Hydrothermal Synthesis, Crystal Structure and Catalytic Properties of a Novel Polyoxometalate:

(C5H7N2)3(AsMo12O40)·2C5H6N2·1.5H2O was hydrothermally synthesized and structurally characterized by single-crystal X-ray diffraction. Crystal data: monoclinic, P21/n, a = 13.310(3), b = 22.399(5), c = 19.820(4) Å, β = 99.99(3) ◦, V = 5819(2) Å3, Z = 1, wR(F2) = 0.1345. The structure consists of Keggin-type [AsMo12O40]3− polyoxoanions. The title compound has a high catalytic activity for the oxidation of acetone tested in a continuous-flow fixed-bed micro-reactor. When the initial concentration is 5.3 g m−3 in air and the flow rate is 2.5 mL min−1, the acetone is completely eliminated at 150 ◦C.