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Electron-Transfer Kinetics in Polymetallic Carbon-Rich Ruthenium(II) Bis(σ-arylacetylides) Wires Connected to Gold

Abstract : Mol. wires consisting of RuII bis(σ-arylacetylide) organometallics functionalized with different anchoring groups (thiol, isocyanide) connected with different bridges [O, [n.63743]CH2[n.63743], [n.63743]O[n.63743](CH2)6[n.63743]] were self-assembled onto gold surfaces. The materials were characterized through wettability, ellipsometric, IR absorption reflection, and electrochem. measurements. The dynamics of the electron transfers within the monolayers were examd. with high-speed voltammetry. Similar fast electron-transfer dynamics (104 s-1) assocd. with discrete oxidn. events (up to four distinct oxidn. states) at remarkably low potentials (≤0.7 V vs. SCE) were obsd. for all complexes. Neither the extension of the mol. wires, nor the variation in the anchoring/bridging units, led to the decrease in electron-transfer kinetics. These results highlight the potential of RuII bis(σ-arylacetylide) complexes as a charge-storage medium for processing information in multibit devices with low power consumption.
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https://hal-univ-rennes1.archives-ouvertes.fr/hal-01188235
Contributor : Laurent Jonchère <>
Submitted on : Friday, August 28, 2015 - 4:26:09 PM
Last modification on : Thursday, March 5, 2020 - 2:02:41 PM

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Andrea Mulas, Yves-Marie Hervault, Lucie Norel, Stéphane Rigaut, Corinne Lagrost. Electron-Transfer Kinetics in Polymetallic Carbon-Rich Ruthenium(II) Bis(σ-arylacetylides) Wires Connected to Gold. ChemElectroChem, Weinheim : Wiley-VCH, 2015, 2 (11), pp.1799-1805. ⟨10.1002/celc.201500206⟩. ⟨hal-01188235⟩

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