A New 3D Layered-pillared Cobalt（II）-organic Framework Constructed by Imidazole-4,5-dicarboxylic Acid （H_3IDC） and 4,4＇-Bipyridine （bipy）

A new 3D metal-organic framework of {[Co3(IDC)2(bipy)2(py)2]·7H2O}n (1) was obtained by the hydrothermal reaction of Co(NO3)2·6H2O, imidazole-4,5-dicarboxylic acid (H3IDC), 4,4'-bipyridine (bipy), and pyridine (py), and structurally characterized by elemental analysis, infrared spectroscopy, thermal gravimetric analysis, and single-crystal X-ray diffraction. X-ray diffraction crystal structural analysis reveals that it crystallizes in orthorhombic system, space group Pccn with a = 11.1040(3), b = 19.8834(5), c = 21.3025(5), V = 4703.3(2)3, Mr = 1079.63, Z = 4, Dc = 1.525 Mg·m-3, F(000) = 2212, μ(CuKα) = 8.855 mm-1, the final R = 0.0331 and wR = 0.0713 for 2525 observed reflections with I ≥ 2σ(I). In compound 1, each cobalt(II) ion is six-coordinated with a slightly distorted octahedral coordination geometry, and each μ3-IDC3- acts as a bridge to bond three neighboring Co(II) ions, leading to an infinite 2D network layer structure of [Co3(IDC)2]n with Kagomé lattice. The adjacent layers are further linked by μ2-bipy to form an infinite 3D layered-pillared framework architecture of [Co3(IDC)2(bipy)2(py)2]n.     

A New Two-dimensional Cd（Ⅱ） Coordination Polymer Constructed by Pyridine-2,5-dicarbohydrazide

A new two-dimensional Cd（Ⅱ） coordination polymer, [Cd（2,5-pdch）（H2O）]n·2n（ClO4）·nH2O （2,5-pdch = pyridine-2,5-dicarbohydrazide）, was prepared and characterized by elemental analysis, IR spectra and single-crystal X-ray diffraction analysis. The crystal belongs to monoclinic, space group P21/c with a = 10.905（2）, b = 11.602（1）, c = 15.034（2） A, β = 117.794 （10°, V = 1682.8（4A3, Z = 4, C7H13CdCl2NsO12, Mr = 542.52, Dc = 2.141 g/cm^3,/μ = 1.691 mm^-1, F（000） = 1072, 2（MoKa） = 0.71073A, the final R = 0.0608 and wR = 0.1329 for 2972 observed reflections with I 〉 2σ（I）. Single-crystal X-ray diffraction analysis reveals that the Cd（Ⅱ） atom displays a distorted pentagonal-bipyramidal geometry coordinated by three N atoms and three O atoms from three different 2,5-pdch ligands, and one water molecule. Interestingly, each two Cd（Ⅱ） atoms are bridged by two carbohydrazide groups of the 2,5-pdch ligands to form a dimeric unit, and such dimeric units are further connected by the 2,5-pdch ligand to generate a two-dimensional （4,4）-network.     

Construction of a 3D Co（II） Framework Based on Two Type of V-shaped Bidentate Ligands

A three-dimensional （3D） coordination polymer {[Co（bdc）（dpb）]·H2O}n （1） was prepared by solvothermal reaction of 1,3-dipyridyl benzene （dpb） with deprotonated 1,3-benzene- dicarboxylate （H2bdc）, and was characterized by elemental analysis, IR spectroscopy, and X-ray single-crystal diffraction. It crystallizes in the monoclinic system, space group C2/c with α = 15.478（6）, b = 12.865（5）, c = 24.091（10） ？, β = 95.599（5）°, V = 4774（3） ？3, C24H18CoN2O5, Mr = 473.34, Dc = 1.267 g/cm3, F（000） = 1864.0, μ = 0.748 mm-1 and Z = 8. Each Co（II） ion links three bdc2- anions to form an infinitely 1D ladder-shaped chain containing binuclear [（COO）Co]2 cluster, and dpb links adjacent 1D chains to form a 3D pcu framework. In addition, the UV-vis of 1 was also studied.     

Urothermal Synthesis,Crystal Structure,and Luminescent Property of a New Zn（II） Coordination Polymer Constructed from Terephalic Acid 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.     

Syntheses and Structures of Two New Cobalt Supramolecular Complexes, [Co（4,4＇-bipy）2（H2O）4]·[Co2（4,4＇-bipy）3（H2O）8]·2TST·2（4,4＇-bipy）·4H2O and [Co（4,4＇-bipy）2（H2O）4]DSNT·4,4＇-bipy

Two new cobalt（II） supramolecular complexes [Co（4,4＇-bipy）2（H2O）4]·[Co2（4,4＇-bipy）3（H2O）8]·2TST·2（4,4＇-bipy）·4H2O 1 and [Co（4,4＇-bipy）2（H2O）4]DSNT·4,4＇-bipy 2 based upon the assembly of Co（II）, 4,4＇-bipyridine （4,4＇-bipy） and two new multifunctional organic ligands, 2,4,6-tris（4-sulfophenyl- amino）-1,3,5-triazine （H3TST） and 2,4-bis（p-sulfanilato）-6-diethylamino-1,3,5-triazine （H2DSNT）, have been prepared by hydrothermal method and characterized by elemental analysis, IR spectrum, and single-crystal X-ray diffraction. The crystal structure of 1 is of monoclinic, space group P21/n with a = 13.599（4）, b = 18.988（6）, c = 22.995（7） A, β = 90.273（6）°, V = 5938（3）A^3, Z = 4, C56H59Co1.5N13O17S3, Mr = 1370.74, Dc = 1.533 g/cm^3, μ = 0.613 mm^-1, F（000） = 2842, GOOF = 1.018, the final R = 0.0796 and wR = 0.1498 for 9019 observed reflections with I 〉 2σ（I）. The crystal structure of 2 belongs to the monoclinic system, space group C2/c with a = 18.864（6）, b = 14.283（5）, c = 20.246（7）A, β = 107.799（6）°, V = 5194（3）A^3, Z = 4, C49H52CoN12O10S2, Mr = 1092.08, Dc = 1.397 g/cm^3, μ = 0.480 mm^-1, F（000） = 2276, GOOF = 1.059, the final R = 0.0665 and wR = 0.1900 for 4887 observed reflections with I 〉 2σ（I）. The results of X-ray crystal structure analysis revealed that complexes 1 and 2 exhibit layered supramolecular frameworks stabilized by electrostatic interactions, π-π interactions and hydrogen bonds.     

Hydrothermal Synthesis and Crystal Structure of a New Three-dimensional Co（II） Coordination Polymer Based on 2,3-Thiophenedicarboxylic Acid

A new Co（ll） polymer [Co（tdc）（l,4-bimb）]n 1 （H2tdc = thiophene-2,3-dicarboxy- lic acid, 1,4-bimb -- 1,4-bis（imidazol-1 ＇-yl）butane） was synthesized under hydrothermal conditions The compound crystallizes in the monoclinic system, space group C2/c with a = 15.643（9）, b = 8.839（5）, c=12.952（7） A, β = 105.964（6）°, V= 1721.8（16） A3, Z = 4, Mr = 419.32, Dc= 1.618 Mg/m3,μ = 1.149 mm-1, F（000） = 860, the final R = 0.0243 and wR =0.0613 for 1460 observed reflections with I 〉 2σ（I）. The compound presents a three-dimensional （3D） network extended by both tdc2- anions and 1,4-bimb ligands in which the tdc2- anions employ a chelating coordination mode. From the topology point of view, the structure could be described as a 3D 4-connected 65.8 CdSO4-type net. Infrared spectroscopy, elemental analyses, thermogravimetric analysis and powder X-ray diffraction properties of 1 are also investigated.     

Synthesis and Crystal Structure of a Cobalt（Ⅱ） Coordination Polymer with Benzene-1,3,5-triacetate and 1,2-Di（pyridin-4-yl）ethene

A novel coordination polymer, [Co3(bta)2(dpe)3(H2O)2]·2H2O (1, H3bta = benzene-1,3,5-triacetic acid, and dpe = 1,2-di(pyridin-4-yl)ethene), has been hydrothermally prepared and characterized by IR spectroscopy, elemental analysis and single-crystal X-ray diffraction. The crystal is of triclinic system, space group P , with a = 9.5687(15), b = 11.2470(17), c = 13.686(2) , α = 78.262(3), β = 89.271(4), γ = 81.292(3)°, V = 1425.2(4) 3, C60H56N6O16Co3, Mr = 1293.90, Dc = 1.508 g/cm3, F(000) = 667, μ = 0.940 mm-1 and Z = 1. The final R = 0.0707 and wR = 0.1413 for 4950 observed reflections (I > 2σ(I)). In the title complex, the bta ligand acts as a four-dentate bridging ligand to link up cobalt atoms into lamellar frameworks which are further interlinked by the dpe ligands to generate a trinodal (3,4,6)-connected (4.62)2(42.68.83.102)(64.82) net.     

A 3D Supramolecular Framework Based on 1D {[Co（proH）（H2O）3]2[P2Mo5O23]}n Chains and 1D Helical Water Chains

A three-dimensional supramolecular architecture, {[Co（proH）（H2O）3]2[P2Mo5O23]}·7H2O （1, pro = praline）, has been synthesized and characterized by IR, elemental analysis, thermogravimetric analysis, and single-crystal X-ray diffraction. 1 crystallizes in monoclinic, space group C2 with a = 20.600（3）, b = 11.6980（11）, c = 9.2944（10）A, β = 107.837（4）°, V = 2132.1（4） A^3, Z = 2, C10H46Co2Mo5N2O40P2, Mr = 1493.99, Dc = 2.327 g/cm^3, F（000） = 1468, μ（MoKα） = 2.375 mm^-1, the final R = 0.0339 and wR = 0.0844 for 4169 observed reflections with I 〉 2σ（I）. Singlecrystal X-ray crystallographic analysis reveals that the helical water chains and {[Co（proH）- （H2O）3]2[P2Mo5O23]}n chains are perpendicular to each other and extend into an overall three-dimensional supramolecular architecture by hydrogen-bonding interactions. The magnetic investigation indicates weak antiferromagnetic interactions in the compound.     

A Novel 3D Silver-triazolate Coordination Polymer with 6.102 Topology: Synthesis, Crystal Structure and Phosphorescence

A novel three-dimensional (3D) silver(I) coordination polymer, namely [Ag2(dmtrz)2]n (1) (Hdmtrz=3,5-dimethyl-1H,1,2,4-triazole), was synthesized through diffusion method. 1 was characterized by elemental analysis, FT-IR spectroscopy, thermogravimetric analysis (TGA) and single-crystal X-ray diffraction. 1 crystallizes in the orthorhombic system, space group Iba2 with a=12.5026(10), b=7.6026(6), c=18.8981(17), V=1796.3(3)3, Z=6, Mr=407.98, Dc=2.263 g·cm-3, μ=3.252 mm-1, F(000)=1176, the final R=0.0304 and wR=0.0634 for 1310 observed reflections (I > 2σ(I)). In the structure of 1, silver(I) centers are triconnected to dmtrz ligands, forming the (3,3)-connected 3D coordination polymer with a 6.102 topology. The luminescence property of 1 was also studied in solid state at room temperature.     

Synthesis,Crystal Structures and Magnetic Properties of Cobalt（II） and Manganese（II） Coordination Polymers Constructed from 5-（Pyridin-4-yl）isophthalate Ligands

Two coordination polymers, namely {[Co（L）（H2O）]·H2O}n （1） and [Mn（L）（phen）]n （2, H2L = 5-（pyridin-4-yl）isophthalic acid, phen = 1,10-phenanthroline）, have been hydrothermally synthesized and characterized by elemental analysis, IR, TG, magnetic properties, and single-crystal X-ray diffraction. 1 belongs to the triclinic system, space group Pī with α = 7.2188（7）, b = 10.0835（8）, c = 10.2069（7） ？, α = 113.713（7）, β = 99.490（7）, γ = 104.516（8）o, V = 628.24（9） ？3, C13H11NCoO6, Mr = 336.16, Z = 2, Dc = 1.777 Mg/m3, μ（MoKα） = 1.395 mm–1, F（000） = 342, S = 1.041, the final R = 0.0381 and wR = 0.0819 for 3744 observed reflections （I 〉 2σ（I）） and R = 0.0448 and wR = 0.0874 for all data. 2 belongs to the monoclinic system, space group P2/c with α = 12.9185（3）, b = 10.4343（2）, c = 31.7650（6） ？, β = 101.282（2）o, V = 4199.08（13） ？3, C50H30N6Mn2O8, Mr = 952.68, Z = 4, Dc = 1.507 Mg/m3, μ（MoKα） = 5.447 mm–1, F（000） = 1944, S = 1.128, the final R = 0.1003 and wR = 0.1052 for 8247 observed reflections （I 〉 2σ（I）） and R = 0.2595 and wR = 0.2625 for all data. Single-crystal X-ray diffraction studies show that compound 1 features a 2D sheet structure based on a dicobalt（II） subunit, which is further extended into a 3D metal-organic supramolecular framework by O–H… hydrogen bond. Compound 2 also possesses a 2D sheet, which is held together into a 3D supramolecular architecture via C–H… hydrogen bond and π-π stacking interactions. Magnetic studies for compound 2 show antiferromagnetic coupling between the adjacent metal centers, with J = –11.8 cm–1 and g = 2.12 for 2.     

Reversible single-crystal-to-single-crystal transformation and highly selective adsorption property of three-dimensional cobalt(II) frameworks

A three-dimensional (3D) coordination polymer, [Co(3)(L)(2)(BTEC)(H(2)O)(2)]·2H(2)O [1, HL = 3,5-di(imidazol-1-yl)benzoic acid, H(4)BTEC = 1,2,4,5-benzenetetracarboxylic acid], with tfz-d topology has been hydrothermally synthesized. The framework of 1 has high thermal stability and exhibits single-crystal-to-single-crystal (SCSC) transformations upon removing and rebinding the noncoordinated and coordinated water molecules. X-ray crystallographic analyses revealed that the coordination geometry of Co(II) changes from octahedral to square pyramid upon dehydration, accompanying the appearance of one-dimensional (1D) open channels with dimensions of 2.0 × 2.8 ?. The dehydrated form [Co(3)(L)(2)(BTEC)] (2) exhibits highly selective adsorption of water molecules over N(2), CH(3)OH, and CH(3)CH(2)OH, which could be used as sensors for water molecules. Furthermore, the magnetic properties of 1 and 2 were investigated, showing the existence of ferromagnetic interaction between the Co(II) atoms within the trinuclear subunit.     

Hydrothermal Synthesis and Crystal Structure of a Cobalt(Ⅱ) Coordination Polymer: [Co(C2O4)(bix)]n (bix=1,4-Bis(imidazol-1-ylmethyl)-benzene)

<正>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(C_2O_4)(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), β = 102.984(3)°, V = 1636.0(6)~3, C_(16)H_(14)CoN_4O_4, M_r = 383.23, D_c = 1.556 g/cm~3, μ(MoKα) = 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 {Co_2(C_2O_4)_2}_∞ chain is formed along the a axis. Furthermore, the 1D chains are held together via bix ligands to generate a two-dimensional network structure with 1D coronal-like channels (ca. 5.691 × 15.700).     

Hydrothermal Synthesis, Crystal Structure and Magnetic Properties of a Novel Cobalt Complex Based on Biphenyl-3,3'',4,4''-tetracarboxylate

A novel cobalt complex,[Co2(bptc)(bix)1.5](1,H4bptc=3,3',4,4'-biphenyltetra-carboxylic acid,bix = 1,4-bis(imidazol-1-ylmethyl)benzene),has been hydrothermally prepared and characterized by IR spectroscopy,elemental analysis and single-crystal X-ray diffraction.The crystal is of triclinic system,space group P1 with a=10.770(7),b=12.245(8),c=13.514(9),α=102.829(8),β=107.734(8),γ=98.833(9)°,C37H27N6O8Co2,Mr=801.51,V=1607.5(18)3,Dc=1.656g/cm3,F(000)=818,μ=1.100mm-1,Z=2,the final R = 0.0694 and wR = 0.1543 for...     

六核钴羰基簇的P(OC_2H_5)_3取代衍生物的合成、表征与结构

用P(OC_2H_5)_3与母体簇Co_6(μ_6-P)(μ-SCH_2CH_2CH_2S)(μ- PSCH_2CH_2CH_2S)(CO)_(12)进行取代反应得到一个二取代产物Co_6(μ_6-P)(μ- SCH_2CH_2CH_2S)(μ-PSCH_2CH_2CH_2S)(μ-CO)(CO)_9[P(OC_2H_5)_2]_2（I）, 同时还得到了两个一取代产物Co_6(μ_6-P)(μ-SCH_2CH_2CH_2S)(μ- PSCH_2CH_2CH_2S)(CO)_(11)[P(OC_2H_5)_3]（II a和II b,II b是II a的一个同 分异构体,其谱学数据与II a不同）。对合成的三个簇合物进行了元素分析、IR、 ~1H NMR、~(31)P NMR和MS谱学表征,对I做了X射线单晶衍射测定,其晶体属于单 斜晶系,P2_1/n空间群,晶胞参数：a = 1.1170(2) nm,b = 2.3554(5) nm,c = 1.7977(4) nm,β = 99.50(3)°,V = 4.6649(17) nm~3,Z = 4,D_c = 1.763 g/cm~3,F(000) = 2488,μ = 24.64 cm~(-1)。X射线晶体结构分析表明,取代 位置发生在簇合物顶端的两个钴原子上。晶体结构用直接法解出,经用全矩阵最小 二乘法对原子参数进行修正,最后的偏离因子为R_1 = 0.0497,wR_2 = 0.1386。     

水溶性双甲基化大豆苷元磺酸钴的合成及其晶体结构

以大豆苷元为先导化合物,合成了水溶性异黄酮衍生物--4′,7-二甲氧基异黄酮磺酸钴{[Co(H_2O)_6](C_(17)H_(13)O_4SO_3)_2·8H_2O(1)},其结构经~1H NMR,IR,元素分析和X-射线单晶衍射表征.1属单斜晶系,空间群P21/c,晶胞参数a=18.697(4)(A),b=7.358(2)(A),c=18.368(4)(A),β=116.223(1)°,Z=2.1的Co(Ⅱ)位于对称中心并被6分子水所配位;[Co(H_2O)_6]~(2+),[C_(17)H_(13)O_4SO_3]~- 和H_2O之间存在多种氢键,形成晶体结构中的亲水区.异黄酮骨架间反平行排列,存在着π┈π堆积作用,构成晶体结构中的疏水区.磺酸根是连接亲水区和疏水区的桥梁.氢键、π┈π堆积以及阴阳离子之间的静电引力作用共同将1组装成具有三维网络结构的超分子.     

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).     

Hydrothermal Synthesis and Crystal Structure of One 3D Coordination Polymer of Cobalt(II) Achieved from 1,1′-Biphenyl-2,2′,6,6′-tetracarboxylic Acid Ligand

<正>A new three-dimensional coordination polymer {[Co(BPTC)_(0.5)(bix)]·(H_2O)}_n (1, H4BPTC = 1,1′-biphenyl-2,2′,6,6′-tetracarboxylic acid, bix = 1,3-bis(imidazol-1-ylmethyl)-benzene) has been synthesized by the hydrothermal method and characterized by IR, elemental analysis, and single-crystal X-ray analysis. The crystal is of orthorhombic, space group Pbcn with a = 13.2975(10), b = 13.8424(12), c = 22.6367(17), CoC_(22)H_(19)N_4O_5, M_r = 478.34, V = 4166.7(6) ~3, D_c = 1.525 g/cm~3, F(000) = 1968, μ = 0.867 mm~(-1), S = 1.023 and Z = 8. The final R = 0.0683 and wR = 0.1529 for 3655 observed reflections with I > 2σ(I). In the title complex, the 2D Co-BPTC layer is formed through self-assembly of Co(II) ions and bridging BPTC~(4-) ligands in a molar ratio of 2:1. The metal-organic lattice layers are further united together through the second bridging ligand bix to form a 3D metal-organic framework. The thermal stability of the title complex was studied by thermal gravimetric (TG) and differential thermal analysis (DTA).     

A New 4-Connected Ni~Ⅱ Coordination Polymer with a Novel 3D 2-Fold Interpenetrated Framework

A coordination polymer [Ni(pbc)2(H2O)]n(Hpbc = 3-pyrid-4-ylbenzoic acid) has been prepared by hydrothermal synthesis and characterized by single-crystal X-ray diffraction,IR and elemental analysis.The crystal is of monoclinic,space group C2/c with a=19.624(5),b=12.029(5),c=19.452(5),β=104.45(5)°,C24H18NiN2O5,Mr=473.11,V=4447(2)3,Dc=1.413 g/cm3,F(000)=1952,μ = 0.91 cm-1,Z = 8,the final R=0.0424 and wR=0.0871 for 3757 reflections with I2σ(I).X-ray diffraction analysis reveals that the pbc-ligands act as diconnectors to link two Ni(Ⅱ) centers and adopt two coordination modes of μ2-N,O and μ2-N,O,O to form infinite wavy nickel-carboxylate chains along the bc plane.The topological analysis of compound [Ni(pbc)2(H2O)]n reveals that it is a typical CdS framework.     

Synthesis and Structure of a New Mixed-polyoxometalate （W/Mo） Compound： H5K{[Co（H2O）5]2（H2Mo3.24W8.76O42）}·19H2O

One new polyoxometalate compound connected via cobalt/potassium cations,namely H5K{[Co（H2O）5]2（H2Mo3.24W8.76O42）}·19H2O 1,was prepared and characterized by ele- mental analysis and IR spectroscopy. Single-crystal X-ray diffraction analysis result reveals that anions of {[Co（H2O）5]2（H2Mo3.24W8.76O42）}6- in compound 1 are linked by potassium cations to form one- dimensional chain,based on which a three-dimensional network is further constructed with the help of hydrogen bonds. Crystal data： H67Co2KMo3.24O72W8.76,Mr = 3297.87,monoclinic,C2/c,a = 19.0126（10）,b = 16.6025（5）,c = 19.1908（10）A,β = 106.713（1）°,V = 5801.8（5） A^3,Z = 4,Dc = 3.755 g/cm^3,F（000） = 5961,μ = 18.730 mm^-1,R = 0.0569 and wR = 0.1437 （I 〉 2σ（I））.     

Crystal Structure of a Two-dimensional Coordination Polymer [Ba2（phen）4（tp）2]n

A novel two-dimensional coordination polymer [Ba2(phen)4(tp)2]n(phen=1,10-phenanthroline,tp=terephthalic acid) has been synthesized with tp as bridge ligands and structurally determined by X-ray crystallography.The crystal belongs to the monoclinic system,space group C2/c,with a=18.877(4),b=18.489(4),c=15.658(3),β=103.61(3)o,V=5311.5(19)3,C32H20O4N4Ba,Mr=661.86,Z=8,F(000)=2624,μ=1.542mm-1,Dc=1.655 g/cm3,the final R= 0.0228 and wR=0.0554 for 6063 observed reflections(I2σ(I)).The structural analysis shows that each tp ligand bridges barium atoms to form a two-dimensional infinite layer.There are aromatic π-π stacking interactions between neighboring layers,and aromatic π-π interactions further extend such layers into a three-dimensional supramolecular framework.