Abstract

Fourier transforms of the electron spin echo envelope modulation (FTESEEM) patterns of deuterated TANOLD spin probes (4-hydroxy-2,2,6,6-pipexidinyl-1-oxy-d 17 ) in the amine-cured DGEBA at room temperature show two pairs of deuterium lines displaced about the free deuterium frequency (2.2 MHz) which are assigned to the electron-nuclear hyperfine couplings of inequivalent -CD 3 groups of the nitroxide. Conformational asymmetry of the -CD 3 groups accounts for the experimentally observed tiro pairs of spectral lines at room temperature and the diasppearance of one pair of lines at 100 K

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