Nanocomposite Gels between [V10O28]6- and [AlO4Al12(OH)24(H2O)12]7+ Polyoxometalate Clusters

Combination of anionic [V10O28]6- and cationic [AlO4Al12(OH)24(H2O)12]7+ polyoxometalate clusters in an aqueous solution resulted in immediate hydrogel precipitation formation. This gel has the clusters in a 1:1 ratio arranged alternatively to form a short-range ordering. The precipitate, upon drying at room temperature, converts into a monolithic gel probably through the condensation of the [AlO4Al12(OH)24(H2O)12]7+ clusters as evidenced by the change of 27Al solid-state MAS NMR data.