EPR studies of NH2+radicals created in the TGS: Fe3+crystal after UV irradiation

Abstract Analysis of the radicals created in the TGS: Fe3+ crystal after UV-irradiation in the temperature 4.2 K using EPR technique are presented. Before UV-irradiation the low temperature (4.2 K) EPR spectra of TGS: Fe3+ due to Fe3+ ion is observed. After irradiation Fe3+ spectrum vanishes and new spectrum due to NH2 + radicals is observed. A model, based on the charge transfer from the ligands (NH2CH2COO)2 onto the central ion Fe3+, is presented.