Two New 3D Zn(II)/Cu(II) Coordination Polymers Based on N,N '-Di(3-pyridyl)succinamide and Two Different Aromatic Dicarboxylates: Syntheses, Crystal Structures and Properties

Two new 3D transition metal coordination polymers [Zn(1,3-BDC)(L)(0.5)] (1) and [Cu(5-AIP)(L)(0.5)] (2) [L= N, N'-di(3-pyridyl)succinamide, 1,3-H2BDC = 1,3-benzenedicarboxylic acid, 5-H(2)AIP = 5-aminoisophthalic acid] have been hydrothermally synthesized and structurally characterized by elemental analyses, IR, TG and single crystal X-ray diffraction analysis. In complex 1, two carboxyl groups with monodentate modes from two 1,3-BDC ligands connect two Zn(II) ions to form a dinuclear {Zn-2} SBUs, then the adjacent {Zn-2} SBUs are connected by two pairs of 1,3-BDC ligands and two L ligands to construct a 3D coordination network with the large square-shape grids. Finally, the complex 1 exhibits a 4-connected CdSO4 topology with the threefold interpenetrating feature. Complex 2 is a 3D coordination framework constructed by the ligands L and 5-AIP anions, which represents a binodal (3,8)-connected {4(2).6}(2){4(4).6(10).7(9).8(5)} topology. The different coordination modes of metal ions and two dicarboxylates play important roles in the formation of coordination frameworks for title complexes. In addition, the thermal stabilities, the fluorescent properties of complexes 1-2 and the electrochemical behavior of complex 2 modified carbon paste electrode have also been investigated. Graphical Abstract Two new 3D coordination polymers, [Zn(1,3-BDC)(L)(0.5)] (1) and [Cu(5-AIP)(L)(0.5)] (2), have been hydrothermally synthesized. Complex 1 represents a threefold interpenetrating CdSO4 topology, complex 2 exhibits a binodal (3,8)-connected {4(2).6}(2){4(4).6(10).7(9).8(5)} topology. The different coordination modes of metal ions and dicarboxylates play important roles in the formation of final structures for title complexes. [GRAPHICS] .