A new bitrack sinusoid-like chain templated by Wells–Dawson type polyoxometalate

A new Wells–Dawson type polyoxometalate (POM)-templated compound, [Cu4(μ2-O)2(4,4′-bpo)4(INA)2(H2O)4][(P2W18O62)]·H2O (1) (4,4′-bpo = 2,5-bis(4-pyridyl)-1,3,4-oxadiazole; INA = pyridine-4-carboxylic acid), has been hydrothermally synthesized. Compound 1 contains a novel bitrack sinusoid-like chain constructed from alternating dicopper units and non-linear rigid 4,4′-bpo linkers. Induced by POM templates, the adjacent chains formed elliptical spaces to accommodate the Wells–Dawson type anions.