Oxygen Reduction with a Bifunctional Iridium Dihydride Complex
2015 | journal article. A publication with affiliation to the University of Göttingen.
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Oxygen Reduction with a Bifunctional Iridium Dihydride Complex
Schiwek, C.; Meiners, J.; Foerster, M.; Wuertele, C.; Diefenbach, M.; Holthausen, M. C. & Schneider, S. (2015)
Angewandte Chemie International Edition, 54(50) pp. 15271-15275. DOI: https://doi.org/10.1002/anie.201504369
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Details
- Authors
- Schiwek, Christoph; Meiners, Jenni; Foerster, Moritz; Wuertele, Christian; Diefenbach, Martin; Holthausen, Max C.; Schneider, Sven
- Abstract
- The iridium dihydride [Ir(H)(2)(HPNP)](+) (PNP=N(CH2CH2PtBu2)(2)) reacts with O-2 to give the unusual, square-planar iridium(III) hydroxide [Ir(OH)(PNP)](+) and water. Regeneration of the dihydride with H-2 closes a quasi-catalytic synthetic oxygen-reduction reaction (ORR) cycle that can be run several times. Experimental and computational examinations are in agreement with an oxygenation mechanism via rate-limiting O-2 coordination followed by H-transfer at a single metal site, facilitated by the cooperating pincer ligand. Hence, the four electrons required for the ORR are stored within the two covalent M-H bonds of a mononuclear metal complex.
- Issue Date
- 2015
- Status
- published
- Publisher
- Wiley-v C H Verlag Gmbh
- Journal
- Angewandte Chemie International Edition
- ISSN
- 1521-3773; 1433-7851
- Sponsor
- Deutsche Forschungsgemeinschaft [SCHN950/2]; COST action [CM1205]
