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.     

Synthesis,Crystal Structure and Iodine Capture of a Yttrium(Ⅲ) Coordination Polymer with 5-Aminonicotinic Acid

A new coordination polymer, [(C_(18)H_(16)N_4O_(18)Y_2)(H_2O)]n, has been hydrothermally synthesized by reacting yttrium(Ⅲ) nitrate with 5-aminonicotinic acid and ammonium oxalate at a molar ratio of 1:1:1, and its structure was determined by X-ray crystallography with the following data: monoclinic system, space group C2/c, a = 13.4507(10), b = 11.5829(9), c = 16.3448(9) ?, a= 89.983(6), β = 109.056(6), g = 90.047(6)°, Z = 4, V = 2406.92(14) ?~3, F(000) = 1536, D_c = 2.13079 g/cm~3, R = 0.0284(1695) and w R = 0.0787(2014). In the asymmetric unit of the compound, each Y(Ⅲ) ion is bonded to eight oxygen atoms from 5-aminonicotinic acid and oxalate groups and terminal-coordinated water molecule, resembling a highly distorted tricapped trigonal geometry. Adjacent three yttrium atoms are bridged by three identically independent oxalate groups in a side-by-side manner to form brickwall-like 2D sheets, and these sheets are further linked through π-π stacking interactions to generate a 3D supramolecular network. The photoluminescent property of the complex was investigated and the iodine capture studies show that the porous frameworks have reversible absorption ability for iodine molecule.     

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.     

Synthesis,Crystal Structure and Luminescent Property of a New Indium(Ⅲ) Coordination Polymer

A new coordination complex [In(pda)1.5(bpy)]_n(1, H_2pda = 1,4-phenylenediacetic acid, bpy = 2,2?-bipyridine) has been synthesized under hydrothermal conditions and characterized by IR spectrum, elemental analysis, PXRD and single-crystal X-ray diffraction analysis. Crystal data for the title complex are as follows: monoclinic system, space group P21/n with a = 11.8015(7), b = 15.9551(10), c = 11.8858(8) ?, β = 94.844(6)o, V = 2230.0(2) ?~3, Mr = 559.25, Z = 4, F(000) = 1124, Dc = 1.666 g/cm3, μ(Mo Kα) = 1.106 mm-1, R = 0.0269 and wR = 0.0569 for 4534 observed reflections with I 2σ(I). Complex 1 displays a 3D supermolecular structure based on the 1D zizag chains. Fluorescence spectrum measurement indicates that complex 1 shows strong fluorescence emission with a maximum peak at 447 nm in the solid state at room temperature.     

Solvothermal Synthesis,Crystal Structure and Luminescence Property of a 1D Silver(Ⅰ) Coordination Polymer

An unprecedented one-dimensional coordination polymer[Ag2(PhPO3H)2(DPPP)]n (1) based on phenylphosphonic acid (PhPO3H2) and 1,3-bis(diphenyphosphino)propane (DP...     

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.     

Synthesis,Crystal Structure and Luminescence of a Cadmium(Ⅱ) Coordination Polymer with 3,6-Connected rtl Topology

A new cadmium(Ⅱ) coordination polymer,[Cd(Hcna)_2]_n(1),was hydrothermally synthesized based on 5-(4-carboxyphenoxy)nicotinic acid(H_2cna) organic linker.X-ray singlecrystal diffraction determination reveals that 1 crystallizes in the monoclinic P2_1/c space group,with a = 10.101(2),b = 7.9139(17),c= 15.627(3) A,β= 103.364(3)°,V= 1215.4(4) A~3,Z=2,M_r= 628.81,D_c = 1.718 Mg/m~3,μ= 0.963 mm~(-1),F(000) = 628,the final R = 0.0177 and wR = 0.0432 for 2263 observed reflections with I 2σ(I).In 1,the Cd(Ⅱ) cations are connected by nicotiniate units to form a two-dimensional(2D) layer,and it is further linked through benzoate units to form a three-dimensional(3D) structure.Topologically,the structure of 1 represents a 3,6-connected 3D rtl topology.Furthermore,thermal stability and photoluminescent property of 1 have also been investigated.     

Crystal Structure and Luminescence with Relative Principles Calculation of a New One-dimensional Zn(Ⅱ) Coordination Polymer

A new coordination polymer, namely [ZnBr(bmb)(Hbmb)]_n(1)(Hbmb = 3-benzoimidazol-1-yl-benzoic acid), has been synthesized through a hydrothermal method and characterized by single-crystal X-ray diffraction, elemental analysis, infrared spectra, thermogravimetric analysis, and fluorescent characterization. The crystal structure is of triclinic system, space group P1 with a = 10.637(3), b = 11.660(3), c = 12.406(3) ?, α = 103.462(3), β = 105.144(3), γ = 110.513(3)o, V = 1298.5 ?~3, C_(28)H_(19)N_4O_4 ZnBr, Mr = 624.0, Z = 2, Dc = 1.588 g/cm~3, F(000) = 624, the final R = 0.0253 and w R = 0.0616 for 4385 observed reflections. The polymer features a chain-like structure and stabilizes itself by interchain hydrogen bonds to form a 2D supramolecular structure. 1 exhibits a strong blue emission with a fluorescent lifetime of 1.13 ns, and emitting mechanism of ligand-centered charge transition also was confirmed by the first-principle calculation.     

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.     

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,Crystal Structure and Luminescence of One-dimensional Homochiral Terbium (Ⅲ) Coordination Polymers

Enantiomerically pure lanthanide（Ⅲ）-based phosphonates are successfully synthesized by using（R）-or（S）-（1-phenylethylamino）-methylphosphonate acid（pempH₂）, namely, R-or S-[Tb₃（pempH₂）₂（pempH）₇]-Cl₂·H₂O（R-Tb or S-Tb）, crystallizing in chiral space group P2₁2₁2₁. Compound R-Tb shows a one-dimensional homochiral triple-stranded helical chain structure where the Tb（III） atoms are bridged by O-P-O units and μ₃-O（P） bridge. The thermal analysis, photoluminescence as well as optically active properties of compounds R-Tb and S-Tb have also been investigated.     

A Dinuclear Cd(Ⅱ) Cluster-based Coordination Polymer:Synthesis,Structure and Luminescence Property

One two-dimensional coordination polymer with a formula of {[Cd(L)(imidazole)(H_2O)](H_2O)}n(1) was obtained by the synthetic reactions in aqueous solution using a newly synthesized H_2L(H_2L = methyl-3-hydroxy-5-carboxy-2-thiophenecarboxylate) ligand.Compound1 crystallizes in monoclinic system,space group C2/c with a = 18.3176(11),b = 8.5366(9),c =8.4152(5) ?,β = 101.789(6)o,V = 2797.1(3) ?~3,D_c = 1.979 g/cm~3,C_(10)H_(12)N_2O_7SCd,Mr = 416.68 F(000) = 1648,μ = 1.745 mm~(-1),F(000) = 1648,the final R = 0.0323 and wR = 0.0604 for 2604 observed reflections with I 2s(I).Structure analyses reveal that the compound is constructed by dinuclear Cd(Ⅱ) clusters bridged by two hydroxyl oxygens of L~(2-)anions,which features a two-dimensional network with 4-connected sql topology.Furthermore,the compound exhibits high thermal stability and intense fluorescent emission,and could be explored for potentia luminescent materials.     

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.     

Synthesis and Crystal Structure of a 1-D Copper(Ⅱ) Polymer with 1-Hexylimidazole and Oxalate

A novel Cu(Ⅱ) complex has been prepared by means of self-assembly of CuCl2,1-hexylimidazole L and oxalic acid(H2OX) in the presence of triethylamine,and structurally characterized by X-ray diffraction analysis.In complex 1,1-D polymer chains are formed through pentacoordinated Cu(Ⅱ),oxalate and bridging chlorine atoms.In the crystal packing of 1,the imidazole ring head-to-tail π-π stacking interactions exist between 1-D polymer chains and extend the 1-D polymer chains into 2-D supramolecular layers.The fluorescence emission spectra of L and 1 were described.     

Synthesis and Crystal Structure of a New Pr(Ⅲ)–K(Ⅰ) Heterometallic Oxalate Coordination Polymer

A new 3D heterometallic coordination polymer, namely [K2Pr2(C2O4)4·H2O]n(1), has been successfully synthesized under hydrothermal conditions. X-ray single-crystal diffraction determination reveals that 1 crystallizes in monoclinic system, space group P21/n with a = 12.060(4), b = 8.493(3), c = 15.776(5)(A), β = 93.235(3)°, V = 1613.4(9) 3, Z = 4, Mr = 730.12, Dc = 3.006 Mg/m3, μ = 6.581 mm-1, F(000) = 1368, the final R = 0.0283 and w R = 0.0866 for 2939 observed reflections with I 2σ(I). Complex 1 features an unusual 3D heterometallic coordination framework, in which oxalates exhibit three different coordination behaviours. Moreover, powder X-ray diffraction and thermal properties for 1 have also been investigated.     

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).     

Crystal Structure and Fluorescent Study of a Terbium(Ⅲ) Coordination Polymer

A novel Tb(Ⅲ) coordination polymer [Tb(bpapO2)2(NO3)3]n [bpapO2 = N2,N6- bi(pyridin-2-yl)pyridine-2,6-diamine-N,N'-dioxide-dioxide] has been synthesized and it exhibits terbium's characteristic fluorescent emission under UV radiation of 326 nm at room temperature. X-ray structural determination indicates that each terbium(Ⅲ) ion, centered in TbO8 core, connects to three adjacent coordinate centers via a bi-dentate ligand bpapO2, forming a one-dimensional coordination polymer. The compound crystallizes in the triclinic system, space group P1, with a = 11.2271(5), b = 11.7997(5), c = 14.8016(6) Ⅲ, α = 72.7060(10), β = 89.9630(10), γ = 66.7680(10)o, Z = 2, Dc = 1.822 g/cm3, V = 1705.14(13) Ⅲ3, F(000) = 932, the final R = 0.0340 and wR = 0.0669 for 4812 observed reflections with I 2σ(I).