S. Adhikari et al., REACTION-KINETICS OF HYDRATED ELECTRONS IN A QUATERNARY MICRO EMULSION SYSTEM - A PULSE-RADIOLYSIS STUDY, International journal of chemical kinetics, 30(10), 1998, pp. 699-705
The pulse-radiolysis technique has been employed to produce and study
the kinetics of hydrated electrons (e(aq)(-)) in a quaternary micro em
ulsion (Sodium Lauryl Sulfate (NaLS)/water/cyclohexane/1-pentanol) sys
tem. Two orders of magnitude higher life time (20 mu s) of the e(aq)(-
) has been obtained as compared to that in reverse micelles reported e
arlier. Several probes including a biomolecule have been used to deter
mine the water pool concentrations and quenching constants (k(q)). The
observed yield and half life (t(1/2)) of the hydrated electrons vary
smoothly as the water droplet sizes are changed. The bimolecular rate
constants for the reaction of e(aq)(-) with different solutes have bee
n determined. It has been observed that the measured bimolecular rate
constants for the reaction of hydrated electrons with different solute
s are indicative of the solubilization sites, the water core sizes, an
d the surrounding environment. (C) 1998 John Wiley C Sons, Inc.