Spectroelectrochemistry at the liquid|liquid interface: Parallel beam UV-vis absorption

Research output: Contribution to journalArticle

Abstract

We present two novel UV-vis absorption spectroelectrochemical cells for the study of electrochemical processes at polarized liquid|liquid interfaces based on the parallel incidence of the light beam with respect to the interface. The first one is a crude design (Cell 1) based on an existing cylindrical cell for liquid|liquid electrochemistry. The second design (Cell 2) is superior and based on the assembly of the four-electrode set-up inside a rectangular quartz spectrophotometric cuvette. In both cases it is demonstrated that absorption spectroelectrochemistry in parallel beam configuration can be a sensitive probe of processes such as ion transfer at the polarized liquid|liquid interface, if the contribution from the bulk of the sampled phase is removed. In particular, the electrochemical and spectroscopic performance of both cell designs was evaluated using the well-known transfer of Ru(bpy)32+ across the water|1,2-DCE interface as a model reaction. © 2008 Elsevier Ltd. All rights reserved.

Bibliographical metadata

Original languageEnglish
Pages (from-to)5071-5076
Number of pages5
JournalElectrochimica Acta
Volume54
Issue number22
DOIs
Publication statusPublished - 1 Sep 2009