A new supramolecular assembly composed of decatungstate polyanion and Cu/O/W heterometallic cluster

A new supramolecular assembly of [(CuL)2(WO4)2{CuL(H2O)}2][W10O32] · 8H2O (1) (L = 4′-(2-pyridyl)-2,2′:6′,2′-terpyridine) containing a decatungstate polyanion and a novel cationic Cu/O/W heterometallic cluster was successfully synthesized and characterized by single crystal X-ray diffraction and IR. The tungsten atoms adopt different coordination geometry in anion and cation, octahedral geometry (WO6) in decatungstate cluster and rare tetrahedral geometry (WO4) in cation cluster. During the hydrothermal process, the decomposition and reassembly based on [W6O19]2 − lead to the formation of [W10O32]4 − and Cu/O/W heterometallic cluster.

A new supramolecular assembly of [(CuL)2(WO4)2{CuL(H2O)}2] [W10O32] · 8H2O (1) (L = 4′-(2-pyridyl)-2,2′:6′,2′-terpyridine) was successfully synthesized, which is composed of a decatungstate polyanion and a novel cationic Cu/O/W heterometallic cluster.Figure optionsDownload as PowerPoint slideHighlights
► A new compound 1 contains a [W10O32]4– and Cu/O/W heterometallic clusters.
► The W atoms adopt two coordination geometries in anion and cation clusters.
► The formation of 1 verifies the transformation from [W6O19]2– to [W10O32]4–.