Electron paramagnetic resonance study of irradiated tetramethyl-4-piperidion

Abstract

Abstract The electron paramagnetic resonance of single crystals of tetramethyl-4-piperidion (TMP; C9H19NO) has been observed and analysed for different orientations of the crystal in the magnetic field, after being damaged at 300 K by γ-irradiation. The crystals have been investigated between 100 and 450 K. The spectra were found to be temperature dependent. The irradiation of TMP by γ-rays produces radicals at the nitrogen atoms in the molecule. The principal values of the hyperfine coupling tensor of the unpaired electron and the principal values of the g-tensor were determined. The results were found to be in good agreement with the existing literature data and theoretical predictions. Keywords: EPRTetramethyl-4-piperidionC9H19NORadicalsSpin density