Effects of low ligand concentration on forms and potentials of linear scan and cyclic voltammograms for the reduction of complexes

Abstract

The effects of low total ligand concentration on potential shifts and shapes of linear scan and cyclic voltammograms for reversibly reduced systems were investigated. For systems with one predominant complex at substoichiometric ligand concentration the curves depend strongly on the value of the formation constant, with distorted double peaks observed for β values higher than approximately 10 11 . The forms of experimental current-potential curves for the Cu(II)-ethylenediamine system (β 2 ≈10 20 ) are shown to conform to curves calculated by digital simulation.