G. Abou-Elenien, N. Ismail, Adel Said Elmaghraby
1991
Citations
0
Influential Citations
7
Citations
Journal
Electrochimica Acta
Abstract
Abstract Substituted 2-arylazo-anthraquinones are electrochemically studied in benzonitrile at an rde . These compounds are oxidized in a single quasi-reversible two electron wave or in a two quasi-reversible one-electron processes depending on the nature of substituent, leading to the formation of the dication followed by proton removal to form the monocation which can be stabilized through its combination with the perchlorate anion from the supporting electrolyte. The reduction process occurs in three successive electron transfer processes. The coloumetric measurements indicated two-electrons for the first step and one-electron for each of the second and third steps. The azo moiety is reduced in the first step to the dianion which accepts two protons from the solvent to give the corresponding hydrazo. The second and third electron transfers were assigned to the reduction of the quinone moiety to form the corresponding radical-anion and dianion.