Hydrogen-Bonded Assemblies of Two-Electron Reduced Mixed-Valence [XMo12O40] (X = P and Si) with p-Phenylenediamines

A "directed precursor self-assembly" strategy for the facile synthesis of heteropoly blues: crystal structures, formation mechanism and electron distribution

Recent research studies demonstrated that heteropoly blues (reduced polyoxometalates) could act as a special kind of solid material with potential functions in antiviral activity, and photocatalytic, photothermal and semiconducting properties. In this work, we develop a "directed precursor self-assembly" strategy for the facile synthesis of heteropoly blues (HPBs), so four representative HPBs [GeW₁₀MoO₄₀], [GeMoMoO₄₀], [P₂W₁₆MoO₆₂] and [P₂W₁₂MoMoO₆₂] have been synthesized and structurally characterized. These four heteropoly blue compounds were synthesized by the solution self-assembly reaction of a precursor [MoO₄(H₂O)₂(ox)₂]^2- with vacant polyoxometalates. Electrospray ionization mass spectrometry (ESI-MS) was used to analyze the assembly mechanism of these HPBs. A detailed study on the magnetic properties was also carried out, which shows that the number of Mo^V and their locations are capable of adjusting the electron distribution in HPBs.

Supramolecular self-assembly for designing non-centrosymmetric crystals based on Keggin polyoxometallates and crown ether

POM based non-centrosymmetric inorganic–organic hybrids are designed by gradually introducing asymmetry into the building units.