A new {P₂W₁₈} polyoxometalate cluster modified with copper complex based on pz, 2,2–bipy, and in situ amino acid

A new organic–inorganic hybrid compound, [{Cu2(2,2′–bipy)2(pz)(gly)}2P2W18O62]·H2O (bipy = bipyridine, pz = pyrazine, gly = glycine) (1), has been hydrothermally synthesized and characterized by elemental analysis, IR, thermal gravimetric, and single- crystal X-ray diffraction. Compound 1 is an infinite one-dimensional (1-D) chain constructed from [P2W18O62]6− clusters and linker exhibiting an alternating-type structure via equatorial terminal oxygens of the polyanion. The 1-D chains are further extended into 2-D layers and 3-D supramolecular network via weak interactions. The copper complex of 1 consists of three ligands, in which an in situ glycine from pyrazine precursor was observed. Additionally, the electrochemical and electrocatalytic properties of 1 have been studied.