Sodium periodate was characterized as a chemical oxidant for driving water-oxidation catalysts at neutral pH. The oxygen-evolution reaction between Cp*Ir(bpy)SO4 (bpy = 2,2'-bipyridine) and sodium periodate was monitored by using a Clark-type oxygen electrode and visible spectroscopy. NMR spectroscopy and dynamic light scattering suggest that the Cp*Ir(bpy)SO4 remains homogeneous during turnover. Other water-oxidation catalysts from the literature were tested for activity with sodium periodate, and only those catalysts having low overpotentials were found to evolve oxygen. Sodium periodate may thus be used to characterize water-oxidation catalysts at neutral pH, and may serve as a preliminary screen for catalysts with low overpotentials.

Sodium periodate as a primary oxidant for water-oxidation catalysis

244th National Meeting (2012)

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