X-ray Powder Diffraction Study of Organometallic Polymers: [Ru(L)(CO)2]n (L = 2,2\u2019-Bipyridine or 1,10 Phenanthroline)

A combination of rather unconventional XRPD methods has been used to assess the polymeric nature of the [Ru(L)(CO)(2)](n) (L = 2,2'-bipyridine, 4,4'-dimethyl-2,2'-bipyridine, and 1,10-phenanthroline) derivatives. The polymeric chains pack pseudohexagonally in the ab plane and grow along c with Ru-Ru distances close to 3.0 Angstrom. The very poor diffraction patterns of these electrogenerated polymers suggest that the flat Ru(L)(CO)(2) monomers are staggered by 45degrees or 135degrees rotations (as in [Ru(CO)(4)](n)) but stack in random sequence along the chains

Novel Complexes trans(Cl)-[Os(bpy)(CO)(CH3CN)Cl2]n (n = 0, +1; bpy = 2,2′-Bipyridine): Photo- and Electrochemical Syntheses and Comparative Study of Their Bonding and Redox Properties

International audienc

Electrosynthesis, physico-chemical and electrocatalytic properties of a novel electroactive Ru(0) material based on the (Ru(terpy)(CO)) frame (terpy=2,2′:6′,2′′-terpyridine)

International audienceThe preparation of an electroactive material based on a (Ru(terpy)(CO)) frame (terpy/2,2?:6?,2??-terpyridine) has been achievedby the two electron reduction of trans- or cis-[Ru(terpy)(CO)Cl2] complexes. During this electrochemical process, two chlorideligands are released and metal/metal bonds are formed. The highly coloured resulting compound containing Ru/Ru bonds caneither be coated as a film on an electrode surface in acetonitrile electrolyte or generated as a soluble product in DMSO electrolyte.The nature of this material does not depend on the stereochemistry of the starting complex and its characterization, either as a solidand in solution, has been investigated by an interplay between electroanalytical and spectroscopic techniques including 1H-NMR,UV/vis, MS and IR. It appears from the data that one of the possible structure of the material is an oligomeric [Ru(terpy)(CO)]nwith n/3. The trans- and cis-[Ru(terpy)(CO)Cl2] complexes and the related organometallic metal/metal based material displaycatalytic activity in the electroreduction of carbon dioxide in hydro-organic media. Interestingly, [Ru(terpy)(CO)]n modifiedelectrodes also display electrocatalytic activity in purely aqueous solutions

Heterogenization of molecular catalysts in layered hydroxide host materials towards CO2 electrochemical reduction application

International audienc