A Novel 3D Cu(Ⅱ) Coordination Polymer Containing Mixed Ligands: Synthesis,Crystal Structure and Properties

A novel compound, {[Cu2(nbdc)2(4,4'-bpy)2(H2O)2]·2H2O}n(H2nbdc = 4-nitrobenzene-1,2-dicarboxylic acid, 4,4'-bpy = 4,4'-bipyridine), was hydrothermally synthesized and characterized by elemental analysis, IR spectroscopy, thermogravimetric analysis(TGA), and single-crystal X-ray diffraction. The complex is of orthorhombic system, space group Pbcn with a = 32.222(7), b = 7.8503(16), c = 28.389(6), V = 7181(3)3, Dc = 1.720 g/cm3, Mr = 929.74, Z = 8, F(000) = 3792, μ = 1.273 mm-1, the final R = 0.0591 and wR = 0.1378 for 4548 observed reflections with I 2σ(I). The compound exhibits a 3D self-penetrating framework with bcu net topology, in which the(46·48)-networks are joined by the H2nbdc and 4,4'-bpy linkers.