Study of the structure of free radicals in gamma irradiated amino acid derivatives
Description
Electron paramagnetic resonance spectroscopy has been used for the study of the free radicals produced in the powders of L-arginine monohydrochloride, ala-ala and DL-β-leucine gamma-irradiated at room temperature. The structures of the radicals formed in compounds were determined as NH2(NH)NHCHCH2CH2CH(NH2)CO OH, CH3CHCOOH and (CH3)2 CCH(NH2)CH2COOH respectively. The paramagnetic species were found to be stable at room temperature more than three months. It was determined that unpaired electron interacted with nearby protons and 14N nucleus in these radicals. The g values of the radicals and the hyperfine structure constants of the free electron were also measured. These results were compared with the earlier studies in amino acid and derivatives radicals and discussed. (author)
Additional details
Identifiers
Publishing Information
- Journal Title
- Brazilian Journal of Physics
- Journal Volume
- 40
- Journal Issue
- 4
- Journal Page Range
- p. 429-431
- ISSN
- 0103-9733
- CODEN
- BJPHE6
INIS
- Country of Publication
- Brazil
- Country of Input or Organization
- Brazil
- INIS RN
- 42006544
- Subject category
- S38: RADIATION CHEMISTRY, RADIOCHEMISTRY AND NUCLEAR CHEMISTRY; S74: ATOMIC AND MOLECULAR PHYSICS;
- Descriptors DEI
- ARGININE; DOUBLE RESONANCE METHODS; ELECTRON SPIN RESONANCE; GAMMA RADIATION; GAMMA SOURCES; HYPERFINE STRUCTURE; SPECTRA; SPECTROSCOPY; STRUCTURAL CHEMICAL ANALYSIS
- Descriptors DEC
- AMINO ACIDS; CARBOXYLIC ACIDS; ELECTROMAGNETIC RADIATION; IONIZING RADIATIONS; MAGNETIC RESONANCE; ORGANIC ACIDS; ORGANIC COMPOUNDS; RADIATION SOURCES; RADIATIONS; RESONANCE