We present theoretical analyses of two different aspects ofthe time dependence of the fluorescence Stokes shift in polar liquids. We show that a small deviation from the Debye form for the dielectric relaxation of the solvent can strongly influence the time evolution of the Stokes shift. Using the D
Time dependence of the relaxation parameters in non-Debye solvents
β Scribed by W.Ronald Fawcett
- Publisher
- Elsevier Science
- Year
- 1992
- Tongue
- English
- Weight
- 600 KB
- Volume
- 199
- Category
- Article
- ISSN
- 0009-2614
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β¦ Synopsis
Expressions for the time dependence of the longitudinal relaxation parameter for' solvents exhibiting two and three Debye relaxation processes are developed on the basis of the model of Hynes. These expressions are applied to dielectric relaxation data for the lower alcohols, the amides and other solvents which have been studied over a wide frequency range. The significance of the results obtained is discussed with respect to data for time-resolved fluorescence spectroscopy recently reported in the literature.
π SIMILAR VOLUMES
To assess the importance of the different time scales of non-Debye solvent relaxation on the reaction kinetics of electron transfer reactions we have performed a numerical simulation study for a model system of an activated solvent-controlled electron transfer reaction in the weakly adiabatic regime
The "C spin-lattice relaxation times and nuclear Overhauser enhancements of protonated carbons in 1,3,5tribromobenzene were measured in a number of solvents of widely varying viscosity. Derived reorientational correlation times were found to increase approximately linearly with solution viscosity, a