MIGRATION OF EXCESS ELECTRONS IN POLAR LIQUIDS - DEPENDENCE ON SOLVENT VISCOSITY

The existence of a correlation between the mobility (mu-e) of solvated electrons and the viscosity (eta) of the host liquids is examined for 34 different pure polar solvents for which data have been reported in the literature. It is shown that the variation of mu-e with eta can be represented as mu-e = C-eta(-n), with n almost-equal-to 0.83 and C almost-equal-to 2.07 x 10(-3), where mu-e is in cm2/V s and eta is in centipoises. This mu-e-vs-eta relationship seems to be consistent with the results of recent quantum simulation calculations which favour a diffusive mechanism for the migration of excess electrons in polar liquids.