Voltammetric study of styryl-2 and styryl-4 pyrylium salts. Part 1. The redox properties of diphenyl-2,6 styryl-4 and
diphenyl-4,6 stryl-2 pyrylium salts have been studied by means of cyclic voltammetry. These salts disclose irreversible reduction and oxidation steps that are characterised by one reduction peak and two oxidation peaks, respectively. The second oxidation peak vanishes when the switching potential is ÿ0.75 V. The influence of water on the electrochemical behaviour of these salts as well as their degradation over several months has been studied. To cite this article: B. Guel et al., C. R. Chimie 10 (2007). Ó 2007 Acade´mie des sciences. Published by Elsevier Masson SAS. All rights reserved.

Cyclic voltammetry; Diphenyl-2, 6 styryl-4 and diphenyl-4