International Conference on METALS IN SOLUTION
J. Phys. IV France 01 (1991) C5-161-C5-166
FEMTOSECOND INFRARED AND VISIBLE SPECTROSCOPY OF EXCESS ELECTRON IN NEAT DIMETHYLSULFIDEY. GAUDUEL1, S. POMMERET1, A. ANTONETTI1, J. BELLONI2 and J.L. MARIGNIER2
1 Laboratoire d'Optique Appliquée, Ecole Polytechnique - ENS Techniques Avancées, CNRS URA 1406 - INSERM U275, F-91120 Palaiseau, France
2 Laboratoire de Physico-Chimie des Rayonnements associé au CNRS (URA 75), Université Orsay Paris-Sud, Bâtiment 350, F-91405 Orsay cedex, France
Preliminary femtosecond spectroscopic studies of primary events occurring in the neat dimethylsulfide at 294 K following initial energy deposition are presented. A transient induced absorbance in the infrared (1330 nm) appears in 120 fs after the ultraviolet photoionization of dimethylsulfide. Considering scavenging experiments, we assign this signal to the solvated electron [MATH]. In the visible spectral region ([MATH] = 420 nm), a short lived species, formed in less than 300 fs has been observed. A tentative assignment of this transient component is directed toward the existence of a solvated or complexed form of the primary anion resulting from the direct electron attachment to solvent molecule.
© EDP Sciences 1991