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The reactions were analyzed by visible spectrophotometry, mass spectrometry, and measurement of evolved dioxygen using Ce<jats:sup>4+<\/jats:sup> as sacrificial oxidant. A mechanism proposed on the basis of DFT calculations involves the reversible oxidation to the mononuclear V<jats:sup>V<\/jats:sup>\u2010{ON\u02d9&lt;} center, where the redox active oxyimino group plays a key role and metal oxidation state variation is only one unit. The more similar model of the metallobiomolecule, [V(HIDPA)<jats:sub>2<\/jats:sub>]<jats:sup>2\u2212<\/jats:sup>, displays a lower oxidation rate than [V(HIDA)<jats:sub>2<\/jats:sub>]<jats:sup>2\u2212<\/jats:sup> but does not undergo appreciable degradation, in contrast to the latter.<\/jats:p>","DOI":"10.1002\/anie.201509604","type":"journal-article","created":{"date-parts":[[2015,12,10]],"date-time":"2015-12-10T07:08:23Z","timestamp":1449731303000},"page":"1489-1492","source":"Crossref","is-referenced-by-count":24,"title":["Amavadin and Homologues as Mediators of Water Oxidation"],"prefix":"10.1002","volume":"55","author":[{"given":"Magdalena","family":"Domarus","sequence":"first","affiliation":[{"name":"Centro de Qu\u00edmica Estrutural Instituto Superior T\u00e9cnico Universidade de Lisboa  Av. 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