DOI: 10.1063/1.452656. Torsional dynamics of molecules on barrierless potentials in liquids. I. Temperature and wavelength dependent picosecond studies of triphenyl-methane dyes

Torsional dynamics of molecules on barrierless potentials in liquids. I. Temperature and wavelength dependent picosecond studies of triphenyl-methane dyes

10.1063/1.452656

Crossref journal-article

AIP Publishing

The Journal of Chemical Physics (317)

Abstract

The nonradiative decay dynamics of crystal violet, and other triphenyl-methane dyes, dissolved in a variety of solvents, are studied as a function of temperature. A linear viscosity dependence of the excited state absorption decay time in n-alcohol solvents is found at several constant temperatures. The temperature dependence at constant viscosity is anomalously negative over the entire viscosity range (0.6 to 8.0 cP) of these experiments. Various possible mechanisms for the observed behavior are critically discussed. Two color excite-and-probe studies reveal ground state bleach recovery times which are independent of excitation wavelength but strongly dependent on probe wavelength. The faster decay on the red side of the ground state absorption is shown to be the result of stimulated emission rather than the influence of a second state.

Bibliography

Ben-Amotz, D., & Harris, C. B. (1987). Torsional dynamics of molecules on barrierless potentials in liquids. I. Temperature and wavelength dependent picosecond studies of triphenyl-methane dyes. The Journal of Chemical Physics, 86(9), 4856â4870.

Authors 2

Dor Ben-Amotz (first)
C. B. Harris (additional)

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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, 1:05 a.m.)
Indexed	1 month, 4 weeks ago (July 1, 2025, 6:29 a.m.)
Issued	38 years, 3 months ago (May 1, 1987)
Published	38 years, 3 months ago (May 1, 1987)
Published Print	38 years, 3 months ago (May 1, 1987)

Funders 0

None

BibTeX

@article{Ben_Amotz_1987, title={Torsional dynamics of molecules on barrierless potentials in liquids. I. Temperature and wavelength dependent picosecond studies of triphenyl-methane dyes}, volume={86}, ISSN={1089-7690}, url={http://dx.doi.org/10.1063/1.452656}, DOI={10.1063/1.452656}, number={9}, journal={The Journal of Chemical Physics}, publisher={AIP Publishing}, author={Ben-Amotz, Dor and Harris, C. B.}, year={1987}, month=may, pages={4856–4870} }

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