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Bizjak, T.; Bisht, P. B.; Lochbrunner, Stefan; Riedle, Eberhard ORCID: 0000-0002-2672-5718 (2004): Femtosecond transient spectroscopy of the photoionization of indole in water. Ultrafast Events in Molecular Science VIth International Conference on Femtochemistry, July 6–10, 2003, Maison de la Chimie, Paris, France.
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The photodynamics of electronically excited indole in water is investigated by UV-visible pump-probe spectroscopy with 80 fs time resolution and compared to the behavior in other solvents. In cyclohexane population transfer from the optically excited L-a to the L-b state happens within 7 ps. In ethanol ultrafast state reversal is observed, followed by population transfer from the L-b to the L-a state within 6 ps. In water ultrafast branching occurs between the fluorescing state and the charge-transfer-to-solvent state. Presolvated electrons, formed together with indole radicals within our time resolution, solvate on a timescale of 350 fs.