A Novel Ruthenium-Decorating Polyoxomolybdate Cs₃Na₆H[MoRu₂O(OH)₂]·24H₂O: An Active Heterogeneous Oxidation Catalyst for Alcohols.

The first example of wholly inorganic ruthenium-containing polyoxomolybdate Cs₃Na₆H[MoRu₂O(OH)₂]·24H₂O () was isolated and systematically characterized by element analysis, infrared spectroscopy (IR), thermogravimetric analyses (TGA), X-ray photoelectron spectroscopy (XPS), energy dispersive X-ray spectroscopy (EDX) and single-crystal X-ray diffraction. Compound is composed of an unprecedented {Mo}-type isopolymolybdate with a di-ruthenium core precisely encapsulated in its center, exhibiting a three-tiered ladder-like structure. The title compound can act as an efficient heterogeneous catalyst in the transformation of 1-phenylethanol to acetophenone. This catalyst is also capable of being recycled and reused for at least ten cycles with its activity being retained under the optimal conditions.