Abstract
Electron transfer has been observed by ESR spectroscopy in x-irradiated single crystals of partially deuterated glycine hydrochloride. The crystals were irradiated at 4.2°K and the transfer occurs on warming to 77°K. It consists of the movement of electrons between carboxyl groups with the electrons exhibiting greater affinity for protonated carboxyl groups than for deuterated carboxyl groups. A slight perturbation of β-proton hyperfine couplings in carboxyl anion radicals due to substitution of a deuteron for a proton on the carboxyl group was also observed. The shift in coupling, which amounts to a fraction of a megahertz, was measured by ENDOR spectroscopy.
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