Free Access
Issue
J. Chim. Phys.
Volume 95, Number 6, June 1998
Page(s) 1339 - 1342
DOI https://doi.org/10.1051/jcp:1998278
DOI: 10.1051/jcp:1998278


J. Chim. Phys. Vol. 95, N°6  p. 1339-1342

Electrochemical behavior of self-assembled monolayers based on functionalized oligothiophenes

R. Michalitsch, A. El Kassmi, P. Lang, A. Yassar and F. Garnier

CNRS, Laboratoire des Matériaux Moléculaires, 2 rue Henri Dunant, 94320 Thiais, France

Abstract
Self-assembled monolayers (SAMs) of 6-(2,2':5',2"-terthien-5yl)- hexanethiol ( $\alpha$-3T-hex-SH) have been prepared onto platinum substrates. The anodic oxidation of the monolayer effects a polymerisation of the monolayer. The conjugation length of the polymer is significantly higher than that of the terthiophene-derivative, although a major part of the terminal CH- $\alpha$ bonds of the terthiophenes are still available for reactions with other monomers. This suggests a contribution of the aromatic CH- $\beta$ positions at the formation of the conjugated polymer.

Résumé
Des monocouches auto-assemblées, (SAM), de 6-(2,2':5',2"-terthien-5yl)- hexanethiol ( $\alpha$-3T-hex-SH) ont été préparées sur le platine. L'oxydation anodique effectue une polymérisation de la monocouche. La longueur de conjugaison du polymère est significativement plus élevée qu'au dérivée du terthiophène, bien que la plupart des liaisons CH- $\alpha$ terminal des terthiophènes restent disponibles pour des réaction avec des autres monomères. Ce qui propose la participation des C-H en position $\beta$ des terthiophène à la formation d'une couche d'un polymère conjugué.


Key words: oligothiophenes -- thiol -- self-assembled monolayers
Contents

© EDP Sciences 1998

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