Differences of behaviour in electrooxidation of 3,3′-dimethoxybenzidine and its N,N,N′,N′-tetraalkylated derivatives: a further example of potential inversion |
| |
Authors: | Tahar Douadi Michel Cariou |
| |
Affiliation: | a Laboratoire d'Electrochimie des Matériaux Moléculaires et Complexes, Département de Génie des Procédés, Université F. Abbas, Sétif, Algeria b Laboratoire d'Ingénierie Moléculaire et Matériaux Organiques, UMR CNRS 6501, 2 Boulevard Lavoisier, 49045 Angers Cedex 01, France |
| |
Abstract: | The anodic oxidation of 3,3′-dimethoxybenzidine and its derivatives were studied by cyclic voltammetry, voltammetry at a rotating platinum electrode, chronopotentiometry and constant potential coulometry. The exhaustive oxidation of 3,3′-dimethoxybenzidine led at the potential of the first oxidation peak and second oxidation peak, respectively, to a stable cation radical salt (characterized by ESR spectroscopy) and to a quinone-diimine. Whereas, 3,3′-dimethoxy-N,N,N′,N′-tetramethylbenzidine afforded directly a dication salt owing to potential inversion 3,3′-dimethoxy-N,N,N′,N′-tetraethylbenzidine gave the corresponding soluble cation radical salt. |
| |
Keywords: | Dimethoxybenzidine Electrooxidation Cation radical Dication Potential inversion |
本文献已被 ScienceDirect 等数据库收录! |
|