Radical anions from one-electron-reduced adrenochrome. Detection and identification by electron spin resonance spectroscopy.
Free radicals from the one-electron reduction of adrenochrome have been studied in aqueous solutions. These radicals have been detected and identified by electron spin resonance spectroscopy, using spin stabilization methods (complexation with diamagnetic metal ions) to enhance radical concentrations. It is shown that the radicals have a characteristic ESR spectrum enabling their identification in complex systems. The spin density distribution in the radicals has been studied as a function of complexing metal ions and solvent composition. In the presence of oxidants (e.g., oxygen) the spectrum of the radical is replaced by that derived from the one-electron exidation of adrenochrome.
Prabhananda
B S
BS
Kalyanaraman
B
B
Sealy
R C
RC
D000323:Adrenochrome; D004578:Electron Spin Resonance Spectroscopy / Q000379:methods; D005609:Free Radicals; D007700:Kinetics; D008670:Metals; D010084:Oxidation-Reduction
D005609:Free Radicals; D008670:Metals; D000323:Adrenochrome