Liquid–liquid ion transport junctions based on paired gold electrodes in generator–collector mode

Electrophoresis - Tập 30 Số 19 - Trang 3361-3365 - 2009
Robert W. French1, Yohan Chan2, Philip C. Bulman Page2, Frank Marken1
1Department of Chemistry, University of Bath, Claverton Down, Bath, UK
2School of Chemical Sciences and Pharmacy, University of East Anglia, Norwich, Norfolk, UK

Tóm tắt

Abstract

Simultaneous electrochemically driven double anion transfer across liquid–liquid interfaces is demonstrated at a gold–gold junction electrode. In the presence of two closely spaced electrodes (generator and collector), anion uptake into the organic phase (oxidation) and anion expulsion into the aqueous phase (reduction) can be combined to result in a generator–collector anion transport system across the liquid–liquid interface. In this report we are employing a paired gold junction grown by electro‐deposition to ca. 5 μm gap size with the N,N‐diethyl‐N′,N′‐didodecyl‐phenylene‐diamine water immiscible redox liquid immobilized into the gap to demonstrate simultaneous perchlorate anion uptake and expulsion. The effects of redox liquid volume and scan rate on the magnitude of currents and two mechanistic pathways for ion transport are discussed in the context of micro‐electrophoretic processes.

Từ khóa


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Thông tin xuất bản

Electrophoresis

Tập 30 Số 19

3361-3365

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