Hydrothermal Synthesis and Crystal Structure of a 1D Cu（II） Coordination Polymer： Cu（bbpy）（H_2bptc）_n Constructed by a Tetracarboxylic Acid

摘要

The title compound [Cu（bbpy）（H2bptc）]n （bbpy = 4,4＇-dimethyl-2,2＇-bipyridine and H4bptc = 1,1＇-biphenyl-2,2？,3,3＇-tetracarboxylic acid） has been synthesized by hydrothermal reaction, and its structure was determined by X-ray diffraction and characterized by elemental analysis, IR spectrum and thermogravimetric analysis. The crystal is of triclinic, space group P1 with a = 11.2831（12）, b = 11.6718（13）, c = 11.7771（13）, α = 105.392（2）, β = 108.382（2）, γ = 112.397（2）o, CuC28H20N2O8, Mr = 576.00, V = 1222.4（2）3, Dc = 1.565 g/cm3, F（000） = 590, μ = 0.951 mm-1, S = 1.022 and Z = 2. The final refinement gave R = 0.0405 and wR = 0.1142 for 4270 observed reflections with I 2σ（I）. The title complex has a 1D [Cu（bbpy）（H2bptc）]n chain structure, in which the extensive hydrogen-bond interactions make the chain more stable. The neighboring parallel chains are further packed into a 2D layer structure via π···π stacking interaction between the pyridine rings of bbpy ligands. Moreover, the adjacent layers are interconnected by the C–H···π interactions to form a 3D metal-organic framework.