Influence of another, ruthenium containing, electroactive component on the apparent heterogeneous electron transfer rate constant of a ferrocene containing molecular wire in a Self-Assembled Monolayer of 11-hydroxyundecanethiol on gold |
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Authors: | Cdric Hortholary Christophe Coudret |
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Institution: | aCEMES CNRS, UPR8011, 29, rue Jeanne-Marvig, 31055 Toulouse cedex 4, France |
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Abstract: | The co-adsorption of three thiol compounds on gold, two of them being electroactive, yields a Self-Assembled Monolayer (SAM) the behaviour of which was studied by impedance spectroscopy. The two redox active thiols have been chosen to have a good miscibility in a supporting inert component, non-degenerate first-oxidation redox couples, and distinct heterogeneous electron transfer rate constant. However, in the ternary monolayer, the slowest process was found to be concentration dependent on the other redox site. This unexpected behaviour should thus be taken into account when using multi-component SAM as a support for integrated devices. |
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Keywords: | Ternary Self-Assembled Monolayers Ferrocene Cyclometallated ruthenium complexes Heterogeneous electron transfer Impedance spectroscopyMots-clé s: Couches auto-assemblé es ternaires Complexes cyclomé tallé s de ruthé nium Transfert d'é lectron hé té rogè ne Spectroscopie d'impé dance |
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