Electrooxidation and Electroreduction of Anthraquinone Chromophores at the Platinum Electrode

摘要

This study investigates the electrochemical behavior of anthraquinone dyes in non-aqueous solution.Cyclic voltammetry and differential pulse voltammetry were used to estimate the electrochemicalparameters of electrooxidation and electroreduction at the platinum electrode. The effects of differentsubstituents on the electrochemical properties of solvent dyes were determined based on physico-chemical parameters such as the peak potential (E pa ), half-peak potential (E pa/2 ) or half-wave potential(E 1/2 ). Theoretical methods were used to estimate the diffusion coefficients, solubility parameters andHOMO–LUMO gaps of the anthraquinone dyes. The structures and morphologies of the studiedpowders were also examined using scanning electron microscopy (SEM). Cyclic voltammogramsshowed multiple redox processes and revealed quasi-reversible behavior in all the studied dyes.