Ion transfer voltammetry at the interface of water and low dielectric constant organic solutions

Ion transfer reaction at the water (W)vertical bar low dielectric constant organic solution (O) interface was investigated using cyclic voltammetry with a micro-interface electrolytic cell. Organic solvents used in this work were benzene, anisole and chloroform, in addition to the previously reported toluene. The transfer reactions of quaternary ammonium ions and anions across the Wilow dielectric constant O interface were found to be reversible. Formal potentials for ion transfer from W to benzene, anisole, chloroform and toluene, Delta(W)(benzene)phi(0'), Delta(W)(anisole)phi(0'), Delta(W)(chloroform)phi(0') and Delta(W)(toluee)phi(0') were evaluated, and linear correlations were observed between these formal potentials and the standard potential reported at the and W vertical bar 1,2- dichloroethane interface, Delta(W)(DCE)phi(0). While plots for cations and anions fall on different straight lines between Delta(W)(benzene)phi(0') and Delta(W)(DCE)phi(0), Delta(anisole)phi(0' )and Delta(W)(DCE)phi(0), or Delta(W)(toluene)phi(0') and Delta(W)(DCE)phi(0), Delta(W)(chloroform)phi(0') for cations and anions and Delta(W)(DCE)phi(0) appeared on the same straight line. (C) 2020 Elsevier Ltd. All rights reserved.