Reductive dimerization mechanisms of some streptocyanine dyes

Christiane André-Barrès (1) , Fadia Najjar (1, 2) , Marie-Pierre Maether (1) , Corinne Payrastre (1) , Peter Winterton (3) , Théodore Tzedakis (4)

1 SPCMIB - Synthèse et Physico-Chimie de Molécules d'Intérêt Biologique
2 LU / ULB - الجامعة اللبنانية [بيروت] = Lebanese University [Beirut] = Université libanaise [Beyrouth]
3 UT3 - Université Toulouse III - Paul Sabatier
4 LGC - Laboratoire de Génie Chimique

Cyclic voltammetric studies of streptocyanine dyes were carried out on a glassy carbon electrode. For dye electroreduction, logarithmic analysis of the convoluted current indicates an EC2 mechanism with dimerization following electron transfer. Relevant kinetic and thermodynamic values are reported.

Mots clés: Streptocyanine; Dye; Dimerization; Electron transfer; Convoluted current; Cyclic voltammetry

Domaines: Génie chimique; Génie des procédés

Christiane André-Barrès, Fadia Najjar, Marie-Pierre Maether, Corinne Payrastre, Peter Winterton, et al.. Reductive dimerization mechanisms of some streptocyanine dyes. Electrochimica Acta, 2014, 132, pp.423-433. ⟨10.1016/j.electacta.2014.04.023⟩. ⟨hal-01917795⟩