through S2(n,jr*) was found to depopulate the lowest S 1(7t,7E*) state. In polar solvents, direct singlet —> triplet intersystem crossing appears to dominate. Photochemical dehydrogenation produced the corresponding 4(1 H)-quinolinone with a yield o f few times 10"2. This was shown to be the only traceable reaction route. | | | |
Reference
| Z. Naturforsch. 46c, 549 (1991); received March 16/A pril4 1991 | | | |
Published
| 1991 | | | |
Keywords
| Dihydroquinolinones, Triplet Yields, Fluorescence Quantum Yields, Photochemical D ehy drogenation, Singlet Lifetimes | | | |
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| default:Reihe_C/46/ZNC-1991-46c-0549.pdf | | | | Identifier
| ZNC-1991-46c-0549 | | | | Volume
| 46 | |
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