FeCl3 oxidation coupling of terthiophene

and ITíS bisylilated derivative-

Spectroscopic study by UV-Visible


A. Tounsi1*, M. Hamidi1, T. Lakhlifi2, M. Bouachrine3

1 Departement of chemistry, Faculty of Sciences and Technics, Errachidia, BP 509 Boutalamine Errachidia, Morocco

2 Departement of chemistry, Faculty of Sciences Meknes, BP 11201 Zitoune Meknes, Morocco

3 Departement of chemistry, Faculty of Taza, B.P.1223/Taza Gare, Morrocco

* Corresponding author. E-mail: samtounsi@yahoo.fr

Received:24 October 2007; revised version accepted: 14 March 2008



     Trimethylsilyl groups facilitate the a-a' oxidative coupling of thiophene and lead to polythiophene with improved structural and electronic properties. We were interested in defining the role of trimethylsilyl during the polymerization mechanism. In the present paper, we intend to discuss the mechanism of coupling radical cations of terthiophene on the basis of the UV-Visible spectroscopy. The role of silicon is equally considered.


Keywords: Oligothiophene; Polymerization mechanism; Trimethylsilyl; UV-Visible spectroscopy. Radical cation.

© 2015