Logo image
Back
Electrochemical characteristics of the copper(II)-copper(I) redox couple in dimethyl sulfoxide solutions
Journal article   Peer reviewed

Electrochemical characteristics of the copper(II)-copper(I) redox couple in dimethyl sulfoxide solutions

M.D. Benari and G.T. Hefter
Australian Journal of Chemistry, Vol.43(11), pp.1791-1801
1990
DOI: https://doi.org/10.1071/CH9901791
url
Link to Published Version *Subscription may be requiredView

Abstract

A study of the electrochemical characteristics of the copper(II)/copper(I) redox couple has been made in chloride and bromide media in dimethyl sulfoxide (Me2SO) and their aqueous analogues. The formal potentials of the CuII/CuI couple in the Me2SO media are approximately 0.15 V less positive than in their aqueous counterparts probably due to a combination of solvation and complexation effects. Diffusion coefficients for both CuI and CuII are 5-10 times lower in Me2SO than in H2O as a result of the higher viscosity of Me2SO solutions. Heterogeneous electron-transfer rate constants for the CuII/CuI system on platinum are also an order of magnitude smaller than in aqueous solution. In general the electrochemical characteristics of the CuII/CuI system parallel those reported elsewhere for the FeIII/FeII couple. However, a detailed investigation of the CuII/CuI system by cyclic voltammetry indicates that the overall electrode process is complex, probably involving a quasi-reversible electron-transfer step coupled to a rate-determining loss of Cl - from CuII.

Details

Metrics

39 Record Views
11 Times Cited - Web of Science

InCites Highlights

These are selected metrics from InCites Benchmarking & Analytics tool, related to this output

Citation topics
2 Chemistry
2.89 Ionic, Molecular & Complex Liquids
2.89.462 Excess Molar Volumes
Web Of Science research areas
Chemistry, Multidisciplinary
ESI research areas
Chemistry
Logo image