Electrochemical behavior of anthraquinone in aqueous solution in presence of a non-ionic surfactant

Abstract EN

Cyclic voltammetric behavior of anthraquinone in aqueous medium has been studied in presence of a non-ionic surfactant, Triton X-100 (TX-100) using sodium salt of anthraquinone-2- sulphonic acid (AQS) as the electro-active species.

When cathodic potential is applied, the anthraquinone (AQ) group of AQS is reduced to its dianion.

In the reverse scan, the oxidation of AQ2 gives AQ.

The electrochemical behavior shows a profound influence from the dissolved state of TX-100 in aqueous media.

Spectrophotometric results indicate interaction between AQ and TX-100.

A CEC (chemical–electrochemical–chemical) mechanism with the electrochemical reaction coupled with preceding interaction of AQS with TX-100 and following protonation reaction of reduced AQ has been proposed.