Synthesis,Structure and Luminescent Property of an Europium(Ⅲ) Coordination Polymer

A novel europium(Ⅲ) coordination polymer, [Eu3(pydc)3(SO4)(H2O)5(ox)0.5]·3H2O(1, H2 ox = oxalic acid, H2 pydc = pyridine-2,6-dicarboxylic acid), has been synthesized hydrothermally from the self-assembly of lanthanide ions(Eu3+) with the flexible oxalic acid and the rigid pyridine-2,6-dicarboxylic acid ligands, respectively. It crystallizes in the triclinic system, space group P1 with a = 11.225(4), b = 12.390(5), c = 13.752(5)A, α = 89.228(7), β = 71.142(6), γ = 75.552(6)°, Dc = 2.317 g/cm3, μ = 5.480 mm-1, F(000) = 1150, Z = 2, the final R = 0.0351 and w R = 0.0949 for 8782 observed reflections with I 2σ(I). Structural analysis reveals that complex 1 exhibits a three-dimensional metal-organic framework via π-π stacking interactions. In addition, complex 1 displays a red fluorescence emission in the solid state at room temperature, which corresponds to the 5D0 → 7F2 transition of Eu3+ ions.     

Synthesis,Structure and Luminescent Property of a New bnn-type Zn(Ⅱ) Coordination Polymer

A new Zn(Ⅱ) coordination polymer, namely [Zn(Htci)(bib)0.5(H2O)]n·nH2O(1, H3 tci = tri(2-carboxyethyl)isocyanurate, bib = 1,4-bis(imidazol-1-ylmethyl)-butane) has been synthesized by combining H3 tci and bib ligands with Zn(Ⅱ) salts under solvothermal conditions. The title compound crystallizes in monoclinic, space group P21/c with a = 13.3424(7), b = 7.9051(5), c = 20.4650(12) , β = 101.935(5)o, V = 2111.8(2) 3, C17H24N5O11 Zn, Mr = 539.8, Z = 4, Dc = 1.698 g/cm3, F(000) = 1116, μ = 1.236 mm-1, the final R = 0.0398 and wR = 0.00879 for 3722 observed reflections(I 2■(I)). X-ray structural analysis reveals that compound 1 exhibits a three-dimensional(3D) pillar-layered framework, and can be simplified into a 5-connected bnn topological network. Moreover, the luminescent properties for compound 1 were also studied at room temperature.     

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

A new Cd(ΙΙ) coordination polymer with 2-nitroterephthalic acid(H2npa) and 1,4-bis(2-methyl-imidazol-1-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 w R = 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.     

A New Mn(Ⅱ) Coordination Polymer with a Rare Polyrataxane Topology: Synthesis,Crystal Structure and Luminescent Property

A novel coordination polymer [Mn(bcp)(bib)0.5]n(1, H2 bcp = 1,3-bis(4-carboxyphenoxy)propane and bib = 1,4-bis(imidazol-1-yl)benzene) was synthesized under hydrothermal conditions, and was characterized by single-crystal X-ray diffraction analyses and further characterized by elemental analyses, IR spectroscopy and powder X-ray diffraction(PXRD).Complex [Mn(bcp)(bib)0.5]n(1) is of triclinic system, space group P1 with a = 7.320(5), b =11.871(5), c = 13.932(5) ?, α = 111.125(5)°, β = 99.658(5)°, γ = 101.104(5)°, Z = 2, V= 1070.3(9)?3 Mr = 474.34, Dc = 1.472 g/cm3, F(000) = 488, μ = 0.660 mm?1, the final R = 0.0353 and wR =0.0.984 for 4373 observed reflections with I 2?(I). Structure analysis reveals that complex 1 displays a rare 2 D + 2 D → 2 D polyrataxane topology. Moreover, the luminescent property for 1 was investigated at room temperature.     

Synthesis,Crystal Structure and Luminescent Property of a Ag(Ⅰ) Coordination Polymer with a 3D Sandwich-like Framework

A new coordination polymer,{[Ag_2(bpp)_2(H_2O)_2]·bpdc·3H_2O}_n,derived from the ligand biphenyl-4,4'-dicarboxylic acid(H_2bpdc),has been obtained through a hydrothermal technique(bpp = l,3-bis(4-pyridyl)propane).Its single-crystal structure has been characterized by single-crystal X-ray diffraction,powder XRD,FT-IR,TGA and elemental analysis techniques.The single-crystal X-ray diffraction reveals that complex 1 consists of 1D infinite[Ag(bpp)(H_2O)]_n~(n+)cationic chains,2D anionic layer constructed by bpdc anions and free water which provide charge compensation in the crystal structure.The 1D infinite[Ag(bpp)(H_2O)]_n~(n+) cationic chains and 2D anionic layer are further stacked in-ABAB- fashion through intermolecular H-bonding to form a 3D sandwich-like framework.In addition,the luminescent property of complex 1 in the solid state at room temperature was investigated.     

Synthesis,Structure and Luminescence Property of a New Two-dimensional Znic(Ⅱ) Coordination Polymer

Based on 5-dimethylamino-isophthalic acid(H_2dia) and 1,2-bis(4-pyridyl)ethylene(bpe) mixed linkers, a new d~(10)-configuration Zn(Ⅱ) coordination polymer material, [Zn(dia)(bpe)(H_2O)]n(1), was synthesized. In the asymmetric unit, there are one Zn~(2+) ion, two dia~(2-)anions, one neutral bpe linker and one free H_2O molecule. In the complex, adjacent Zn~(2+) ions are alternately bridged by the dia~(2-)dianions to generate chains which are further connected by flexible bpe ligands to form a two-dimensional(2 D) layer structure. In topology, the structure of 1 represents a non-interpenetrating 4-connected sql topology. Moreover, infrared spectroscopy, elemental analyses, thermogravimetric analysis, powder X-ray diffraction, solid UV-Vis absorption spectra and photoluminescent property of 1 are also investigated.     

Solvothermal Synthesis, Crystal Structure and Luminescent Property of a Dy（Ⅲ） Coordination Polymer Constructed by 1,2,4,5-Benzenetetracarboxylic Acid

A three-dimensional coordination polymer {[Dy(H2btec)2/4(btec)3/6(H2O)]·2H2O} n has been synthesized through the reaction of DyCl3·6H2O and 1,2,4,5-benzenetetracarboxylic acid by solvothermal technique, and the crystal structure was determined by X-ray diffraction. The Dy(Ⅲ) coordination polymer crystallizes in monoclinic, space group P21/n with a=10.7063(1), b=7.1491(1), c=17.1197(3), α=90, β=97.10, γ=90°, V=1300.31(3)3 , C10H9DyO11 , Dc=2.389g/cm3 , Z=4, F(000)=892, the final R=0.0165 and wR=0.0448 for I > 2σ(I). The title coordination polymer possesses a three-dimensional framework consisting of nine-coordinate Dy(Ⅲ) centers and two kinds of coordination modes for the 1,2,4,5-benzenetetracarboxylic acid ligands. Every btec4- ligand (deprotonated four protons from 1,2,4,5-benzenetetracarboxylic acid) in the title coordination polymer can clamp three Dy atoms like forceps, which could make the Dy atoms closer in the area of metal-metal interaction. The 3-D framework of the coordination polymer has many channels occupied by the free guest water molecules, and the hydrogen bonds between the coordinated carboxylic groups and guest water molecules could stabilize the crystal structure of the title coordination polymer. In addition, the luminescence properties were also studied.     

A Chain Cadmium(Ⅱ) Coordination Polymer with Diacylhydrazide: Synthesis,Crystal Structure and Luminescent Property

A novel Cd(Ⅱ) coordination polymer with diacylhydrazide ligand N,N?-bis(3-methoxysalicyl)-2,6-pyridinedicarbohydrazide(H_6msphz),[Cd_2(H_2msphz)(Py)_4]_n(1,Py = pyridine) has been synthesized through solvothermal reaction and structurally characterized by single-crystal X-ray diffraction,IR,TGA and PXRD investigations. It crystallizes in triclinic system,space group P1,with a = 11.0230(11),b = 11.7264(15),c = 17.3395(14) ?,α = 70.520(9),β = 84.806(7),γ = 81.965(9)°,V = 2089.9(4) ?~3,Dc = 1.638 gcm~(–3),μ = 1.083 mm~(-1),F(000) = 1032,Z = 2 and S = 1.040. In complex 1,the H_2msphz4-ligand uses not only its coordinated pocket to catch one Cd(Ⅱ) ion,but also its two terminal groups to chelate other two Cd(Ⅱ) ions,leading to the formation of a chain structure. The adjacent chains are further assembled together by two kinds of π-π interactions between the Py rings,resulting in the finial double layered supramolecular structure. In addition,complex 1 is found to show photoluminescence in the solid state at room temperature,which can be ascribed to the intraligand π→π* transitions.     

Hydrothermal Synthesis,Crystal Structure and Thermal Property of a Coordination Polymer Constructed by Ce(Ⅲ) and Succinate Ions

A new three-dimensional coordination polymer [Ce_2(C_4H_4O_4)_3(H_2O)_2]_n·3.2 nH_2 O, constructed by Ce(Ⅲ) ion and succinate ion and lattice water molecules has been synthesized under hydrothermal conditions. It crystallizes in triclinic system, space group P1 with a = 7.8865(6), b = 12.0260(8), c = 12.2598(9) ?, α = 112.456(2)o, β = 90.046(2)o, γ = 100.423(2)o, Mr = 722.14, V = 1053.73(13) ?~3, Z = 2, Dc = 2.276 g/cm~3, μ = 4.35/mm, F(000) = 696, GOF = 1.029, R = 0.0203 and w R = 0.0570. The asymmetric unit contains two Ce~(3+) cations and both of them are nine-coordinated and their coordination geometries can be described as two distorted monocapped square antiprisms. In the title compound, a three-dimensional coordination network with one-dimensional hexagon honeycomb-like channels along the a axis is generated. TG measurement has been carried out, and its result analysis along with the powder XRD determination indicates the residue to be CeO_2.     

Synthesis,Crystal Structure and Luminescence of a New Europium(Ⅲ) Coordination Polymer with Imidazole Carboxylic Ligand

A new luminescent compound, {[Eu3(L)4(H2 O)8]·(NO3)·4 H2 O}n(1, H2 L = 2-(pyridine-3-yl)-imidazole-4,5-dicarboxylic acid) has been solvothermally synthesized and structurally characterized by elemental analyses, IR and single-crystal X-ray diffraction. 1 crystallizes in monoclinic, space group C2/c with a = 21.0183(19), b = 9.5227(6), c = 28.227(3) ?, β = 106.885(5)o, V = 5406.1(8) ?~3, Dc = 2.038 g/cm~3, μ = 3.358 mm~(-1), Mr = 1658.76, F(000) = 3247, Z = 4, the final R = 0.0488, wR = 0.1195 and S = 1.075. The deprotonated L ligand employs a μ4-bridge to coordinate with three Eu(Ⅲ) ion, forming a wave-like(3,4)-connected 2 D structure. The existence of π···π interaction between the pyridine rings of L ligands leads to an infinite 3 D network. Furthermore, the thermal analysis, powder diffraction and solid-state photoluminescent properties of compound 1 have also been investigated.     

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 a = 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 2?(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.     

Synthesis,Crystal Structure,Thermal Stability,Luminescence and Magnetic Property of a New Mn~Ⅱ Coordination Polymer

One new coordination polymer, [Mn(Hbtc)(bpy)(H_2O)_2]_n 1, was synthesized by the reaction of manganese(Ⅱ) salt under pH-controlled hydrothermal conditions with unsymmetrical polycarboxylic acid of 1,2,4-benzenetricarboxylic acid(H_3btc) and 2,2?-bipyridine(bpy). The structure of complex 1 was characterized by single-crystal X-ray diffraction, IR spectra, powder X-ray analysis, thermal gravimetric analysis(TGA), UV-Vis spectrometry, photoluminescence and magnetic susceptibility. Complex 1 is a one-dimensional(1D) polymeric single-chain structure. Photoluminescence property is quite similar to the bpy ligand. Magnetic susceptibility measurement indicates that 1 shows a weak ferromagnetic coupling between the Mn~Ⅱ ions.     

Synthesis,Crystal Structure and Fluorescence Property of a Zinc(Ⅱ) Coordination Polymer with a Theoretical Calculatio

We have designed and synthesized a new luminescent coordination polymer[Zn₂(NO₃)(NCP)₃(H2O)₃]n·2 nH₂O(1,HNCP=2-(2-carboxyphenyl)imidazo-[4,5-f]-1,10-phenanthroline)under hydrothermal conditions,which has been structurally characterized by single-crystal X-ray diffraction analyses.1 crystallizes in monoclinic,space group P2₁/n,with a=13.7748(3),b=19.2651(4),c=19.9543(4)?,β=95.339(2)o,V=5272.35(19)?³,C₆₀ H_39.73 N₁₃ O_13.33 Zn₂,M_r=1286.80,D_c=1.621 g/cm³,Z=4,μ(Mo Ka)=2.118,F(000)=2629,the final R=0.0598 and w R=0.1483.In 1,the organic ligand NCP-displays two different bridging modes to connect adjacent Zn(II)ions into a 1 D chain along the c-direction.Photoluminescent analyses reveal that 1 exhibits a strong green emission with a fluorescent lifetime of 5.57 ns.The first-principle calculation results show that the luminescence mainly originates from ligand-centered charge transition.     

Synthesis,Crystal Structure and Luminescence Study of a New Two-dimensional Mn(Ⅱ) Coordination Polymer

The coordination polymer [Mn_2(cipt)_2(aic)_2]_n(cipt = 2-(3-chlorophenyl)-1Himidazo[4,5-f][1,10]phenanthroline, aic = 5-amino-isophthalic acid) has been obtained from hydrothermal reaction and characterized by elemental analysis, IR, TG and single-crystal X-ray diffraction. The title compound crystallizes in the triclinic system, space group P1, with a = 11.523(3), b = 12.162(3), c = 18.706(5) ?, β = 81.789(5)o, V = 2455.2(1) ?3, C_(54)H_(32)Cl_2Mn_2N_(10)O_8, Mr = 1129.68, Z = 2, Dc = 1.528 g/cm3, μ = 0.692 mm-1, F(000) = 1148, R = 0.064 and wR = 0.145 for 9571 observed reflections(I 2σ(I)). In this polymer, the Mn(Ⅱ) atoms adopt different coordination modes. The Mn(1) atom is five-coordinated, forming a distorted tetragonal pyramidal geometry. Mn(2) atom is six-coordinated to get a distorted octahedral geometry, which is different from the Mn(1) atom. Each Mn(Ⅱ) atom is linked by aic ligands with neighboring Mn(Ⅱ) atoms, forming an infinite one-dimensional(1D) double-chain structure. The existence of N–H···O hydrogen bonding interactions leads the 1D chains to generate a 2D structure. Luminescent properties for the ligand cipt and compound 1 have also been discussed in detail.     

Hydrothermal Synthesis,Crystal Structure and Luminescence Property of a 2D Manganese(Ⅱ) Coordination Polymer

Solvothermal reactions of MnCl_2·4H_2O with(pyridin-2-yl)methyl 4-(2-(4-((pyridin-2-yl)methoxy)phenyl)diazenyl)benzoate(L1) via an in situ ligand transformation reaction produced a new coordination polymer, {[Mn_(2.5)Cl_3L_2(H_2O)]·H_2O}_n(1, where HL = 4-(2-(4-((pyridin-2-yl)methoxy)phenyl)diazenyl)benzoic acid). The L1 ligand was decomposed in situ to L~- which was coordinated with Mn(Ⅱ) to form compound 1 in the solvothermal synthesis process. Complex 1 was characterized by IR spectroscopy, powder X-ray diffraction and single-crystal X-ray diffraction.Compound 1 possesses a 2D network. In addition, stability and photoluminescent property of 1 were also investigated.     

Synthesis and Crystal Structure of a New(6,3)-Connected Ni(Ⅱ) Coordination Polymer

The coordination polymer [Ni(dpa)(bpp)]n(H2dpa = 2,4'-biphenyl-dicarboxylic acid,bpp = 1,3-di(4-pyridyl)propane) was hydrothermally prepared and characterized by single-crystal X-ray diffraction,FTIR spectra,elemental analysis and thermal analysis.The crystal is of triclinic system,space group P1 with a = 12.516(5),b = 12.943(5),c = 15.130(5) ,α = 94.331(5),β = 91.827(5),γ = 108.382(5)°,C54H44N4Ni2O8,Mr = 497.18,V = 2315.3(15) 3,Dc = 1.426 g/cm3,F(000) = 1032,μ = 0.875 cm-1,Z = 2,the final R = 0.0496 and wR = 0.1100 for 5365 reflections with Ⅰ 2σ(Ⅰ).X-ray diffraction analysis reveals that the carboxylate group of 2,4'-diphenic acids acting as bridging ligands adopts two coordination modes:bis-mondentate and bidentate chelating.The compound exhibits a two-dimensional(6,3)-connected architecture.