Bound-free transition of trapped electrons in polar matrices

The photon energy dependence of the bound-free transition probability for trapped electrons in polar matrices is calculated for ice, ethylene glycol-water (50/50), 2-propanol, 2-methyltetrahydrofuran, diisopropylamine, and triethylamine. A hydrogenic model is used for the transition probability, and the necessary parameters are calculated from a semicontinuum potential model. Both distorted wave and plane wave approximations are made. The calculated results are in reasonable agreement with the available experimental data on the photon energy dependence of photobleaching and photoconductivity efficiencies for trapped electrons in several matrices and support the assignment of bound-free transitions to these processes. Distinct trends with matrix polarity are reproduced by the calculations.