[Zn2(BTDA)(bpy)(H2O)]·0.5bpy: a new three-dimensional metal-organic framework constructed from flexible and rigid mixed ligands

A new three-dimensional metal-organic framework, [Zn2(BTDA)(bpy)(H2O)]·0.5bpy (1) (BTDC=3,3′,4,4′-benzophenone tetracarboxylate, bpy=4,4′-bipyridine), has been prepared with the contemporary use of two different kinds of ligands, the rigid 4,4′-bipyridyl (bpy) and the V-shaped flexible multi-carboxylic ligands H4BTDC, and characterized by single-crystal X-ray diffraction analysis. The three-dimensional framework is assembled from bpy-pillared two-dimensional sheets and contains one-dimensional rhombus channels with the dimensions of 4.06×12.07 Å. Furthermore, compound 1 shows blue photoluminescent property at room temperature.