Micromechanical Redox Actuation by Self-Assembled Monolayers of Ferrocenylalkanethiolates: Evens Push More Than Odds

Micromechanical Redox Actuation by Self-Assembled Monolayers of Ferrocenylalkanethiolates: Evens Push More Than Odds

Microcantilever transducers can be valuable tools for the investigation of physico­chemical processes in organized molecular films. Gold-coated cantilevers are used here to investigate the electro­chemo­mechanics of redox-active self-assembled monolayers (SAMs) of ferrocenyl­alkane­thiolates (Fc­(CH...

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Veröffentlicht in:Journal of the American Chemical Society 2018-08, Vol.140 (32), p.10063-10066
Hauptverfasser: Dionne, Eric R, Dip, Christopher, Toader, Violeta, Badia, Antonella
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container_end_page 10066
container_issue 32
container_start_page 10063
container_title Journal of the American Chemical Society
container_volume 140
creator Dionne, Eric R
Dip, Christopher
Toader, Violeta
Badia, Antonella
description Microcantilever transducers can be valuable tools for the investigation of physico­chemical processes in organized molecular films. Gold-coated cantilevers are used here to investigate the electro­chemo­mechanics of redox-active self-assembled monolayers (SAMs) of ferrocenyl­alkane­thiolates (Fc­(CH2) n S) of different alkyl chain lengths. A significant odd–even effect is observed in the surface stress and cantilever movement generated by the oxidation of the SAM-confined ferrocenes as the number of methylene units n in the SAM backbone is varied. We demonstrate that stronger alkyl chain–chain interactions are at the origin of the larger surface stresses generated by SAMs with an even versus odd n. The findings highlight the impact of subtle structural effects and weak van der Waals interactions on the mechanical actuation produced by redox reactions in self-assembled systems.
doi_str_mv 10.1021/jacs.8b04054
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