Molecule-based metal oxides are promising materials for a wide range of semiconductor technologies as they allow access to atomically precise, modular materials. Polyoxometalates (POMs) are excellent candidates as building blocks owing to their wide structural diversity, ease of functionalization and facile, reversible redox activity. This talk will present the synthesis of tunable tungsten oxide materials via coordination assemblies of the Preyssler anion, [NaP5W30O110]14−, or its derivatives. Remarkably, X-ray diffraction shows that the frameworks adopt the same structure with bridging units based on Mn2+, Fe2+, Co2+, Ni2+, Cu2+, Zn2+ or mixtures thereof, and similar structures can be obtained when doping the cluster with Mo or exchanging the center cation prior to framework assembly. Furthermore, the assembly architecture of these frameworks can be directed via inclusion of non-bridging metal cations, enabling further tunability of the metal oxide extended structures. These materials demonstrate the promise of molecular building block approaches to developing new solid-state metal oxides with tunable or emergent properties.

Coordination assembly of Preyssler-type polyoxoanions

ACS Spring Meeting 2021

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