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United States Patent Application

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Solution-phase (e.g., homogeneous) or surface-immobilized (e.g., heterogeneous) electrode-driven oxidation catalysts based on iridium coordination compounds which self-assemble upon chemical or electrochemical oxidation of suitable precursors and methods of making and using thereof are. Iridium species such as {[Ir(LX).sub.x(H.sub.2O).sub.y(.mu.-O)].sub.z.sup.m+}.sub.n wherein x, y, m are integers from 0-4, z and n from 1-4 and LX is an oxidation-resistant chelate ligand or ligands, such as such as 2(2-pyridyl)-2-propanolate, form upon oxidation of various molecular iridium complexes, for instance [Cp*Ir(LX)OH] or [(cod)Ir(LX)] (Cp*=pentamethylcyclopentadienyl, cod=cis-cis,1,5-cyclooctadiene) when exposed to oxidative conditions, such as sodium periodate (NaIO.sub.4) in aqueous solution at ambient conditions.
Sheehan, Stafford Wheeler (Tiverton, RI), Hintermair, Ulrich (Rottendorf, DE), Thomsen, Julianne M. (Colton, CA), Brudvig, Gary W. (Orange, CT), Crabtree, Robert H. (Bethany, CT)
14/ 317,906
June 27, 2014
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT [0002] This invention was made with government support under 1119826 and 1122492 awarded by National Science Foundation and under DE-FG02-07ER15909 awarded by Department of Energy and under GM008283 awarded by National Institutes of Health. The government has certain rights in the invention.