This paper reports the synthesis and characterization of a novel series of chain-like compounds where oxo-centered triruthenium cluster moieties are bridged by 4,4′-bipyridine (4,4′-bpy) spacers. A reaction of solvent-coordinated triruthenium "monomer" precursor [Ru 3O(CH3CO2)6(CO)(CH 3OH)2] with a 0.1 equimolar amount of 4,4′-bpy in CH3OH gave mixture of chain-like compounds containing "dimers" to "tetramers" which were cleanly separated by column chromatography and characterized by spectroscopic and electrochemical methods. Cyclic voltammetry revealed that all chain-like compounds exhibit reversible and stepwise redox processes in solution with very weak intramolecular coupling between the triruthenium components across the 4,4′-bpy bridge. Photo-induced dissociation of CO from the compounds and electrode surface binding were also investigated.
All Science Journal Classification (ASJC) codes
- Inorganic Chemistry