DUAL SITES OF SOLVATION FOR ELECTRONS IN AQUEOUS NONIONIC MICELLAR SOLUTIONS - A TIME-DEPENDENT KINETIC-ANALYSIS

Electrons are produced by photoionization of a probe molecule phenothi azine (PTH) in aqueous micellar solutions of Triton X-100 by excitatio n with 355 nm, 35 ps laser pulses. Transient absorption signals follow ing the laser pulses show the presence of singlet, triplet and cation radical of PTH and solvated electrons in both aqueous phase and micell ar palisade layer. Computer simulations are carried out to separate th e overlapping spectra, estimate the solvation time of the electrons in both the phases, and the time required for the electron solvated in t he palisade layer to diffuse out to the bulk aqueous phase. Copyright (C) 1997 Elsevier Science Ltd.