Role of torsional dynamics in the photophysics of xanthene dyes

Kelly G. Casey; Edward L. Quitevis

doi:10.1117/12.945453

Role of torsional dynamics in the photophysics of xanthene dyes

Kelly G. Casey, Edward L. Quitevis

Chemistry and Biochemistry

Research output: Contribution to journal › Article › peer-review

5 Scopus citations

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.

Original language	English
Pages (from-to)	144-150
Number of pages	7
Journal	Proceedings of SPIE - The International Society for Optical Engineering
Volume	910
DOIs	https://doi.org/10.1117/12.945453
State	Published - Apr 27 1988

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title = "Role of torsional dynamics in the photophysics of xanthene dyes",

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.",

author = "Casey, {Kelly G.} and Quitevis, {Edward L.}",

note = "Funding Information: We are pleased to acknowledge support by the donors of the Petroleum Research Fund, administered by the American Chemical Society, the Robert A. Welch Foundation, and the Research Corporation. In addition, we would like to thank Professor G. W. Robinson for allowing us to use the equipment and facilities at the Picosecond and Quantum Radiation Laboratory at Texas Tech University.",

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doi = "10.1117/12.945453",

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T1 - Role of torsional dynamics in the photophysics of xanthene dyes

AU - Casey, Kelly G.

AU - Quitevis, Edward L.

N1 - Funding Information: We are pleased to acknowledge support by the donors of the Petroleum Research Fund, administered by the American Chemical Society, the Robert A. Welch Foundation, and the Research Corporation. In addition, we would like to thank Professor G. W. Robinson for allowing us to use the equipment and facilities at the Picosecond and Quantum Radiation Laboratory at Texas Tech University.

PY - 1988/4/27

Y1 - 1988/4/27

N2 - 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.

AB - 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.

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Role of torsional dynamics in the photophysics of xanthene dyes

Abstract

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