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. 2013 Sep 9;110(39):15579–15584. doi: 10.1073/pnas.1315383110

Scheme 2.

Scheme 2.

Proposed mechanism for water oxidation catalyzed by Co-porphyrins involving two one-electron oxidations of CoIII to +P-CoIII–OH and +P-CoIV–O. Roles for the buffer anion (B) include serving as a base to assist proton transfer and inhibition of the catalyst through coordination.