The study on the magnetic field effect and the microwave effect on the photoconductivity observed in the photolysis of N,N,N′,N′-tetramethyl-p-phenylenediamine: theoretical calculation trial by the stochastic Liouville equation Original Research Article

The magnetic field effect on the photoconductivity and photoconductivity detected magnetic resonance spectra observed in the photoionization system of N,N,N′,N′-tetramethyl-p-phenylenediamine (TMPD) in alcohol are analyzed by the numerical calculation. The stochastic Liouville equation is applied to the study of the dynamics of the transiently formed radical–ion pair (RIP). We succeeded in estimating the appropriate physical parameters according to the simulation of the line-width and the other observed phenomena. However, we realized that a new model, the formation of a cluster-like network structure between the RIP and the solvent molecules, should be introduced, because the calculation of the RIP dynamics in homogeneous solutions cannot reproduce the experimental results of the viscosity dependence.