| | 1 | Author
| HansE. Wilhelm, Horst Gebert, Wolfgang Regenstein | Requires cookie* | | | Title
| Effect of Substituents on the Viscosity Dependence of Fluorescence and on the S l -T l Energy Gap of Donor-Acceptor Substituted Trans-Stilbenes  | | | | Abstract
| The dependence of fluorescence quantum yields and Sj-lifetimes of donor-acceptor substituted trans-stilbenes on temperature was measured in the temperature range from 298 to 100 K, using solutions of stilbenes in 3-methylpentane (3-MP). Measurements of fluorescence and phosphores-cence spectra show that the triplet energy is almost independent of the acceptor. The S[-energy and the S r Ti energy gap decrease with increasing acceptor strength. For all compounds intersystem crossing (ISC) S, —» T, is negligible. | | | |
Reference
| Z. Naturforsch. 52a, 837—842 (1997); received November 18 1997 | | | |
Published
| 1997 | | | |
Keywords
| Stilbenes, Fluorescence, Phosphorescence, Singlet-Triplet Energy Gap, Rate Constants | | | |
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| default:Reihe_A/52/ZNA-1997-52a-0837.pdf | | | | Identifier
| ZNA-1997-52a-0837 | | | | Volume
| 52 | |
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