Cyclic voltammetry of nitronyl- and iminonitroxyls detected by electron spin resonance

The combined cyclic voltammetry method (cyclic voltammetry detected by electron spin resonance, CVA-DESR CVA) was applied to study the electrochemical reactions of nitronyl- and iminonitroxyls (NN and IN) and to estimate the diffusion and absorption characteristics of their products. The ESR method yielded the hyperfine structure constants, including 13C. Even if exposed to lower temperature, all the studied NN were shown to spontaneously lose oxygen and to convert gradually into the relevant IN. For each specific NN, the combined CVA-DESR CVA experiments found the reduction potential value at which it can be virtually completely converted into the relevant IN.