Issue 9, 2001

Investigation of the kinetics of electron transfer processes involving fullerenes at liquid–liquid interfaces using scanning electrochemical microscopy: evidence for Marcus inverted region behaviour

Abstract

Electron transfer (ET) reactions between the anions of fullerenes (C60 and C70) in chlorobenzene (PhCl) and Fe(CN)63− in an aqueous phase have been investigated using scanning electrochemical microscopy (SECM). Salts of the anion ClO4 were added to each phase to control the interfacial potential drop and maintain charge neutrality during the ET process. The rate constants of ET between C60 and Fe(CN)63− were similar to those between C70 and Fe(CN)63−. Although the measured ET kinetics were found to depend on the interfacial potential drop, the rate constant for the oxidation of the fulleride anion (reduction of aqueous Fe(CN)63−) decreased when the ClO4 concentration in the aqueous phase increased, even though this corresponds to an increase in driving force. It is suggested that this could be due to inverted region behaviour predicted by Marcus theory.

Graphical abstract: Investigation of the kinetics of electron transfer processes involving fullerenes at liquid–liquid interfaces using scanning electrochemical microscopy: evidence for Marcus inverted region behaviour

Article information

Article type
Paper
Submitted
26 Mar 2001
Accepted
18 Jun 2001
First published
18 Jul 2001

J. Chem. Soc., Perkin Trans. 2, 2001, 1608-1612

Investigation of the kinetics of electron transfer processes involving fullerenes at liquid–liquid interfaces using scanning electrochemical microscopy: evidence for Marcus inverted region behaviour

J. Zhang and P. R. Unwin, J. Chem. Soc., Perkin Trans. 2, 2001, 1608 DOI: 10.1039/B102734B

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