Issue 12, 2010

Reduction of oxygen catalyzed by nickel diphosphine complexes with positioned pendant amines

Abstract

Nickel(II) bis(diphosphine) complexes that contain positioned bases in the second coordination sphere have been found to catalyze the reduction of O2 with H2 to selectively form water. The complexes also serve as electrocatalysts for the reduction of O2 with the addition of a weak acid. In contrast, a closely related nickel diphosphine complex without the positioned bases is catalytically inactive for O2 reduction. These results indicate that pendant bases in synthetic catalysts for O2 reduction can play a similar role to proton relays in enzymes, and that such relays should be considered in the design of catalysts for multi-electron and multi-proton reactions.

Graphical abstract: Reduction of oxygen catalyzed by nickel diphosphine complexes with positioned pendant amines

Supplementary files

Article information

Article type
Paper
Submitted
12 Oct 2009
Accepted
30 Nov 2009
First published
19 Jan 2010

Dalton Trans., 2010,39, 3001-3010

Reduction of oxygen catalyzed by nickel diphosphine complexes with positioned pendant amines

J. Y. Yang, R. M. Bullock, W. G. Dougherty, W. S. Kassel, B. Twamley, D. L. DuBois and M. Rakowski DuBois, Dalton Trans., 2010, 39, 3001 DOI: 10.1039/B921245K

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