Abstract
A detailed experimental and theoretical examination of electronic excited state transport in the finite volume system, octadecyl rhodamine B molecules in triton X-100 micelles, is presented. Picosecond fluorescence mixing and transient grating techniques were used to examine systems in which the average number of chromophores per micelle ranged from 0.1 to 11. Because of the clustering of chromophores in the small micelles, the energy transport observed is extremely efficient. A statistical mechanical theory, based on a density expansion with a Padé approximant, is developed for donor–donor transport on a spherical surface. This theory accurately accounts for the experimental data with only the micelle radius as an adjustable parameter. The radius obtained from this procedure is in good agreement with determinations by other methods. This demonstrates that quantitative information about the spatial extent of chromophore distributions in small volumes can be obtained when appropriate finite volume energy transport theories are employed. It is shown that theories developed for infinite volumes are not applicable to systems such as the ones considered here. Finally the partitioning of rhodamine B and octadecyl rhodamine B between aqueous and micellar phases is measured, and lifetimes and rotation times are reported.
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Dates
Type | When |
---|---|
Created | 22 years, 6 months ago (Feb. 28, 2003, 12:18 p.m.) |
Deposited | 1 year, 6 months ago (Feb. 9, 2024, 8:50 p.m.) |
Indexed | 1 month, 4 weeks ago (July 1, 2025, 6:30 a.m.) |
Issued | 41 years, 6 months ago (Feb. 1, 1984) |
Published | 41 years, 6 months ago (Feb. 1, 1984) |
Published Print | 41 years, 6 months ago (Feb. 1, 1984) |
@article{Ediger_1984, title={Picosecond studies of excitation transport in a finite volume: The clustered transport system octadecyl rhodamine B in triton X-100 micelles}, volume={80}, ISSN={1089-7690}, url={http://dx.doi.org/10.1063/1.446802}, DOI={10.1063/1.446802}, number={3}, journal={The Journal of Chemical Physics}, publisher={AIP Publishing}, author={Ediger, M. D. and Domingue, R. P. and Fayer, M. D.}, year={1984}, month=feb, pages={1246–1253} }