Manifestation of ion-molecular charge transfer in the kinetics of microwave field effect on recombination fluorescence

The calculation of the electron spin evolution operator was performed in the presence of frequency migration over the arbitrary hyperfine structure. The results obtained were used to analyze the transformation of OD μWFE (optically detected microwave field effect) kinetics with concentration on the system hexafluorobenzene/p-terphenyl−d14 (C6F6/PTP−d14) in n-dodecane. It was shown that only the account for the additional electron transfer reaction PTP−d14−+C6F6→PTP−d14+C6F6− allows one to achieve a good agreement between the theoretical and experimental data. The rate constant of this process was estimated to be 1010 M−1s−1. The theoretical approach developed can be also used to analyze magnetic and spin effects in photochemically induced reactions of radical ions.