The mechanism for the cathodic reduction of sulphur in dimethylformamide: low temperature voltammetry
The mechanism for the cathodic reduction of sulphur in dimethylformamide: low temperature voltammetry
Using voltammetry at low temperatures, it is demonstrated that the reduction of sulphur (S-8) in dimethylformamide (DMF) occurs in a 2e(-) step and the form of the voltammogram observed depends on the stability of the S-8(2) formed. At 223 K, it is stable. In contrast, at ambient temperatures it cleaves rapidly to give two S-4 anions and at more negative potentials, S-4(-) is reduced further in a reversible 1e(-) process. The diffusion coefficient for S-8 is a function of temperature and this leads to a substantial change to the current densities for the responses with temperature.
sulphur reduction, chemistry of s-8(2-), voltammetry, temperature
effects, electrochemical reduction, sulfur, solvents
514-518
Evans, A.
1cfe5902-0508-4a86-bbe2-72aa3a927f1a
Montenegro, M.I.
41167892-1c43-43a1-b9f3-4b7467671c39
Pletcher, D.
f22ebe69-b859-4a89-80b0-9e190e6f8f30
2001
Evans, A.
1cfe5902-0508-4a86-bbe2-72aa3a927f1a
Montenegro, M.I.
41167892-1c43-43a1-b9f3-4b7467671c39
Pletcher, D.
f22ebe69-b859-4a89-80b0-9e190e6f8f30
Evans, A., Montenegro, M.I. and Pletcher, D.
(2001)
The mechanism for the cathodic reduction of sulphur in dimethylformamide: low temperature voltammetry.
Electrochemistry Communications, 3 (9), .
(doi:10.1016/S1388-2481(01)00203-X).
Abstract
Using voltammetry at low temperatures, it is demonstrated that the reduction of sulphur (S-8) in dimethylformamide (DMF) occurs in a 2e(-) step and the form of the voltammogram observed depends on the stability of the S-8(2) formed. At 223 K, it is stable. In contrast, at ambient temperatures it cleaves rapidly to give two S-4 anions and at more negative potentials, S-4(-) is reduced further in a reversible 1e(-) process. The diffusion coefficient for S-8 is a function of temperature and this leads to a substantial change to the current densities for the responses with temperature.
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Published date: 2001
Keywords:
sulphur reduction, chemistry of s-8(2-), voltammetry, temperature
effects, electrochemical reduction, sulfur, solvents
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Local EPrints ID: 19473
URI: http://eprints.soton.ac.uk/id/eprint/19473
ISSN: 1388-2481
PURE UUID: bfa9dece-68d8-4c7a-8c0a-426a9ffcacd2
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Date deposited: 15 Feb 2006
Last modified: 15 Mar 2024 06:16
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Author:
A. Evans
Author:
M.I. Montenegro
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