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Issue 12, 2010
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Reduction of oxygen catalyzed by nickel diphosphine complexes with positioned pendant amines

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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

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Publication details

The article was received on 12 Oct 2009, accepted on 30 Nov 2009 and first published on 19 Jan 2010


Article type: Paper
DOI: 10.1039/B921245K
Citation: Dalton Trans., 2010,39, 3001-3010
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    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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