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Electron‐Transfer Kinetics in Polymetallic Carbon‐Rich Ruthenium(II) Bis(σ‐arylacetylides) Wires Connected to Gold
Author(s) -
Mulas Andrea,
Hervault YvesMarie,
Norel Lucie,
Rigaut Stéphane,
Lagrost Corinne
Publication year - 2015
Publication title -
chemelectrochem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.182
H-Index - 59
ISSN - 2196-0216
DOI - 10.1002/celc.201500206
Subject(s) - electron transfer , kinetics , ruthenium , cyclic voltammetry , electrochemistry , isocyanide , chemistry , monolayer , glassy carbon , self assembled monolayer , electrode , materials science , photochemistry , nanotechnology , catalysis , stereochemistry , organic chemistry , physics , quantum mechanics
Molecular wires consisting of Ru II bis(σ‐arylacetylide) organometallics functionalized with different anchoring groups (thiol, isocyanide) connected with different bridges [Ø, −CH 2 −, −O−(CH 2 ) 6 −] were self‐assembled onto gold surfaces. The materials were characterized through wettability, ellipsometric, infrared absorption reflection, and electrochemical measurements. The dynamics of the electron transfers within the monolayers were examined with high‐speed voltammetry. Similar fast electron‐transfer dynamics (10 4 s −1 ) associated with discrete oxidation events (up to four distinct oxidation states) at remarkably low potentials (≤0.7 V vs. SCE) were observed for all complexes. Neither the extension of the molecular wires, nor the variation in the anchoring/bridging units, led to the decrease in electron‐transfer kinetics. These results highlight the potential of Ru II bis(σ‐arylacetylide) complexes as a charge‐storage medium for processing information in multibit devices with low power consumption.