Electron spin resonance analysis of the redox indicator variamine blue II.
The oxidation of the redox indicator Variamine Blue in an aqueous medium has been studied by the ESR method. The optimum conditions for the formation of the radical have been determined. The spectra have in some cases shown hyperfine splitting, from which conclusions could be drawn for the nature of the oxidation reaction and structure of the oxidized product. The coupling constants have also been determined for the radicals. The correctness of the assumptions for the structure of the radicals has been supported by the simulation of spectra and the investigation of deuterated derivatives.
Erdey
L
L
Institute for General and Analytical Chemistry of the Technical University, Budapest, Hungary.
Meisel
T
T
Mohos
B
B
Tüdös
F
F