Synthesis, Structure and Luminescent Property of a 2D Cd(Ⅱ) Coordination Polymer Based on Mixed-ligands of 1,3-Bis(imidazol)propane and Pyridine-3,5-dicarboxylic Acid

A new Cd（Ⅱ） coordination polymer, namely, [Cd（1,3-bip）（3,5-pdc）]n （1,3-bip = 1,3-bis（imidazol）propane and 3,5-pdc = pyridine-3,5-dicarboxylic acid） has been synthesized under hydrothermal conditions. Compound 1 was characterized by infrared spectrum, elemental analysis, powder X-ray diffraction （PXRD） and single-crystal X-ray diffraction analysis. It crystallizes in monoclinic, space group P21/c with a = 1.40178（7）, b = 1.72502（12）, c = 1.41635（6） ran, β = 92.653（4）°, V = 3.4212（3） nm3, Z = 4, C16HIsCdNsO4, Mr = 453.73, Dc = 1.762 g/cm3, F（000） = 1808,μ = 1.310 mm1, R = 0.0899 and wR = 0.1945. In compound 1, each 3,5-pdc ligand links three Cd（lI） ions and each Cd（Ⅱ） attaches to bip ligands to form a complicated 2D double-layer structure. In addition, the thermal stability and luminescent property of 1 have been studied in the solid state at room temperature.

A Novel 3D Cd(II) Coordination Polymer with an Unusual 3-Connected(8~2·10) Lig Net: Synthesis, Crystal Structure and Luminescent Properties

A new 3D Cd(II) coordination polymer, [Cd(Hpidc)]n(1, H3 pidc = 2-(pyrid-2-yl)-1H-imidazole-4,5-dicarboxy acid), has been prepared and characterized by elemental analysis, IR spectra, PXRD, and single-crystal X-ray diffraction. Compound 1 crystallizes in orthorhombic, space group Fdd2 with a = 22.833(9), b = 25.536(9), c = 7.437(3) A, V = 4336(3) A3, Z = 16, Dc = 2.105 Mg·m-3, μ = 2.025 mm-1, F(000) = 2656, and the final R = 0.0261 and w R = 0.0636. The structure determination reveals that 1 exhibits a rare 3D 3-connected lig net with a point symbol of(82·10). In addition, the solid state properties such as thermogravimetric analysis and luminescence of 1 were also studied.

Hydrothermal Synthesis, Crystal Structure and Luminescent Property of a New Cd(Ⅱ) Coordination Polymer with Four-fold Interpenetrated dia Topology

A new Cd（II） coordination polymer with 2-nitroterephthalie acid （H2npa） and 1,4- bis（2-methyl-imidazol-l-yl） butane （bib） has been prepared by hydrothermal synthesis and characterized by single-crystal X-ray diffraction, IR and EA. Complex [Cd（npa）（bib）]n （1） is of orthorhombic system, space group Pcca with a = 16.1750（5）, b = 9.8764（5）, c = 15.5890（3） A, V = 2490.4（2） A3, Z = 4, Mr = 539.82, Dc = 1.440 g/cm3, F（000） = 1088,μ = 0.918 mm-1, the final R = 0.0320 and wR = 0.0775 for 2253 reflections with I 〉 2σ（I）. X-ray diffraction analysis reveals that complex 1 displays a four-fold interpenetrated dia topology. Furthermore, the luminescent property for complex 1 is also investigated in solid state at room temperature.

Synthesis and Crystal Structure of an Adipate-bridged Dinuclear Cadmium(Ⅱ)Polymer with 2-Methylpyrazino[2,3-f][1,10]-phenanthroline(mpphen)Terminal Ligands

A metal-organic coordination polymer, [Cd（C15H10N4）（C6H8O4）]2n （1, C15H10N4： 2-methyl-pyrazino-[2,3-f][1,10]-phenanthroline （mpphen）, C6H8O4： adipate）, was synthesized via hydrothermal synthesis. The polymer was characterized by elemental analysis, IR, TG and single-crystal X-ray diffraction. X-ray diffraction shows that 1 is a cadmium polymer constructed by adipate-bridged dmuclear clusters, and each adipate connects two clusters to form a two-dimen- sional planar structure. Crystal data for 1： monoclinic, space group C2/c, a = 22.403（9）, b = 16.039（6）, c = 13.808（6） A, β= 125.262（6）°, V = 4051（3） A3, Mr = 502.79, Dc = 1.649 g/eraa, μ（MoKa） = 1.114 mm^-1, F（000） = 2016, Z = 8, the final R = 0.0509 and wR = 0.1054 for 1509 observed reflections （I 〉 2σ（I））.

Synthesis, Crystal Structure and Thermal Stability of a New Cadmium(II) Polymer Based on 1H-pyrazole-3-carboxylic Acid Ligand

A novel Cd（Ⅱ） coordination polymer, [CdCI（Hpc）H2O]n （1, H2pc = 1H-pyrazole-3- carboxylic acid）, was synthesized by the reaction of CdCl2·2.5H2O with H2pc, and structurally characterized by IR spectrum, UV-Vis spectrum, elemental analysis, single-crystal X-ray diffraction, as well as thermal analysis. Compound 1 crystallizes in monoclinic, P21/n space group with α = 7.0304（3）, b = 10.3047（3）, c = 10.6446（4） A, β= 107.174（4）°, F = 736.78（5） A^3, Z = 4, C4HsCdClN2O3, Mr = 276.95, Dc = 2.497 g/cm%3, F（000） = 528.0,μ= 3.281 mm^-1, R = 0.0169 and wR = 0.0387. The central metals adopt distorted octahedral geometry. Carboxyl groups of the ligand connect Cd（Ⅱ） into a one-dimensional chain, which further constructs a two-dimensional network by halogen bridging. Such two-dimensional structures are finally connected into a three-dimensional supramolecular architecture due to the hydrogen bonds and intermolecular π…π interactions. In addition, complex 1 has high thermal stability.

Cd/Mn(Ⅱ) Complexes with Heterocyclic Substituted 1,2,4-Triazole Ligands：Syntheses,Crystal Structures,and Luminescence Properties

Based on a 3-（pyridine-2-yl）-4H-1,2,4-triazole ligand（Hpytr）, one 2D Cd（Ⅱ） coordination polymer [Cd I（pytr）]n（1） and one 2D Mn（Ⅱ） coordination polymer [Mn（N3）（pytr）（H2O）]n（2） have been synthesized and characterized by X-ray crystallography, elemental analysis, and fluorescence spectroscopy. 1 shows a layer coordination architecture linked by pytr ligand, and the Cd（Ⅱ） centers display slightly distorted square pyramid coordination geometries. Complex 2 shows a 2D pillared-layer coordination architecture bridged by N3-and pytr, and the Mn（Ⅱ） centers display slightly distorted octahedral geometries. The luminescent properties of 1 and the PXRD and thermal stability of complexes 1 and 2 were measured briefly.

Temperature-controlled Structural Diversity of Two Cd(Ⅱ) Coordination Polymers Based on the Dicarboxylate Ligand

Two new 3-D Cd(Ⅱ) coordination polymers with p-phthalic acid (p-BDC) and 4,4′-dipyridylamine (4,4′-dpa),namely[Cd_(2)(p-BDC)_(2)(4,4′-dpa)_(2)]_(n) 1 and{[Cd(p-BDC)(4,4′-dpa)(H_(2)O)]·4H_(2)O}_(n) 2 were successfully synthesized under hydrothermal conditions at 120 and 140℃.They were characterized by single-crystal X-ray diffraction,IR,PXRD and TGA.It was further characterized by Hirshfeld surface (HS)analysis for complex 2.The luminescent properties of the complexes have also been investigated.