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Electron spin resonance of free radicals formed in irradiated fatty acid methyl esters
Author(s) -
Hayda M.,
Hadziyev D.
Publication year - 1973
Publication title -
journal of the american oil chemists' society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.512
H-Index - 117
eISSN - 1558-9331
pISSN - 0003-021X
DOI - 10.1007/bf02640473
Subject(s) - irradiation , electron paramagnetic resonance , radical , stearate , chemistry , resonance (particle physics) , quartz , hyperfine structure , unsaturated fatty acid , analytical chemistry (journal) , photochemistry , fatty acid , nuclear magnetic resonance , materials science , organic chemistry , atomic physics , physics , nuclear physics , composite material
A composite nonsymmetrical electron spin resonance signal was detected in unsaturated fatty acid methyl esters (FAME) irradiated in quartz by a γ‐ray dose of 500 Krad at liquid nitrogen temperature. The signal spread over a width of ca. 20 G with a spectroscopic splitting factor value of ca. 2.038, but contained an interference from the irradiated quartz. A narrower signal (≃6 G) with a spectroscopic splitting factor value of 2.0361 was detected in the unsaturated FAME irradiated by UV, and was devoid of the hyperfine structure. No signal could be detected in methyl stearate irradiated by UV under the same conditions.