Polyoxometalate-based eight-connected self-catenated network and fivefold interpenetrating framework

Two entangled compounds [(bpy)6CuI6Cl3(MoVW5O19)] (1) and [(bpy)7CuI7Cl2(BW12O40)]·H2O (2) (bpy=4,4′-bipyridine), have been successfully synthesized under hydrothermal conditions and characterized by element analysis, IR spectroscopy, thermal gravimetric analysis, X-ray photoelectron spectroscopy, and single crystal X-ray diffraction analyses. Compound 1 represents the first eight-connected self-penetrating network constructed from cuprous chloride clusters [Cu6Cl3] and Lindquist-type polyoxoanions. Compound 2 exhibits an interesting fivefold interpenetrating network consisting of Keggin polyoxoanions and Cu+-metal–organic framework. Crystal data of the two compounds are following: 1, triclinic, P1¯, a=11.502(2) Å, b=13.069(3) Å, c=13.296(3) Å, α=90.55(3)°, β=113.74(3)°, γ=110.48(3)°, Z=1; 2, triclinic, P1¯, a=12.341(3) Å, b=13.119(3) Å, c=15.367(3) Å, α=99.12(3)°, β=90.53(3)°, γ=104.49(3)°, Z=1.

Graphical abstractCompound 1 is the POM-based unprecedented eight-connected self-penetrating organic–inorganic hybrid network constructed from the cuprous chloride clusters [Cu6Cl3], Lindquist-type polyoxoanions [MoVW5O19], and the 4,4′-bipyridine ligands.Figure optionsDownload full-size imageDownload as PowerPoint slide