ESR and ENDOR study of x-irradiated single crystals of. beta. -alanine at room temperature
Three radicals have been identified in the room temperature ESR spectra of x-irradiated single crystals of ..beta..-alanine (N/sup +/H/sub 3/CH/sub 2/CH/sub 2/CO/sup -//sub 2/). ENDOR spectra from one radical exhibit hyperfine coupling to 1 ..cap alpha..-proton (A/sub x/x=-33.12, A/sub y/y=: 20.68, A/sub z/z=-10.50 G) and 2 ..beta..-protons (A/sub iso/(H/sub beta1/) =13.24 G, A/sub iso/(H/sub beta2/) =4.89 G). From the anisotropic nature of the ..cap alpha..-proton coupling it has been determined that these splittings arise from a N/sup +/H/sub 3/CH/sub 2/CHCO/sup -//sub 2/ radical. It has been shown that this radical is the decay product of the unstable low temperature oxidation product. A second room temperature radical, N/sup +/H/sub 3/CH/sub 2/CH/sub 2/C=0, has been shown to be a decay product of the primary reduction product. A minor room temperature product has been tentatively identified as a CH/sub 2/--CH/sub 2/--R radical.
- Research Organization:
- Department of Radiation Biology and Biophysics, The University of Rochester, School of Medicine and Dentistry, Rochester, New York 14642
- OSTI ID:
- 6407565
- Journal Information:
- J. Chem. Phys.; (United States), Journal Name: J. Chem. Phys.; (United States) Vol. 70:5; ISSN JCPSA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
360603* -- Materials-- Properties
ALANINE-BETA
ALANINES
AMINO ACIDS
CARBOXYLIC ACIDS
CRYSTALS
DATA
DATA FORMS
ELECTROMAGNETIC RADIATION
ELECTRON SPIN RESONANCE
ENDOR
EXPERIMENTAL DATA
INFORMATION
IONIZING RADIATIONS
ISOLATED VALUES
MAGNETIC RESONANCE
MONOCRYSTALS
NUMERICAL DATA
ORGANIC ACIDS
ORGANIC COMPOUNDS
RADIATIONS
RADICALS
RESONANCE
X RADIATION