Abstract
Time-correlated single photon counting was used to monitor fluorescence concentration depolarization for DODCI in glycerol. For DODCI concentrations below ∼10−3 M, the present experiments have minimized self-absorption and excitation trapping artifacts to the extent where they contribute negligibly to the observed differences between experimental fluorescence profiles and profiles computed from the Gochanour–Andersen–Fayer three-body theory for excitation transport in solution. The three-body theory accurately describes fluorescence depolarization at the lower dye concentrations. At higher concentrations, the measured decay in Gs(t), the probability that the excitation resides on the laser-excited molecule, is perceptibly slower than predicted by the three-body theory. This deviation may arise from nonrandom dye distributions in solution, rather than from errors in the three-body theory. The experimental decay is equally well described at all concentrations by an earlier analytic theory which was developed by Huber, Hamilton, and Barnett.
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Dates
Type | When |
---|---|
Created | 23 years, 1 month ago (July 26, 2002, 9:10 a.m.) |
Deposited | 1 year, 6 months ago (Feb. 10, 2024, 12:58 a.m.) |
Indexed | 1 year, 6 months ago (Feb. 10, 2024, 10:03 a.m.) |
Issued | 38 years, 6 months ago (March 1, 1987) |
Published | 38 years, 6 months ago (March 1, 1987) |
Published Print | 38 years, 6 months ago (March 1, 1987) |
@article{Hart_1987, title={Excitation transport in solution: A quantitative comparison between GAF theory and time-resolved fluorescence profiles}, volume={86}, ISSN={1089-7690}, url={http://dx.doi.org/10.1063/1.452072}, DOI={10.1063/1.452072}, number={5}, journal={The Journal of Chemical Physics}, publisher={AIP Publishing}, author={Hart, David E. and Anfinrud, Philip A. and Struve, Walter S.}, year={1987}, month=mar, pages={2689–2696} }