Enzymes such as laccase and galactose oxidase utilize multinuclear copper centers to perform the four-electron reduction of dioxygen to water. Targeting models for these active sites, a tetranucleating ligand consisting of an aminetrisphenol backbone bearing three dipicolylamine moieties was synthesized. This framework binds three copper centers in addition to an early transition metal.  Several titanium-tricopper complexes have been synthesized and found to react readily with dioxygen. The effect of the ligand framework on reactivity will be discussed.

Synthesis and dioxygen reactivity of tetranuclear tricopper complexes

241st National Meeting (2011)

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