title: Mono- and bimetallic Ir(III) based catalysts for the homogeneous photocatalytic reduction of CO₂ under visible light irradiation. New insights into catalyst deactivation.
abstract: Mononuclear iridium(III) complexes [Ir(mppy)(tpy)X] (mppy = 4-methyl-2-phenylpyridine, X = Cl, I) and binuclear analogues with various bis(2-phenylpyridin-4-yl) bridging ligands were synthesized and characterized by their spectroscopic and electrochemical properties. Kinetic measurements concerning the photocatalytic two electron reduction of CO2 to CO were investigated in order to determine the influence of intermolecular interactions between two active centers. A detailed comparison between the monometallic and the bimetallic complexes indicates an enhanced lifetime (TON) of the covalently linked complexes, causing an increased overall conversion of CO2. Additionally the deactivation pathways of the catalysts are examined.
authors: WACKER-Chair of Macromolecular Chemistry, Technische Universität München, Lichtenbergstr. 4, 85748 Garching, Germany. rieger@tum.de.
authors: Richard O
authors: RO
authors: Reithmeier
authors: Simon
authors: S
authors: Meister
authors: Bernhard
authors: B
authors: Rieger
authors: Armin
authors: A
authors: Siebel
authors: Martin
authors: M
authors: Tschurl
authors: Ulrich
authors: U
authors: Heiz
authors: Eberhardt
authors: E
authors: Herdtweck