Synthesis,Crystal Structure and Characterization of a New Coordination Polymer from the Self-assembly of CoCl_2 Salt and Flexible Ligand 1,3-Bis(4-pyridyl)propane

A new 1D coordination polymer [Co（bpp）3Cl2（H2O）2]n 1 （bpp = 1,3-bis（4-pyridyl）-propane） was synthesized and characterized by elemental analysis,IR spectrum and single-crystal X-ray diffraction. The crystal belongs to the orthorhombic system,space group Ibca with a = 16.569（9）,b = 17.240（10）,c = 27.087（16） ,V = 7738（8） 3,Z = 8,Dc = 1.306 g/cm3,Mr = 760.65,λ（MoKa） = 0.71073 ,μ = 0.623 mm1,F（000） = 3192,the final R = 0.0678 and wR = 0.2011. The Co（II） atom is coordinated in a slightly distorted octahedral CoN4Cl2 geometry by two Cl atoms in the axial positions,four N atoms from the two bridging bpp ligands and two pendant bpp ligands. The CoN4Cl2 octahedra are connected by the bridging bpp ligands to form a 1D neutral coordination polymer chain. The chains are linked by face-to-face π-π interactions between adjacent pendant bpp ligands to give rise to a 3D supramolecular architecture. The photoluminescent investigation indicates that the emission of 1 is attributed to ligand-centered emission. The variable-temperature magnetic susceptibility measurement shows weak antiferromagnetic behavior in the coπmplex.

Synthesis and Crystal Structure of a One-dimensional Mn(Ⅱ) Coordination Polymer with 1,3-bis(4-pyridyl)propane

A new 1D zigzag chain coordination polymer, { [Mn（bpp）（bac）2]·（CHaCN）}n 1 （bpp = 1,3-bis（4-pyridyl）propane, Hbac = benzoylacetone）, has been synthesized and characterized by FT-IR spectroscopy, thermal analysis and X-ray single-crystal diffraction. In the molecular structure, all Mn atoms locate in an octahedral geometry. The guest CH3CN molecules are included in the 1D channels of the 3D packing structure of 1. Crystal data： C35H35MnNaO4, Mr = 616.60, monoclinic, space group P211c, a = 17.691（4）, b = 18,955（4）, c = 9.712（6） A, β = 93.91（3）°, V = 3249.31（1） A^3, Z = 4, Dc = 1.260 g/cm^3, F（000） = 1292, 20max = 54.9°, μ = 0.447 mm^-1, the final S = 1.020, R = 0.0693 and wR = 0.1497.

双联咪唑和对苯二甲酸构筑的二重穿插锌（Ⅱ）配位聚合物{[Zn（bbi）（tpa）]n}的合成及其荧光性能

以1，3-二咪唑丙烷（bbi），对苯二甲酸（tpa）和Zn（NO3）2·6H2O为原料，经水热法合成了具有二重穿插的二维锌（Ⅱ）配位聚合物{[Zn（bbi）（tpa）]n（1）}，其结构和性能经IR，元素分析，XRD，TG和FL表征。l属正交晶系，Pbca空间群，晶胞参数Ⅱ=1．06726（4）nm，b=1．58618（6）nm，c=2．02582（5）nm，Dc=1．572g·cm^-3，V=3．429nm^3，Z=8，R，=0．0586，wR2=0．1461。1中每个Zn（Ⅱ）作为一个四连接的节点，通过tpa和bbj桥联连接形成了二维（4，4）网格结构，相邻的两个二维（4，4）网格层通过相互穿插，形成一种有趣的二重穿插二维构型。1的初始分解温度为300℃；室温固体荧光测定结果表明：在330nm波长激发下，1的最大发射波长位于421nm。

Synthesis and Crystal Structure of One New Coordination Polymer: [Ni(qptc)_(0.5)(bpp)( H_2O)]_n

Solvothermal reaction of aromatic terphenyl-2,5,2＇,5＇-tetracarboxylic acid （H4qptc） ligand and the transitional metal cation of Nin in the presence of 1,3-bi（4-pyri- dyl）propane （bpp） affords one new coordination polymer, [Ni（qptc）0.5（bpp）（H2O）], （1）. The structure has been determined by single-crystal X-ray diffraction analysis and further characterized by elemental analysis, IR, TGA, and magnetism. The qptc4- acts as a H-shaped ligand linking the NiⅡ centers together to form a 2D polymeric [Ni（qptc）0.5], layer consisting of alternately arranged left- and right-handed helical chains. Each 2D polymeric [Ni（qptc）0.5], layer is further linked through the bridging bpp ligands, thus resulting in a unique （3,4）- connected network with the （62.8）（62. 84） topology. The crystal of 1 crystallizes in monoclinic, space group C2/c with a = 16.088（5）, b = 14.913（5）, c = 18.849（6） A, β= 100.982（4）, V= 4439（2） A3, Z= 8, C24H21N2NiO5, Mr = 476.14, Dc = 1.425 g/cm3, F（000） = 1976 and μ（MoKa） = 0.912 mm-1. The final R = 0.0584 and wR = 0.1131 for 3894 observed reflections with Ⅰ 〉 20（I） and R = 0.1224 and wR = 0.1279 for all data.

Synthesis, Crystal Structure, and Photoluminescent Property of a 2-Fold Interpenetrating Znic(Ⅱ) Coordination Polymer with 2,5-Dicarboxylic Acid-3,4-ethylene Dioxythiophene

A three-dimensional coordination polymer,[Zn2(L)2(bpp)(H2O)2]n(H2L=2,5-dicarboxylic acid-3,4-ethylene dioxythiophene,bpp=1,3-di(4-pyridyl)propane),was synthesized with high yield under solvothermal reaction conditions and structurally characterized by elemental analysis,infrared spectra,thermogravimetric analysis,powder X-ray diffraction and single-crystal X-ray diffraction analysis.It crystallizes in orthorhombic space group Pnma with a=16.6542(9),b=18.0868(10),c=10.7528(5)?,V=3239.0(3)?3,Z=4,Dc=1.684 g/cm3,Mr=821.38,Dc=1.684 g/cm3,μ=1.683 mm-1,F(000)=1672,R=0.0466,wR=0.0933 and S=1.066.The compound exhibits a three-dimensional structure,which can be simplified into a 2-fold interpenetrated pcu topological network.Moreover,it displays luminescence emission in the solid state at room temperature.

Hydrogen Bond Networks of Three Cobalt Coordination Polymers Based on Bis（triazole） and Benzenebiscarboxylate Isomers

Three hydrogen bond networks of cobalt（II） coordination polymers { [Co（btp）2（H2O）2]·2（l,2-Hbdc）·2H2O}n （1）, { [Co（btp） （1,3 -bdc）（H2O）]·1.5H2O } n （2） and { [Co（btp）2（H2O）2]·（1,4-bdc） } n （3） were synthesized by 1,3 -bis（1,2,4- triazol- 1-yl）propane （btp） and benzenedicarboxylate position isomers. Complex 1 is comprised of [Co（btp）z（H20）]2n＋ 1D cation chains, 1,2-Hbdc anions and lattice water molecules. The structure of 2 is an undulated 2D （4,4） network. Two adjacent networks interpenetrate each other to form a new 2D double-layers network which is sustained by the hydrogen bond interactions in 2. Complex 3 is comprised of [Co（btp）z（H20）]n2n＋ 1D cation chains and 1,4-bdc2 anions. These [Co（btp）2（H2O）]n^2＋ 1D cations and 1,2-Hbdc-/1,4-bdc2- anions form 2D hydrogen bond networks in 1 and 3. The thermal stabilities of 1, 2 and 3 were investigated.