title: Donor-Flexible Nitrogen Ligands for Efficient Iridium-Catalyzed Water Oxidation Catalysis.
abstract: A pyridylideneamide ligand with variable donor properties owing to a pronounced zwitterionic and a neutral diene-type resonance structure was used as a dynamic ligand at a Cp* iridium center to facilitate water oxidation catalysis, a reaction that requires the stabilization of a variety of different iridium oxidation states and that is key for developing an efficient solar fuel device. The ligand imparts high activity (nearly three-fold increase of turnover frequency compared to benchmark systems), and exceptionally high turnover numbers, which indicate a robust catalytic cycle and little catalyst degradation.
authors.affiliation: Department of Chemistry & Biochemistry, University of Bern, Freiestrasse 3, 3012, Bern, Switzerland.|School of Chemistry and Chemical Biology, University College Dublin, Belfield, Dublin, 4, Ireland.
authors.forename: Miquel
authors.initials: M
authors.lastname: Navarro
authors.affiliation: Department of Chemistry, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, PA 15213, USA.
authors.forename: Mo
authors.initials: M
authors.lastname: Li
authors.affiliation: School of Chemistry and Chemical Biology, University College Dublin, Belfield, Dublin, 4, Ireland.
authors.forename: Helge
authors.initials: H
authors.lastname: Müller-Bunz
authors.affiliation: Department of Chemistry, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, PA 15213, USA. bern@cmu.edu.
authors.forename: Stefan
authors.initials: S
authors.lastname: Bernhard
authors.affiliation: Department of Chemistry & Biochemistry, University of Bern, Freiestrasse 3, 3012, Bern, Switzerland. martin.albrecht@dcb.unibe.ch.|School of Chemistry and Chemical Biology, University College Dublin, Belfield, Dublin, 4, Ireland. martin.albrecht@dcb.unibe.ch.
authors.forename: Martin
authors.identifier: 0000-0001-7403-2329
authors.initials: M
authors.lastname: Albrecht
keywords: N-donor ligands; donor flexibility; iridium; water oxidation; zwitterion