Hydrothermal Synthesis, Crystal Structure and Thermal Analyses of Pyrazine-2,3-dicarboxylic Acid Bridged Co(II) Coordination Polymer of _∞~2[Co(phen)(μ-L)_(3/3)]·H_2O (H_2L = Pyrazine-2,3-dicarboxylic Acid)

A novel pyrazine-2,3-dicarboxylic acid bridged Co(II) phen complex 2 ∞ [Co- (phen)(μ-L)3/3]?H2O (H2L = pyrazine-2,3-dicarboxylic acid) has been hydrothermally synthesized, and X-ray single-crystal diffraction analysis shows that it crystallizes in the monoclinic system, space group P21/n with a = 11.480(2), b = 11.885(2), c = 12.939(3) ?, β = 110.55(3)°, V = 1653.1(6) ?3, Mr = 423.25, Dc = 0.425 g/cm3, Z = 4, R = 0.0361 and wR = 0.1011. The title complex consists of 2D 2 ∞ [Co(phen)(μ-L)3/3] layers and crystal water molecules. Each Co atom is octahedrally coordinated by three N atoms and three O atoms to form 2D 2 ∞ [Co(phen)(μ-L)3/3] polymeric layers. Furthermore, such 2D layers are stacked into 3D supramolecular frameworks via Van der Waals’ intermolecular forces, strong and weak hydrogen-bond interactions. The coordination phen and crystal water molecules are resided into cavities of the frameworks.

Hydrothermal Synthesis, Crystal Structure and Photoluminescent Property of a Zinc(II) Coordination Polymer Assembled by Phthalate and 4,4′-Bipyridine

A metal-organic coordination polymer {[Zn（Pht）（4,4＇-bipy）（H2O）2]·2H2O}n （Pht = phthalate, 4,4＇-bipy = 4,4＇-bipyridine） 1 has been hydrothermally synthesized and characterized by elemental analysis, IR, TG, fluorescence spectrum and single-crystal X-ray diffraction. Yellow crystals crystallize in the monoclinic system, space group P2/n, a = 7.6346（14）, b = 11.316（2）, c = 10.8133（19） ,A, β = 92.A.A,A.（3）°, V = 933.3（3） A^3, C18H20N2O8Zn, Mr = 457.73, Dc = 1.629 g/cm^3, F（000） = 472, Z = 2,μ（MoKa） = 1.367 mm^-1, the final R = 0.0323 and wR = 0.0821 for 1859 observed reflections （Ⅰ〉 2σ（Ⅰ））. The structure of 1 exhibits a two-dimensional bilayer framework formed by hydrogen bonding interactions. Furthermore, 1 shows yellow photoluminescent property at room temperature.

Hydrothermal Synthesis and Crystal Structure of a New Three-dimensional Heterometallic Coordination Polymer

A new 3d-4fheterometallic polymer {[Sm2Cu（PDC）2（SO4）2（H20）6]·2H2O}n 1 has been synthesized by Sm2O3, Cu（SO4）2·5H2O and pyridine-3,5-dicarboxylic acid under hydrothermal conditions. The compound crystallizes in triclinic system, space group Pi, with a = 6.352（7）, b = 10.040（10）, c = 10.315（11） A, α = 94.958（14）, β = 95.556（7）, γ = 99.747（14）°, V = 641.7（12）A3, Z = 1, M, = 1030.63, Dc= 2.651 Mg/m3,μ = 5.615 mm-1, F（000） = 491, the final R = 0.0491 and wR = 0.1345 for 2098 observed reflections with I 〉 2σ（I）. The compound is a three-dimensional network structure in which infinite lanthanide-carboxylate chains are linked by [Cu（$04）2]2- metalloligands to form a mixed-metal coordination network.

Hydrothermal Synthesis and Crystal Structure of a Cobalt(II) Coordination Polymer: [Co(C_2O_4)(bix)]_n (bix = 1,4-Bis(imidazol-1-ylmethyl)-benzene)

A new two-dimensional cobalt coordination polymer has been prepared and fully characterized by elemental analysis, IR, TG and single-crystal X-ray diffraction. The compound [Co（C2O4）（bix）]n 1 crystallizes in the monoclinic system, space group C2/c, with a = 11.549（3）, b = 15.700（3）, c = 9.260（2） A, β = 102.984（3）°, V = 1636.0（6） A^3, C16HIaCON4O4, Mr= 383.23, Dc = 1.556 g/cm^3, μ（MoKa） = 1.078 mm^-1, F（000） = 780, Z = 4, the final R = 0.0455 and wR = 0.1286 for 1483 observed reflections （I 〉 2σ（I））. Of the compound, the Co center is octahedrally coordinated with oxalate acting as a tetra-dentate ligand coordinated to the cobalt atom and each bix serving as a bridging ligand by employing two N-donors to coordinate with the Co center. An infinite {Co2（C2O4）2}∞ chain is formed along the α axis. Furthermore, the 1D chains are held together via bix ligands to generate a two-dimensional network structure with 1D coronal-like channels （ca. 5.691A × 15.700A）.

Hydrothermal Synthesis and Crystal Structure of a 1D Cu(II) Coordination Polymer: [Cu(bbpy)(H_2bptc)]_n Constructed by a Tetracarboxylic Acid

The title compound [Cu（bbpy）（H2bptc）]n （bbpy = 4,4＇-dimethyl-2,2＇-bipyridine and H4bptc = 1,1＇-biphenyl-2,2？,3,3＇-tetracarboxylic acid） has been synthesized by hydrothermal reaction, and its structure was determined by X-ray diffraction and characterized by elemental analysis, IR spectrum and thermogravimetric analysis. The crystal is of triclinic, space group P1 with a = 11.2831（12）, b = 11.6718（13）, c = 11.7771（13）, α = 105.392（2）, β = 108.382（2）, γ = 112.397（2）o, CuC28H20N2O8, Mr = 576.00, V = 1222.4（2）3, Dc = 1.565 g/cm3, F（000） = 590, μ = 0.951 mm-1, S = 1.022 and Z = 2. The final refinement gave R = 0.0405 and wR = 0.1142 for 4270 observed reflections with I 2σ（I）. The title complex has a 1D [Cu（bbpy）（H2bptc）]n chain structure, in which the extensive hydrogen-bond interactions make the chain more stable. The neighboring parallel chains are further packed into a 2D layer structure via π···π stacking interaction between the pyridine rings of bbpy ligands. Moreover, the adjacent layers are interconnected by the C–H···π interactions to form a 3D metal-organic framework.

Hydrothermal Synthesis and Crystal Structure of a New 2D Mn(II) Coordination Polymer with 4,4′-Sulfonyldi Benzoic Acid and 1,4-Bis(imidazol-1-ylmethyl) benzene Ligands

A novel manganese coordination polymer [Mn2（sfdb）2（biyb）2（H2O）2]n （1, H2sfdb = 4,4′-sulfonyldibenzoic acid, biyb = 1,4-bis（imidazol-1-ylmethyl）benze） has been hydrothermally synthesized and structurally characterized by single-crystal X-ray determination, IR and thermogravimetric analysis （TGA）. Complex 1 crystallizes in the triclinic system, space group Pi with a = 10.138（4）, b = 11.187（5）, c = 13.582（6） A, α = 69.146（7）, β = 89.628（7）, γ = 77.076（7）°, MnzC56H48N8O14S2, Mr= 1231.02, V= 1398.5（10） A3, Dc= 1.462 g/cm3, F（000） = 634,μ = 0.600 mm-1, S = 1.088 and Z = 1. The final refinement gave R = 0.0570 and wR = 0.1229 for 4889 observed reflections with 1 〉 2σ（I）. Interestingly, in complex 1, the sfdb2 and biyb ligands connect the Mn（Ⅱ） ions into two-dimensional 2-fold interpenetrating layers, and such layers are further connected with each other to generate a 3D supramolecular structure through hydrogen bonding interaction.

Hydrothermal Synthesis and Crystal Structure of a Three-dimensional Nickel(II) Coordination Polymer: [Ni_2(NIPH)_2(bimb)_(2.5)(H_2O)]n·3nH_2O

A new metal-organic coordination polymer [Ni2（NIPH）2（bimb）2.5（H2O）] n·3nH2O 1 （H2NIPH = 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）A, V= 9275（2）A^3, C41HagN12Ni2O16, Mr = 1083.34, Dc = 1.552 g/cm^3, p（MoKa） = 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.

Hydrothermal Synthesis and Crystal Structure of Manganese(Ⅱ) Coordination Polymer Assembled by 4-Sulfophthalate and 4,4′-Bipyridine

The rational design and synthesis of metal-directed supramolecular framework compounds have received much attention in coordination chemistry because of their potential applications in catalysis, molecular selection, nonlinear optics, ion exchange, and microelectronics. Many high-dimensional coordination complexes have been designed and prepared through molecular self-assembly processes. The open metal organic framework can be produced via two kinds of interactions, i. e. , coordinate covalent bonds and weaker intermolecular forces. For this reason, the most efficient means to synthesize these compounds is to establish possible connections among different units.

Hydrothermal Synthesis and Crystal Structure of a New 2D Zinc(Ⅱ) Coordination Polymer with 2-Aminoethanesulfonic Acid

A new 2D Zn（Ⅱ） coordination polymer [Zn（TAU）2]n （1, HTAU=2-aminoethane- sulfonic acid） constructed by 2-aminoethanesulfonic acid ligand has been hydrothermally synthesized by the reaction of Zn（CH3COO）2 and 2-aminoethanesulfonic acid with a 1：2 mole ratio and characterized by single-crystal X-ray diffraction, elemental analysis, infrared spectroscopy and thermogravimetric analysis. Crystal structural analysis reveals it crystallizes in monoclinic, space group P21/c with a=8.672（4）, b=6.523（3）, c=9.134（5） , β=115.441（5）°, V=466.6（4） 3, Mr=313.65, Z=2, Dc=2.232 Mg·m-3, F（000） =320, μ（MoKα）=3.091 mm-1, the final R=0.0358 and wR=0.0919 for 2026 observed reflections with Ⅰ 〉 2σ（Ⅰ）. In the structure, each zinc（Ⅱ） ion is coordinated in a slightly distorted octahedron, and each μ3-TAU– acts as a bridge to bond three neighboring Zn（Ⅱ） ions to form an infinite 2D network structure.

Hydrothermal Synthesis, Crystal Structure and Fluorescence Property of a Novel Coordination Polymer [Eu_2(C_6H_8O_4)_3(H_2O)_2]_n·n(4,4′-bpy)

A novel coordination polymer [Eu2(C6H8O4)3(H2O)2]n?n(4,4?-bpy) (Mr = 928.51) was synthesized by the hydrothermal reaction of EuCl3?6H2O, adipic acid and 4,4?-bpy, and determined by elemental analysis, IR spectroscopy, thermal gravimetric analysis, single-crystal diffraction and fluorescence property. X-ray analysis reveals that a three-dimensional network has been formed between Eu3+ by carboxyl of adipic acid. The crystal is of orthorhombic, space group Pbcn with a = 21.870(7), b = 7.652(2), c = 19.624(6) ?, V = 3284.1(17) ?3, Z = 4, Dc = 1.878 g/cm3, μ = 3.854 mm-1, F(000) = 1824, R = 0.0345 and wR = 0.0565. The coordination polymer exhibits intensive red light under UV excitation at room temperature, which is attributed to the 5D0→7F2 transition of Eu(Ⅲ) ions.

Hydrothermal Synthesis and Crystal Structure of a 2D Zinc(Ⅱ) Coordination Polymer with 5-Hydroxynicotinic Acid

The title compound, [Zn（5-hydroxynicotinate）22H2O]n, has been synthesized by reacting zinc sulfate vitriol with 5-hydroxynicotinic acid under hydrothermal conditions, and its structure was determined by X-ray crystallography with the following data： monoclinic, space group C2/c, C12H12N2O8Zn, Mr = 377.61, a = 10.223（3）, b = 10.319（3）, c = 13.613（4）A, β = 105.922（6）°, Z = 4, V = 1380.9（8） A3, F（000） = 768, Dc = 1.816 g/cm3, μ（MoKα ） = 1.826 mm^-1, the final R = 0.0401 and wR = 0.1380 for 1157 observed reflections （I 〉 2σ（I））. In the structure of the title compound, the ZnⅡ ion located in an inversion center lies in a distorted tetrahedral environment at a N2O2 coordination mode, and the 5-hydroxynicotinic acid ligand linkssymmetry-related ZnⅡ ions at aμ2-N,O bridging way forming a two-dimensional covalent structure. In the crystal, solvent water molecules form intermolecular O-H-O hydrogen bonds and pyridine rings of adjacent layers form n-n-stacking （3.346 A）, which connect adjacent two-dimensional sheets into a three-dimensional supramolecular network.

Hydrothermal Synthesis, Crystal Structure and Properties of a New Copper Coordination Polymer [Cu2I（C7H5N4）2]n with 3-（Pyridin-2-yl）-1,2,4-triazole) Ligand

A new copper coordination polymer[Cu2I(C7H5N4)2]n(1)with the 3-(pyridin-2-yl)-1,2,4-triazole(Hpt)and copper iodide was synthesized.It crystallizes in the triclinic space group P1 with a=8.6380(9),b=9.2434(9),c=11.8588(12)A,α=99.5890(10)o,β=109.0990(10)o,γ=105.2800(10)o,V=829.25(15)A^3,Dc=2.180 g/cm3,Z=2,F(000)=522,GOOF=1.046,the final R=0.0245 and wR=0.0598.The crystal structure shows that two copper ions are bridged by twoμ2-η1:η0-3-(pyridin-2-yl)-1,2,4-triazole anions and two iodide ions.The coordination environments of the Cu ion are Cu(1)N5 and Cu(2)N2I2,giving distorted square pyramidal geometry and trigon pyramid geometry.The magnetic and fluorescent properties of 1 were studied.

Hydrothermal Synthesis and Crystal Structure of a Manganese(II) Coordination Polymer with 1,1′-Biphenyl-2,2′,6,6′-tetracarboxyl Acid and 2,2′:6,2′′-Terpyridine Ligands

The title compound {[Mn（H2BPTC）（tpy）（H2O）]·（H2O）3}, （1, H4BPTC = 1,1＇- biphenyl-2,2＇,6,6＇-tetracarboxylic acid, tby = 2,2＇：6,2＇-terpyridine） has been synthesized by the hydrothermal reaction, and its structure was determined by X-ray diffraction and characterized by elemental analysis, IR spectrum and thermogravimetric analysis. The crystal is of monoclinic, space group P21/c with a = 10.971（2）, b = 20.776（4）, c = 14.332（3） A, β = 109.25（3）°, MnC31H27N3O12, Mr = 688.50, V= 3084.1（10） A^3, Dc = 1.483 g/cm^3, F（000） = 1420, p = 0.498 mm^-1, S = 1.066 and Z = 4. The final refinement gave R = 0.0447 and wR = 0.1103 for 5107 observed reflections with I 〉 2σ（I）. The title complex has a {[Mn（H2BPTC）（tpy）（H2O）]}, chain structure, and the hydrogen bonding interactions make it more stable. Each chain is further connected to the adjacent ones through π…π, C-H…π and rich hydrogen bonds to form a metal-organic coordination polymer.

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.

Hydrothermal Synthesis, Crystal Structure, Magnetic Properties and Network Topology of a Novel Binuclear Co(Ⅱ) Coordination Polymer_∞~1[Co_2(4,4'-bpy)_2(L)_4](bpy = Bipyridine, HL = 2-Fluorbenzoic Acid)

One novel binuclear Co（Ⅱ） coordination polymer ∞ [Co2（4,4＇-bpy）2（L）4] （1, bpy = bipyridine, HL = 2-fluorbenzoic acid） has been hydrothermally synthesized and structurally characterized by elemental analysis, IR and X-ray single-crystal diffraction. Complex 1 crystallizes in the monoclinic system, space group P21/c with a = 11.163（2）, b = 21.943（4）, c = 9.6381（19） A, β = 113.92（3）°, V= 2158.2（7） A3, Z= 4, Dc = 1.518 g/cm^3, Mr = 493.31, F（000） =1004, R = 0.0303 and wR = 0.0808 for 3614 observed reflections （I〉 2σ（I））. Complex I exhibits a 3D Schlafli symbol （4.62）（4.66.83） topological framework, and the magnetic characterization shows weak antiferromagnetic coupling exchange between two Co ions.

Ionothermal Synthesis, Crystal Structure and Photocatalytic Property of a New Cobalt Coordination Polymer

The reaction of flexible bis（imidazole） ligand and 1,2-bis（imidazol-l＇-yl）methane （bimm） with Co（Ⅱ） salt under ionothermal method resulted in the formation of a new coordination polymer {[Co（bimm）3]·（PF6）2}n （1）. X-ray single-crystal diffraction determination reveals that 1 crystallizes in the triclinic Pi space group, with α = 8.647（6）, b = 12.092（9）, c = 14.967（1 l） A, α = 88.912（8）, β = 81.199（8）, ）, = 89.395（8）°, V= 1546 （2） A3, Z = 2, Mr = 793.39, Dc= 1.704 Mg/m3,μ = 0.768 mm-1 F（000） = 798, the final R = 0.0626 and wR = 0.1634 for 4319 observed reflections with I〉 2σ（I）. In compound 1, the Co（lI） ion is connected to another Co（ll） by two bimm ligands to form 1D double chains which are further linked by bimm ligands to form a 2D wavelike layer. Topologically, the structure of 1 represents a uninodal 2D 4-connected sq1/Shubnikov tetragonal plane net. Moreover, thermogravimetric analyses and photocatalytic property for 1 have also been investigated.

Hydrothermal Synthesis and Crystal Structure of a Cd^(2+) Supramolecular Coordination Complex{[Cd_2(HCAM)_2(H_2O)_4]·3.5H_2O}_n with a 3D Metal-organic Open Framework

A three-dimensional coordination polymer {[Cd2（HCAM）2（H2O）4].3.SH2O}n was synthesized by the hydrothermal reaction of H3CAM （H3CAM = 4-hydroxypyridine-2,6-dicerboxylic acid） and Cd（NO3）2·4H2O. The structure was characterized by elemental analysis, thermal gravimetric analysis, infrared spectroscopy and single-crystal X-ray diffraction. It crystallizes in triclinic, space group P1 with a = 9.4389（19）, b = 11.009（2）, c = 11.192（2） A, α = 87.87（3）, β= 74.63（3）, γ = 81.22（3）°, V= 1108.2（4） A3, Z = 2, Dc= 2.164 g/cm3,μ = 2.011 mm^-1, F（000） = 710, R = 0.0419 and wR = 0.1170. X-ray analysis reveals that the title compound adopts a one-dimensional staircase structure by carboxyl of H3CAM and water molecules, and it is further linked by hydrogen bonds to form a 3-D metal-organic open framework. The thermal gravimetric analysis displays that the framework exists stably below 300 ℃.

Synthesis and Crystal Structure of a Novel Manganese Coordination Polymer Constructed by 3,5-Dimethylbenzoic Acid with 4,4'-Bipyridine

A novel manganese coordination polymer [Mn（L）2（bipy）]n （HL = 3,5-dimethylbenzoic acid, 4,4＇-bipy = 4,4＇-bipyridine） has been synthesized by a hydrothermal method. The molecular and crystal structures were determined by single-crystal X-ray diffraction. The crystal is of monoclinic, space group C2/c with a = 2.0996（8）, b = 1,1835（5）, c = 0.9958（4） nm, β = 110.161（5）°, V = 2,3229（16） nm^3, Z = 4, C28H26MnN2O4, Mr = 509.45, Dc= 1.457 g/cm^3,μ = 0.607 mm^-1, F（000） = 1060, Rim = 0.0566, R = 0.0334 and wR = 0.1078. In the crystal the manganese atom is six-coordinated by two nitrogen atoms from 4,4＇-bipy and four oxygen atoms from 3,5-dimethylbenzolate molecules, completing an octahedral geometry. The 4,4＇-bipy molecules bridge the infinite chain [Mn（L）2（bipy）]n to form a two-dimensional layer.

Hydrothermal Synthesis and Crystal Structure of a Zinc(Ⅱ)Coordination Polymer Assembled by Dpphen and H_2btec/btec

A new metal-organic coordination polymer [Zn2（dpphen）2（H2btec）（btec）0.5]n （dpphen = 4,7-diphenyl- 1,10-phenanthroline, H4btec = 1,2,4, xylic acid） 1 was obtained via hydrotherrnal synthesis and characterized by elemental analysis, TG; IR spectrum and single-crystal X-ray diffraction. The complex crystallizes in the monoclinic system, space group P2 1/n with a = 16.2996（14）, b = 14.3332（12）, c = 25.247（2） A, β = 103.4050（10）°, V= 5737.7（9） A）, C63H37N4O12Zn2, Mr = 1172.71, Dc = 1.358 g/cm3,μ（MoKα） = 0.902 mm^-1, F（000） = 2396, Z = 4, the final R = 0.0684 and wR = 0.1281 for 3728 observed reflections （1 〉 2σ（I））. It exhibits a two-dimensional network structure constructed by mixed ligands of dpphen and H2btec/btec.

Synthesis, Crystal Structure and Theoretical Calculations of a New Two-dimensional Co(Ⅱ) Coordination Polymer Based on Oxalic Acid and Bis(imidazol) Ligands

A new Co（ll） coordination polymer has been successfully synthesized under hydrothermal conditions [Co（C2O4）（mbix）]n （1, H2C2O4 = oxalic acid, mbix = 1,3-bis（imidazol- l-ylmethyl）benzene）. Its structure has been determined by elemental analyses, IR, UV spectroscopy and single-crystal X-ray diffraction analysis. Pink crystals crystallize in the triclinic system, space group PI with a = 8.8666（7）, b = 9.5859（8）, c = 10,8537（9） A,α = 67.6810（10）,β= 66.1260（10）, γ = 77.1300（10）°, V= 777.77（11）, CI6HI4CoN404, Mr = 385.24, Dc = 1.645 g/cm3, F（000） = 394, Z= 2,/z（MoKa） = 1.134 mm% the final R = 0.0482 and wR = 0.1231 for 2968 observed reflections （I〉 2σ（I））. It shows a two-dimensional （2D） network structure. The intermolecular C-H…O hydrogen bonding and π-π stacking interactions extend complex 1 into a 3D supramolecular architecture and play an important role in stabilizing 1. In addition, Natural Bond Orbital （NBO） analysis was performed by using the PBE0/LANL2DZ method built in Gaussian 09 Program. The calculation results showed obvious covalent interaction between the coordinated atoms and Co（II） ion.