Abstract

Electron scavenging reactions in aqueous glasses are analyzed in a stochastic model and then compared with transient charge transport in thin film amorphous xerographic photo-conductors. In both systems time dependent rate constants need to be introduced which are related to the waiting time distribution governing single transitions. Evidence is presented suggesting that these transitions in at least some aqueous glasses are due to random walk hoppinh as opposed to tunnelling or trapping. A fractional power of an exponential decay law is derived which is consistent with the straight line experimental plots of log [ N(0)/ N( t)] versus log t, where N( t) is the number of reactants remaining at time t. Algebraic decay laws can also be derived which are related to the kinetics of xerographic photo-currents and to long lifetime phosphorescence.

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