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- Title
Visible-Light-Driven Water Oxidation by a Molecular Manganese Vanadium Oxide Cluster.
- Authors
Schwarz, Benjamin; Forster, Johannes; Goetz, McKenna K.; Yücel, Duygu; Berger, Claudia; Jacob, Timo; Streb, Carsten
- Abstract
Photosynthetic water oxidation in plants occurs at an inorganic calcium manganese oxo cluster, which is known as the oxygen evolving complex (OEC), in photosystem II. Herein, we report a synthetic OEC model based on a molecular manganese vanadium oxide cluster, [Mn4V4O17(OAc)3]3−. The compound is based on a [Mn4O4]6+ cubane core, which catalyzes the homogeneous, visible-light-driven oxidation of water to molecular oxygen and is stabilized by a tripodal [V4O13]6− polyoxovanadate and three acetate ligands. When combined with the photosensitizer [Ru(bpy)3]2+ and the oxidant persulfate, visible-light-driven water oxidation with turnover numbers of approximately 1150 and turnover frequencies of about 1.75 s−1 is observed. Electrochemical, mass-spectrometric, and spectroscopic studies provide insight into the cluster stability and reactivity. This compound could serve as a model for the molecular structure and reactivity of the OEC and for heterogeneous metal oxide water-oxidation catalysts.
- Subjects
OXIDATION of water; VANADIUM oxide; MANGANESE compounds; PHOTOSYSTEMS; MASS spectrometry
- Publication
Angewandte Chemie International Edition, 2016, Vol 55, Issue 21, p6329
- ISSN
1433-7851
- Publication type
Article
- DOI
10.1002/anie.201601799