The paper of Prof. Seiji Ogo(Principal Investigator, Catalytic Materials Transformations Research Division, I²CNER) and Prof. Takahiro Matsumoto(Catalytic Materials Transformations Research Division, I²CNER) was published in online Dalton Transactions on December 10, 2013, also will be published journal of “Dalton Transactions, Volume 43, Number 8” on February 28, 2014.

■Outline

We propose a model for the water-oxidation and recovery systems of the oxygen-evolving complex (OEC) of the photosystem II (PSII) enzyme. The whole system is constructed from two catalytic cycles, conducted as a tandem reaction: (i) a water-oxidation loop uses cerium(IV) ammonium nitrate as an oxidant to activate a dimanganese complex for water-oxidation and thereby liberate a molecule of O₂ and (ii) a recovery loop begins with photoinhibition of the dimanganese complex but then uses O₂ to reactivate the manganese centre. The net result is a catalytic water-oxidation catalyst that can use self-generated O₂ for recovery.

■Paper
Title: A model for the water-oxidation and recovery systems of the oxygen-evolving complex

Authors: Takeshi Yatabe, Mitsuhiro Kikkawa, Takahiro Matsumoto, Hidetaka Nakai, Kenji Kaneko and Seiji Ogo
DOI: 10.1039/C3DT52846D

Article first published online: 10 Dec 2013