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Proceedings Paper

Role Of Torsional Dynamics In The Photophysics Of Xanthene Dyes
Author(s): Kelly G Casey; Edward L Quitevis
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Paper Abstract

Fluorescence lifetime data for rhodamine B in a series of normal alcohols have been measured as a function of-temperature, solvent polarity, and viscosity. Nonradiative rates for internal conversion have been extracted from this data. The solvent dependence of the nonradiative rates is discussed in terms of two activated barrier crossing models. In one model the activation energy is a linear function of the solvent polarity parameter ET(30). In another mode , the solvent dependence of the nonradiative rate is taken into ''t3- account by a viscosity ependent pre-exponential factor. Consistent results are obtained when a polarity-depend nt activation energy is used.

Paper Details

Date Published: 27 April 1988
PDF: 7 pages
Proc. SPIE 0910, Fluorescence Detection II, (27 April 1988); doi: 10.1117/12.945453
Show Author Affiliations
Kelly G Casey, Texas Tech University (United States)
Edward L Quitevis, Texas Tech University (United States)


Published in SPIE Proceedings Vol. 0910:
Fluorescence Detection II
E. Roland Menzel, Editor(s)

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