Urothermal Synthesis and Crystal Structure of a Zn(Ⅱ) Coordination Polymer with a 3-D Supramolecular Structure

A new metal-organic coordination polymer [Zn（hfipbb）（e-urea）]n（1,H2hfipbb = 4,4＇-（hexafluoroisopropylidene）bis（benzoic acid）,e-urea = ethylene urea） has been urothermally synthesized and characterized by elemental analysis and single-crystal X-ray diffraction.The title complex crystallizes in monoclinic,space group P21/c with a = 13.302（4）,b = 10.981（3）,c = 13.804（4） ,β = 93.587（5）°,V = 2012.3（10） 3,C20H14N2O5F6Zn,Mr = 541.72,Z = 4,Dc = 0.447 g/cm3, = 0.328 mm-1,F（000） = 272,R = 0.0340 and wR = 0.1107 for 4528 observed reflections（I 〉2σ（I））.In the structure of compound 1,two Zn（Ⅱ） ions are bridged by two carboxylate groups from two hfipbb ligands to form a dinuclear unit,and each dinuclear Zn（Ⅱ） unit is linked with its two adjacent dinuclear units through four hfipbb ligands into an infinite one-dimensional double-chain.The interesting structural feature of compound 1 is that the one-D double-chains are self-interconnected into a three-D supramolecular structure through hydrogen bonds between the coordinated e-urea molecules and carboxylate oxygen atoms（N1 and O2,N2 and O4）.

Urothermal Synthesis, Crystal Structure, and Luminescent Property of a New Zn(Ⅱ) Coordination Polymer Constructed from TerephthalicAcid and 5-Methyl-1H-tetrazole Ligands

A new luminescent Zn（II） compound, [Zn（pbdc）0.5（mtz）（DMPU）]n （1,H2pbdc = terephthalic acid, Hmtz = 5-methyl-1H-tetrazole, DMPU = N,N＇-dimethylpropyleneurea）, has been urothermally synthesized and characterized by elemental analysis, IR, X-ray powder diffraction （PXRD） and single-crystal X-ray diffraction. The title compound crystallizes in orthorhombic Pbca space group with α = 17.2649（5）, b = 10.4680（3）, c = 17.4457（7） ？, V = 3152.94（18） ？3, C12H17N6O3Zn, Mr = 358.71, Z = 8, Dc = 1.511 g/cm3, F（000） = 1480, μ = 1.579 mm-1, the final R = 0.0379 and wR = 0.0971 for 2785 observed reflections （I 〉 2σ（I））. Single-crystal X-ray structural analysis reveals that compound 1 features a 2D undulated layer with a 3-connected hcb topology. Moreover, the luminescent properties of 1 have also been investigated in the solid-state at room temperature.

Urothermal Synthesis of Zeolitic Tetrazolate-imidazolate Frameworks

Urothermal method was firstly used to synthesize zeolitic tetrazolate-imidazolate frameworks. By using 2-imidazolidone hemihydrate(e-urea) as solvent, a new compound, namely ZTIF-17 with GIS topology, has been obtained by mixing 5,6-dimethylbenzimidazole and 5-ethylthiotrazole ligands, and characterized by powder and single-crystal X-ray diffraction, and thermogravimetric(TG) analyses. In addition, ZTIF-17 exhibited strong photoluminescence at room temperature. The result suggests that urothermal method is powerful to construct new kind of porous materials.

Synthesis, Structure and Luminescent Property of a New Zn(Ⅱ) Coordination Polymer Based on 1,3,5-Benzenetricarboxylate and 4,4'-Bipyridine Ligands

A new Zn（II） coordination polymer [Zn3（BTC）2（4,4＇-bpy）（CO）2]n （1, H3BTC = 1,3,5-benzenetricarboxylic acid, 4,4＇-bpy = 4,4＇-bipyridine） has been prepared through urothermal reaction of zinc nitrate hexahydrate with 1,3,5-benzenetricarboxylic acid and 4,4＇-bipyridine, and characterized by elemental analysis, IR spectroscopy, TGA and powder XRD, and its crystal structure was determined by single-crystal X-ray diffraction analysis. The title compound crystallizes in the monoclinic system, space group C2/c, with a = 10.262（3）, b = 18.838（5）, c = 15.083（4）/k, fl = 99.203（4）°, V = 2878.3（14） A3, C30H14Zn3N2O14, Mr= 822.54, Z = 4, Dc = 1.898 g/cm3,μ = 2.561 mm-1,F（000） = 1640, R = 0.0363 and wR = 0.0932 for 2828 observed reflections （I 〉 2σ（I））. X-ray analysis shows that the asymmetric unit of the title compound contains two crystallographically unique Zn（lI） atoms which are connected by BTC3- ligands and 4,4＇-bpy coligands to form a 3D framework with 1D channels. The solid luminescence of ligand and the title complex was also studied at room temperature.

Urothermal Syntheses of Chiral Zincic Benzotriazole-5-carboxylate Frameworks for Iodine Uptake

So far,the synthesis of chiral framework with achiral organic ligand still faces great challenge.Herein,three new coordinated complexes[Zn(btca)Cl]·DMA·N(CH_(3))_(2)(1),[Zn(btca)(Ac^(-))]·N(CH_(3))_(2)(2)and[Zn(btca)]·H_(2)O(3)(DMA=N,N-dimethylacetamide,btca=benzotriazole-5-carboxylate acid)were synthesized via different methods.Single-crystal X-ray diffraction analysis revealed that compounds 1 and 2 were isostructural and showed achiral layer network with fes topology,and 3 presented a chiral three-dimensional framework with eta topology.The result of this work has demonstrated that urothermal synthesis will be promising means of constructing chiral framework with achiral building block.Compound 3 also displayed an excellent property of iodine uptake.