Metal-directed Assembly of Two Distinct Coordination Polymers with 2,5-Furandicarboxylic Acid and 4,4'-Bipyridine

摘要

By using solvothermal method, two new metal coordination polymers based on 2,5-furandicarboxylic acid(H2FDA) ligand and 4,4'-bipyridine(bipy), [Cu(FDA)(4,4'-bipy)(DMF)]n·solvent(1) and {[Zn(4,4'-bipy)(FDA)(DMF)]·DMF}n(2), were produced and characterized by single-crystal X-ray diffraction analyses, elemental analyses, IR and powder X-ray diffraction. Compound 1 crystallizes in monoclinic space group P21/c with a = 11.104(2), b = 10.396(2), c = 18.772(4) , β = 96.20(3)o, V = 2154.2(7) 3, Dc = 1.378 g/cm3, C19H17 Cu N3O6, Mr = 446.90, F(000) = 916, μ(Mo Kα) = 1.05 mm–1, Z = 4, R = 0.0691 and wR = 0.1341 for 3537 observed reflections(I > 2σ(I)), and R = 0.1062 and w R = 0.1482 for all data. Compound 2 crystallizes in monoclinic space group C2/c with a = 29.779(6), b = 9.6417(19), c = 17.292(3), β = 105.69(3)°, V = 4779.9(16) 3, Dc = 1.445 g/cm3, C22H22N4O7 Zn, Mr = 519.81, F(000) = 2144, μ(Mo Kα)= 1.08 mm–1, Z = 8, R = 0.0641 and w R = 0.1007 for 2985 observed reflections(I > 2σ(I)), and R = 0.1028 and w R = 0.1112 for all data. Different coordination geometry of metal ions, square pyramid of Cu2+ and trigonal bipyramid of Zn2+, bring about different orientations of FDA2- ligands as well as 4,4'-bipyridine ligands, and furthermore distinct assembly structures for 1 and 2. The thermal stabilities of 1 and 2 are also investigated.