1977 Volume 25 Issue 1 Pages 75-78
A detection method of radicals during photolysis of catecholamines and 3, 4-dihydroxyphenyl-L-alanine was established. Electron spin resonance spectra of the radicals derived from catecholamines under the photolytic condition showed hyperfine structures which were assigned to o-semiquinone anion radicals.