A New 3-D Sr(Ⅱ) Complex:Two-step Solvothermal Synthesis,Structure and Luminescent Properties

The title complex [HSr_3(pda)_3(H_2O)_3Cl]n(1, H_2pda = pyridine-2,6-dicarboxylic acid) has been prepared under two-step solvothermal conditions. It has been characterized by X-ray single-crystal diffraction, IR, TGA-DSC and elemental analysis. The crystal belongs to the trigonal system, space group R-3 with a = 14.484(2), b = 14.484(2), c = 21.970(4) ?, γ = 120 o, V = 3991.4(11) ?~3, C_(21)H_(16)ClN_3O(1)_5Sr_3, M_r = 848.68, Z = 6, Dc = 2.118 g/cm~3, μ = 6.175 mm~(-1), F(000) = 2484, the final R = 0.0457 and w R = 0.1139. This complex possesses a 3-D structure constructed from [HSr_3(pda)_3(H_2O)_3Cl]_2 units and connected by coordinated carboxylate groups of pda2-ligands. The topology symbol of this network is(4~(12)6~3). Luminescent property of the title complex has been investigated at room temperature.     

Synthesis and Crystal Structure of a Two-dimensional Coordination Polymer Constructed by Thiophene-2,5-dicarboxylic Acid and 1,4-Bis(imidazol-1-yl)-butane

<正>A metal-organic coordination polymer [Cd(tdc)(bimb)(μ_2-H_2O)]n (H_2tdc = thiophe- ne-2,5-dicarboxylic acid, bimb = 1,4-bis(imidazol-1-yl)-butane) 1 has been hydrothermally synthe- sized and characterized by elemental analysis, IR, TG, luminescence spectrum and single-crystal X-ray diffraction. Colorless crystals crystallize in the triclinic system, space group P_1~- with a = 5.8945(3), b = 10.3129(5), c = 11.2226(5), α = 95.1430(10), β = 97.9020(10), γ = 90.5910(10)°, V = 672.84(6) ~3, C_(11)H_(11)CdN_2O_5S, M_r = 395.68, D_c = 1.953 g/cm~3, μ(MoKα) = 1.797 mm~(-1), F(000) = 390, Z = 2, the final R = 0.0209 and wR = 0.0508 for 2514 observed reflections (I > 2σ(I)). The structure of 1 exhibits a two-dimensional layer-like structure.     

Structures and Photoluminescent Properties of Two Complexes Based on Dipyrido[3,2-a:2?,3?-c]phenazine and 2,4?-Biphenyldicarboxylic Acid

ABSTRAC Two new complexes [Cd(2,4?-bpdc)(DPPZ)]_(2n)·n H_2O(1) and [Zn(2,4?-Hbpdc)_2(DPPZ)]· H_2O(DPPZ = dipyrido[3,2-a:2?,3?-c]phenazine, 2,4?-H_2bpdc = 2,4?-biphenyldicarboxylic acid) have been hydrothermally synthesized. The structure of complex 1 was determined by single-crystal X-ray diffraction diffraction and further characterized by elemental analysis, IR spectrum, powder X-ray diffraction(XRD) and single-crystal X-ray diffraction. Complex 1 has 1D chains, which are further connected by π-π stacking interactions of neighbouring chains, generating a steady 3D supramolecular structure. Complex 2 shows the isolated mononuclear units, which are further extended to a 2D supramolecular layered structure through π-π stacking interactions and hydrogen bonds. Furthermore, complexes 1 and 2 exhibit green photoluminescent properties at room temperature.     

Hydrothermal Synthesis and Crystal Structure of a Three-dimensional Nickel(Ⅱ) Coordination Polymer: [Ni2(NIPH)2(bimb)2.5(H2O)] n·3nH2O

<正>A new metal-organic coordination polymer [Ni_2(NIPH)_2(bimb)_2.5(H_2O)]n·3nH_2O 1 (H_2NIPH = 5- nitroisophthalic acid, bimb = 1,4-bis(imidazol-1-yl)-butane) has been hydrothermally synthesized and structurally characterized by elemental analysis, IR, TG and single-crystal X-ray diffraction. The title complex crystallizes in the orthorhombic system, space group P4(1)2(1)2 with a = 17.3533(16), b = 17.3533(16), c = 30.802(6) , V = 9275(2) ~3, C_(41)H_(49)N_(12)Ni_2O_(16), M_r = 1083.34, D_c = 1.552 g/cm~3, μ(MoKα) = 0.897 mm~(-1), F(000) = 4504, Z = 8, the final R = 0.0383 and wR = 0.0952 for 7343 observed reflections (I > 2σ(I)). It exhibits a three-dimensional network structure.     

Synthesis,Crystal Structure,and Luminescence of a 1D Chain Cd(Ⅱ) Polymerwith 3,3?,5,5?-Benzene-1,3-biyl-tetrabenzoic Acid

A new Cd(Ⅱ) coordination polymer, [Cd(H_2btb)(bpy)]_n(1, H_4btb = 3,3?,5,5?-benzene-1,3-biyl-tetrabenzoic acid, bpy = 2,2?-bipyridine), has been synthesized and characterized by elemental analysis, IR spectroscopy, thermogravimetric(TG) analyses and single-crystal X-ray diffraction techniques. Complex 1 belongs to monoclinic system, C2/c space group. In 1, two carboxylate groups of the H_4btb ligand adopt bidentate chelating and μ_2-η~1:η~1 coordination modes, respectively, bridging the Cd(Ⅱ) atoms to generate a 1D polymeric ribbon. In addition, the photoluminescence property of complex 1 has also been studied.     

Two Three-fold Interpenetrating Co/Cd Architectures Based on Right-and Left-helical Chains

Two Cd(II) and Co(II)-based complexes formulated as [Cd(bimh)(L)]·2H_2O(1) and [Co(bimh)-(L)]·2H_2O(2)(bimh = 1,6-bis(imidazole-1-yl)hexane, H_2L = 4,4?-(methylenebis(oxy))dibenzoic acid) have been successfully prepared under hydrothermal conditions. Single-crystal X-ray diffraction analysis indicates that the two complexes are isostructural and crystallize in Pbca space group. The whole three-dimensional(3D) architecture is based on three-fold interpenetrated layers containing double helical chains. In addition, the IR, TG and photoluminescence properties were also investigated.     

Syntheses,Structures,Luminescence and Magnetic Properties of Three New Metal-organic Frameworks Based on Rigid Carbazole Ligand

Three new metal-organic frameworks [Cd(L)(obba)]·H)2O(1),[Co(L)(obba)]·MeCN(2) and [Cd_2(L)_2(ip)_2]·6H_2O·DMF(3)(H_2obba = 4,4?-oxybisbenzoic acid,H2 ip = m-phthalic acid) have been successfully synthesized based on the controllable self-assembly of 9-ethyl-3,6-diimidazolyl-carbazole(L),varied carboxylates and different metal ions under solvothermal conditions,which were characterized by single-crystal X-ray diffraction,elemental analysis,IR spectroscopy and thermogravimetry. Furthermore,luminescence and magnetic susceptibility of compound 2 are also investigated in detail. Single-crystal X-ray diffraction and topology analysis reveal that complexes 1~3 exhibit similar two-dimensional(2D) networks.     

Synthesis,Crystal Structure and Fluorescent Properties of Silver and Cadmium Complexes

Two new complexes [Ag(bix)]n·n NAA·n H_2O(1) and [Cd(NAA)(phen)_2(H_2O)]2· 2CH_3COO-·H_2O(2)(bix = 1,4-bis(imidazol-1-ylmethyl)benzene,HNAA = α-naphthylacetic acid,phen = 1,10-phenanthroline) have been successfully synthesized under hydrothermal conditions.Their structures have been determined by elemental analyses,IR spectroscopy,TG and single-crystal X-ray diffraction analysis.The intermolecular hydrogen bonding or π-π stacking interactions extend the complexes into a 3D supramolecular structure.Moreover,the luminescent properties of complex 2 have been investigated in the solid state.     

Synthesis and Crystal Structure of a New Cadmium（Ⅱ） Complex with 3,4-Pyridinedicarboxylic Acid and 1,4-Bis（imidazol-1-ylmethyl）-butane Ligands

A metal-organic coordination polymer [Cd(PDB)(bimb)]n (H2PDB=3,4-pyridine- dicarboxylic acid, bimb=1,4-bis(imidazol-1-ylmethyl)-butane) 1 has been hydrothermally synthesi- zed and characterized by elemental analysis, IR, TG, fluorescence spectrum and single-crystal X-ray diffraction. Yellow crystals crystallize in the monoclinic system, space group Cc with a=19.001(5), b=7.948(2), c=13.392(4) , β=120.803(3)o, V=1737.0(8)3, C17H17CdN5O4, Mr=467.76, Dc=1.789 g/cm3, F(000)=936, Z=4, μ(MoKα)=1.293 mm-1, the final R=0.0266 and wR=0.0534 for 2707 observed reflections (I > 2?(I)). The structure of 1 exhibits a three-dimensional network structure.     

Synthesis,Crystal Structure and Gas Adsorption of a Two-fold Interpenetrated Three-dimensional Framework {[Cd(2-NO_2-BDC)(4,4?-DPA)]·(DMF)}_n

The reaction of Cd(NO_3)_2·4H_2O with 4,4?-dipyridylacetylene(4,4?-DPA) and 2-nitroterephthalic acid(2-NO_2-H_2BDC) in DMF/H_2O mixed solvent has afforded a compound {[Cd(2-NO_2-BDC)(4,4?-DPA)]·(DMF)}_n(1). Compound 1 has been characterized by single-crystal X-ray diffraction, powder X-ray diffraction, thermogravimetry analysis, and IR spectrum. Compound 1 crystallizes in the monoclinic system, space group P21/n, with a = 12.1488(3), b = 14.6689(3), c = 13.1615(3) ?, β = 111.809(3)o, V = 2177.63(9) ?~3, Z = 4, C_(23)H_(18)N_4O_7 Cd, M_r = 574.81, D_c = 1.753 g/cm~3, μ = 8.523 mm~(-1), F(000) = 1152, the final R = 0.0411 and wR = 0.1064 for 3589 observed reflections with I 2s(I). In compound 1, the Cd(Ⅱ) ions are linked by the carboxylate groups of 2-NO_2-BDC ligands to give a two-dimensional layered structure based on the centrosymmetric dinuclear Cd_2(COO)_2 units, which are further connected by the 4,4?-DPA ligands to produce a three-dimensional framework with pcu topology. Careful examination revealed that compound 1 is a 2-fold interpenetrating framework. Furthermore, the gas adsorption properties of 1 for N_2 and CO_2 have also been investigated.     

Two Cadmium（Ⅱ） Coordination Polymers from Flexible Bis（imidazolyl） Ligands

The hydrothermal reaction of 1,4-bis(imidazol-1-yl)butane (bimb) and 1,4-bis(2- methylimidazol-1′-yl)butane (bmib) with CdBr2-4H2O gave rise to two coordination polymers, [Cd(bimb)2Br2]n (1) and [Cd(bmib)Br2]n (2), respectively. Single-crystal X-ray diffraction analysis reveals that 1 and 2 crystallize in the monoclinic space group P21/n and the orthorhombic space group Pccn, respectively. In 1, bimb adopts an anti-anti-anti conformation and bridges adjacent Cd(II) to form a two-dimensional (2D) network containing rhombohedral rings. The 2D layers are arranged in an offset ABCABC sequence to fill large void in the rhombohedral rings. In 2, bmib also exhibits an anti-anti-anti conformation, but it links neighboring Cd(II) into a one-dimensional (1D) chain. Br- in 1 and 2 serves as a monodentate ligand to balance charge.     

Synthesis,Structures, and Fluorescence Property of a Novel Heterometallic Complex Constructed by Imidazole

A novel heterometallic complex constructed by imidazole ligand, CoZn(C_3N_2H_3)_4(1), has been synthesized under hydrothermal conditions. Compound 1 was characterized by IR spectra, thermal analysis, powder X-ray diffraction and single-crystal X-ray diffraction. Single-crystal X-ray diffraction studies reveals that compound 1 is in the tetragonal system, space group I4_1cd with a = 23.4371(5), b = 23.4371(5), c = 12.4430(7) ?, V = 6834.9(4) ?~3, Z = 16, C_(12)H_(12)CoN_8Zn, M_r = 392.60, D_c = 1.526 g/cm~3, F(000) = 3152, μ = 2.381 mm~(–1), R = 0.0323 and w R = 0.0789. The CoZn(C_3N_2H_3)_4 is one-dimensional heterometallic molecular chains, which are further extended into a 3D open framework. Moreover, the solid-state fluorescence property of the complex has also been investigated at room temperature.     

Crystal Structures and Luminescent Properties of Three Coordination Polymers Based on 2,5-Furandicarboxylic Acid Ligand and 1,10-Phenanthroline

Three new coordination polymers,namely [Zn(FDA)(phen)(H_2O)·H_2O]_n(1),[Cd(HFDA)(phen)2(NO3)](2) and [Cd(FDA)(phen)]n(3)(H_2FDA = 2,5-furandicarboxylic acid,phen = 1,10-phenanthroline) have been synthesized by the solvothermal method and characterized by elemental analysis,IR,powder X-ray diffraction,thermogravimetric analysis and X-ray single-crystal diffraction analysis.For 1,the neighboring Zn~(2+) ions are bridged by FDA2-as linkers to form one-dimensional(1D) chains,and phen ligands are as the terminal ligands.Furthermore,the 1D chains are packed into a three-dimensional(3D) supramolecular structure through hydrogen bonds and π-π interactions.For 2,the H_2FDA ligand is partial deprotonation,which is a rare phenomenon among other coordination polymers based on H_2FDA.Under the synergetic effect of phen ligands and the partial deprotonation of H_2FDA,the structure of 2 is discrete.For 3,the Cd~(2+) ions are linked by two carboxylates of FDA2-ligand to give rise to 1 D zig-zag chains,and phen ligands chelate the Cd~(2+) ions like 1.In addition,solid-state luminescent spectra of three coordination polymers were also studied at room temperature.     

Synthesis, crystal structures and fluorescence properties of four mixed-ligands Zn(Ⅱ) and Cd(Ⅱ) coordination compounds

Four new coordination compounds, [Zn(dba)(bpy)]n (1), {[Zn(dba)(phen)]·2H2O}n (2), [Cd(dba)(bpy)(H2O)2] (3) and [Cd2(dba)2(phen)2]n (4) (H2dba = 2,5-dihydroxy-p-benzenediacetic acid, bpy = 2,2′-bipyridine, phen = 1,10-phenanthroline) have been prepared via solvothermal method and characterized by sin-gle-crystal X-ray diffraction, infrared spectroscopy, elemental analysis and powder X-ray diffraction. 1 and 2 possess 1D infinite chain structures. Complex 3 exhibits a mononuclear structure. Complex 4 owns bi...     

Syntheses,Crystal Structures and Magnetic Studies of Two Mn(Ⅱ) Complexes Based on 2-Pyrimidineamidoxime

Two novel manganese(Ⅱ) complexes, [Mn(pmadH_2)_2(3-Sb)]n(1) and {[Mn(pmadH2)(Hssal)(H_2O)]·2 H_2O}n(2)(pmadH_2= 2-pyrimidineamidoxime, 3-Sb = 3-sulfobenzoate dianion, H_3ssal = 5-sulfosalicylic acid), have been successfully obtained. The two complexes were characterized by single-crystal X-ray diffraction, powder X-ray diffraction, thermal gravimetric analysis, infrared spectra and elemental analysis. They are one-dimensional manganese polymer(1) and two-dimensional manganese complex(2), respectively. The values of χmT at 300 K of 1 and 2 are lower than the spin-only value for the non-interacting Mn(Ⅱ) ion(S = 5/2).     

Synthesis,Structure, and Luminescent Property of a 3-D Strontium Complex [Sr_3(pda)_2(Hpda)_2(H2O)_2]_n·2nH_2O

The title complex [Sr3(pda)2(Hpda)2(H2O)2]n·2nH2O(H2pda = pyridine-2,6-dicar- boxylic acid) has been prepared under solvothermal conditions. It has been characterized by X-ray single-crystal diffraction, IR and elemental analysis. The crystal belongs to the monoclinic system, space group P21/c with a = 10.3795(8), b = 9.2225(7), c = 18.5726(14) , β = 104.377(2)o, V = 1722.2(2) 3, C28H22N4O20Sr3, Mr = 997.36, Z = 2, Dc = 1.923 g/cm3, μ = 4.722 mm-1, F(000) = 984, the final R = 0.0269 and wR = 0.0538. This complex possesses a 3-D structure which is constructed from 1-D chain motifs linked by carboxylate groups. The luminescent property of the title complex has been investigated.     

Construction of Two Inorganic-organic Hybrid Vanadogermanates Based on Di-Cd-Substituted Ge-V-O Cluster and Transition-metal Complex Bridges

Two new inorganic-organic hybrid vanadogermanates H[Cd(en)(phen)(H_2O)]-[Cd(en)(phen)]{[Cd(phen)]_2[Ge_8V_(12)O_(41)(OH)_7]}·5H_2O(1)and[Cd(dien)_2][Cd(dien)]_2{[Cd(phen)]_2-Ge_8V_(12)O_(42)(H_2O)(OH)_6}·6.5H_2O(2)(en=ethylenediamine,dien=diethylenetriamine,phen=1,10-phenanthroline)have been synthesized by hydrothermal method.Their structures were measured by single-crystal X-ray diffractions,thermogravimetric analysis,powder X-ray diffractions and infrared spectra.Structural analysis reveals that compound 1 is an infrequent dimeric structure based on di-Cd-substituted Ge-V-O cluster and transition-metal complex bridges,while compound 2 is an infinite 1-D chain constructed from di-Cd-substituted Ge-V-O clusters and dinuclear bridging complexes.Magnetic measurement indicated that both 1 and 2 exhibit antiferromagnetic behaviors.     

Synthesis and Characterization of a Novel Coordination Complex Based on Fluorescein

A novel coordination complex,{[Cd)2(C_(20)H_(10)O_5)_2(H_2O)_4]·10H_2 O}_n,has been synthesized based on fluorescein(2-(6-hydroxy-3-oxo-3 H-xanthen-9-yl) benzoic acid) and systematically characterized by elemental analysis,infrared(IR) spectrum,thermo gravimetric analysis(TGA),powder X-ray diffraction(PXRD) and single-crystal X-ray diffraction.Compound 1 crystallizes in monoclinic,space group P2/n with a = 20.428(5),b = 8.084(2),c = 21.689(5) ?,β = 96.360(5)o,M_r = 993.46,V = 3559.7(15) ?~3,Z = 4,D_x = 1.845 g/cm~3,μ = 1.276 mm-1,F(000) = 1974,GOOF = 1.044,λ(Mo Kα) = 0.71073 ?,the final R = 0.0553 and wR = 0.1720 for 7245 observed reflections with I 2σ(I).     

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.     

Two Near-infrared Emissive Lanthanide-based Metal-organic Complexes Constructed from Efficient Energy Transfer Ligand

Utilizing two polycarboxylic acids as primary ligands and 1,10-phenanthrolion as an auxiliary ligand in the existence of lanthanide nitrates, two lanthanide-based complexes formulated as [Nd_4(2,6-pydc OH)_6(Phen)4(H_2O)2](H_2O)2(1) and [Yb_2(mBDC)_3(Phen)_2]n(2)(2,6-H_2 pydc OH = 4-hydroxypyridine-2,6-dicarboxylic acid, m-H_2BDC = isophthalic acid, Phen = 1,10-phenanthroline) have been solvothermally synthesized. They have been fully characterized by satisfactory elemental analysis, FT-IR spectra, TGA and single-crystal X-ray diffraction. Single-crystal X-ray diffraction study reveals that 1 has a zero-dimensional structure and 2 exhibits a rare cds topological net structure. Compounds 1 and 2 exhibit strong characteristic emissions of Nd(Ⅲ) and Yb(Ⅲ) ions in the near-infrared(NIR) region.