[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) (BTDCZ3,30,4,40-benzophenone tetracarboxylate, bpyZ4,40-bipyridine), has been prepared with the contemporary use of two different kinds of ligands, the rigid 4,40-bipyridyl (bpy) and the V-shaped flexible multi-carboxylic ligands H4BTDC, and characterized by single-crystal X-ray diffraction analysis. The threedimensional framework is assembled from bpy-pillared two-dimensional sheets and contains one-dimensional rhombus channels with the dimensions of 4.06!12.07 A ° . Furthermore, compound 1 shows blue photoluminescent property at room temperature. q 2005 Elsevier B.V. All rights reserved.