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Transient spectroscopy of triphenylmethane derivatives following subpicosecond irradiation

Authors
Journal
Chemical Physics
0301-0104
Publisher
Elsevier
Publication Date
Volume
153
Identifiers
DOI: 10.1016/0301-0104(91)90025-o

Abstract

Abstract Time-resolved absorption spectra of triphenylmethane dye solutions are measured in the 320–750 nm wavelength range in pump-probe experiments with subpicosecoud resolution. The observed spectral evolution occurs at a rate which depends on solvent viscosity. The transient spectra are described by the superposition of the absorption and/or gain spectra of the states S 0 and S 1, and of an intermediate state S x involved in the relaxation process. The results indicate that the S x absorption spectrum is similar to that of S 1 but blue-shifted.

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