EPR OF GAMMA-IRRADIATED (CH3)(3)NHCLO4, (CH3)(3)NHBF4 AND [(CH3)(4)N](2)ZNCL4 SINGLE-CRYSTALS

Gamma irradiation damage centres in (CH3)(3)NHClO4, (CH3)(3)NHBF4 and [(CH3)(4)N](2)ZnCl4 were investigated by electron paramagnetic resonan ce spectroscopy at room temperature. The centres were found to be (CH3 )(3)N+. and the hyperfine structure parameters for methyl protons and the nitrogen nucleus were determined aerermlned. The results indicated that the (CH3)(3)N+. radical wholly performs reorientational motions around its C-3v axis in addition to the reorientatonal motions of the methyl groups around their C-3v axes. These results were compared with the earlier studies on (CH3)(3)N+. radical and discussed. Low tempera ture measurements on the first two of the title compounds were assesse d. (C) 1998 Elsevier Science Ltd. All rights reserved.