EXCESS ELECTRONS IN HOMOGENEOUS AND HETER OGENEOUS POROUS-MEDIA

A review of our present knowledge concerning the solvation of excess e lectrons (e(exc)(-) --> e(solv)(-)) produced by photoionization or rad iolysis in polar media has been attempted. Various properties of the s olvated electron (proposed solvation mechanisms, structure, physicoche mical characteristics) are considered. In spite of some similarities, e(solv)(-) does not seem to be a good prototype for solvated halide an ions. The behavior of e(exc)(-) in heterogeneous model systems, such a s micellar solutions and molecular clusters, is described and correlat ed with that observed in homogeneous media.