title: Solvation dynamics of the electron produced by two-photon ionization of liquid polyols. 1. Ethylene glycol.
abstract: Solvated electrons have been produced in ethylene glycol by two-photon ionization of the solvent with 263 nm femtosecond laser pulses. The two-photon absorption coefficient of ethylene glycol at 263 nm is determined to be beta = (2.1 +/- 0.2) x 10(-11) m W(-1). The dynamics of electron solvation in ethylene glycol has been studied by pump-probe transient absorption spectroscopy. So, time-resolved absorption spectra ranging from 430 to 710 nm have been measured. A blue shift of the spectra is observed for the first tens of picoseconds. Using the Bayesian data analysis method, the observed solvation dynamics are reconstructed with different models: stepwise mechanisms, continuous relaxation models, or combinations of stepwise and continuous relaxation. Comparison between models is in favor of continuous relaxation, which is mainly governed by solvent molecular motions.
authors.affiliation: Laboratoire de Chimie Physique/ELYSE, UMR 8000 CNRS/Université Paris-Sud, Centre d'Orsay, Bât. 349, 91405 Orsay Cedex, France.
authors.forename: B
authors.initials: B
authors.lastname: Soroushian
authors.forename: I
authors.initials: I
authors.lastname: Lampre
authors.forename: J
authors.initials: J
authors.lastname: Bonin
authors.forename: P
authors.initials: P
authors.lastname: Pernot
authors.forename: S
authors.initials: S
authors.lastname: Pommeret
authors.forename: M
authors.initials: M
authors.lastname: Mostafavi