An EPR Study on Radiation-Induced 2-(piperidin-1-ylmethyl)phenol Single Crystal

Abstract

For the assessment of irradiation influence on 2-(piperidin-1-ylmethyl)phenol single crystals (C12H17NO), electron paramagnetic resonance measurements were carried out on the samples exposed to 60 Co radiation at dose values of 22.8, 45.6 and 68.4 kGy at room temperature. Electron paramagnetic resonance signals were not observed in non-irradiated sample and in samples irradiated at dose values of 22.8 and 45.6 kGy. The electron paramagnetic resonance measurements were performed on the single crystals. This irradiated single crystal was rotated in steps of 10• . One type of radical center was found. The average values of g and hyperfine constant of the detected radiation damage center were calculated from experimental spectra as follows: g = 2.0052, AH = 0.74 mT.

Comparative Study of Influences of Gamma Rays on Calix[4]Arene and 25,27-di(4-Nitrobenzyl)-26,28-Dihydroxycalix[4]Arene: EPR Study

“…Therefore, it is important to identify radical structures produced by irradiation. EPR is a powerful spectroscopic method for detecting radicals in the materials [7][8][9][10][11][12][13][14][15][16][17][18]. In this study, Calix [4]arene, labeled calix [4]arene (1), and 25,27-di(4-nitrobenzyl)-26,28-dihydroxycalix [4]arene, labeled calix [4]arene(2), were exposed to gamma rays and then radical structures of these calix [4]arenes were evaluated by EPR method.…”