A new redox site as an alternative to ferrocene to study electron transfer in self-assembled monolayers

Cédric Hortholary (1) , Freddy Minc (1) , Christophe Coudret (1) , Jacques Bonvoisin (1) , Jean-Pierre Launay (1)

1 CEMES - Centre d'élaboration de matériaux et d'études structurales

The cyclometallated ruthenium complex [Ru(bpy)2(pp)]+ (bpy: 2,2A-bipyridine; pp: 2-(2A-ylphenyl)pyridine) was easily grafted to a w-alkanethiol and the resulting compound was coadsorbed with 11-hydroxyundecanethiol on gold yielding a Self-Assembled Monolayer (SAM) in an analogous manner as for a ferrocene derivative, as shown by impedance spectroscopy; the kinetics of the heterogeneous electron transfer were shown to be very fast, compared to ferrocene, which makes this new redox site a promising candidate for further studies about molecular wires.

Mots clés: SAM; Electron transfer; Ruthenium; AC voltammetry

Domaines: Chimie de coordination

Cédric Hortholary, Freddy Minc, Christophe Coudret, Jacques Bonvoisin, Jean-Pierre Launay. A new redox site as an alternative to ferrocene to study electron transfer in self-assembled monolayers. Chemical Communications, 2002, 17, pp.1932 - 1933. ⟨10.1039/b205073k⟩. ⟨hal-01740655⟩