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Measurement of rapid electron transfer across a liquid/liquid interface from 7,7,8,8-tetracyanoquinodimethane radical anion in 1,2-dichloroethane to aqueous tris(2,2-bipyridyl)-ruthenium (III)
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Li, Fei, Whitworth, Anna L. and Unwin, Patrick R. (2007) Measurement of rapid electron transfer across a liquid/liquid interface from 7,7,8,8-tetracyanoquinodimethane radical anion in 1,2-dichloroethane to aqueous tris(2,2-bipyridyl)-ruthenium (III). Journal of Electroanalytical Chemistry, Vol.602 (No.1). pp. 70-76. doi:10.1016/j.jelechem.2006.12.002 ISSN 0022-0728.
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Official URL: http://dx.doi.org/10.1016/j.jelechem.2006.12.002
Abstract
Rate constants for the reduction of tris(2,2-bipyridyl)-dichlororuthenium (III) (Ru(bipy)(3)(3+)) in water by 7,7,8,8-tetracyanoquinodimethane radical anion (TCNQ(.-)) in 1,2-dichloroethane (DCE) have been measured as a function of the Galvani potential across an ideally non-polarizable interface using scanning electrochemical microscopy (SECM). The Galvani potential was varied by changing the concentration of tetrabutylammonium chloride in the aqueous phase, with a fixed concentration of the organic electrolyte, tetrabutylammonium tetrakis(penta-fluoro)phenylborate, employed in the DCE phase. By selecting appropriate concentration ratios of the reactants in the two phases, fast electron transfer (ET) rate constants were measured which were found to increase with increasing driving force. The experimentally obtained ET rate constants have been compared to the corresponding theoretical values calculated from the sharp boundary and thick layer models of Marcus. The results are consistent with the sharp boundary model, providing further evidence for the applicability of this model for the description of simple ET processes across liquid/liquid interfaces. (c) 2007 Elsevier B.V. All rights reserved.
Item Type: | Journal Article | ||||
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Subjects: | Q Science > QD Chemistry | ||||
Divisions: | Faculty of Science, Engineering and Medicine > Science > Chemistry | ||||
Journal or Publication Title: | Journal of Electroanalytical Chemistry | ||||
Publisher: | Elsevier SA | ||||
ISSN: | 0022-0728 | ||||
Official Date: | 1 April 2007 | ||||
Dates: |
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Volume: | Vol.602 | ||||
Number: | No.1 | ||||
Number of Pages: | 7 | ||||
Page Range: | pp. 70-76 | ||||
DOI: | 10.1016/j.jelechem.2006.12.002 | ||||
Status: | Peer Reviewed | ||||
Publication Status: | Published | ||||
Access rights to Published version: | Restricted or Subscription Access |
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