Jump to main content
Jump to site search
Access to RSC content Close the message box

Continue to access RSC content when you are not at your institution. Follow our step-by-step guide.


Issue 20, 2013
Previous Article Next Article

Significant changes in pKa between bulk aqueous solution and surface immobilized species: ortho-hydroquinones

Author affiliations

Abstract

The pKa values of two ortho-hydroquinone H2Q, systems immobilized at a carbon electrode are investigated using voltammetric methods and compared with those of the corresponding molecules in bulk aqueous solution. A large and significant increase of both pKa values for the successive equilibria H2Q ⇆ HQ + H+ ⇆ Q2− + 2H+ are observed, which highlight the fact that very significant differences of thermodynamic and chemical behaviour exist between molecules in bulk solution and immobilized at interfaces, both in general and in the case of quinones which are regularly used as electron transfer mediators in electroanalysis and electrocatalysis.

Graphical abstract: Significant changes in pKa between bulk aqueous solution and surface immobilized species: ortho-hydroquinones

Back to tab navigation

Article information


Submitted
11 Jan 2013
Accepted
22 Feb 2013
First published
26 Feb 2013

RSC Adv., 2013,3, 7347-7354
Article type
Paper

Significant changes in pKa between bulk aqueous solution and surface immobilized species: ortho-hydroquinones

P. T. Lee, J. C. Harfield, A. Crossley, B. S. Pilgrim and R. G. Compton, RSC Adv., 2013, 3, 7347
DOI: 10.1039/C3RA00164D

Social activity

Search articles by author

Spotlight

Advertisements