Two new coordination polymers,[Ni(Hpdc)(bib)(H_(2)O)]_(n)(1)and{[Ni(bib)_(3)](ClO_(4))_(2)}_(n)(2),were prepared by mixing Ni^(2+),3,5⁃pyrazoledicarboxylic acid(H3pdc)/p⁃nitrobenzoic acid and 1,4⁃bis(imidazol⁃1⁃ylmeth...Two new coordination polymers,[Ni(Hpdc)(bib)(H_(2)O)]_(n)(1)and{[Ni(bib)_(3)](ClO_(4))_(2)}_(n)(2),were prepared by mixing Ni^(2+),3,5⁃pyrazoledicarboxylic acid(H3pdc)/p⁃nitrobenzoic acid and 1,4⁃bis(imidazol⁃1⁃ylmethyl)butane(bib)by a hydrothermal method,respectively.X⁃ray crystallography reveals a 2D network constructed by six⁃coordinated Ni(Ⅱ)centers,bib,and Hpdc2-ligands in complex 1,while a 2D network is built by Ni(Ⅱ)and bib ligands in 2.Furthermore,the quantum⁃chemical calculations have been performed on‘molecular fragments’extracted from the crystal structure of 1 using the PBE0/LANL2DZ method in Gaussian 16 and the VASP program.CCDC:2343794,1;2343798,2.展开更多
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 el...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）.展开更多
A new Cd（Ⅱ） coordination polymer, namely, [Cd（1,3-bip）（3,5-pdc）]n （1,3-bip = 1,3-bis（imidazol）propane and 3,5-pdc = pyridine-3,5-dicarboxylic acid） has been synthesized under hydrothermal conditions. Compou...A new Cd（Ⅱ） coordination polymer, namely, [Cd（1,3-bip）（3,5-pdc）]n （1,3-bip = 1,3-bis（imidazol）propane and 3,5-pdc = pyridine-3,5-dicarboxylic acid） has been synthesized under hydrothermal conditions. Compound 1 was characterized by infrared spectrum, elemental analysis, powder X-ray diffraction （PXRD） and single-crystal X-ray diffraction analysis. It crystallizes in monoclinic, space group P21/c with a = 1.40178（7）, b = 1.72502（12）, c = 1.41635（6） ran, β = 92.653（4）°, V = 3.4212（3） nm3, Z = 4, C16HIsCdNsO4, Mr = 453.73, Dc = 1.762 g/cm3, F（000） = 1808,μ = 1.310 mm1, R = 0.0899 and wR = 0.1945. In compound 1, each 3,5-pdc ligand links three Cd（lI） ions and each Cd（Ⅱ） attaches to bip ligands to form a complicated 2D double-layer structure. In addition, the thermal stability and luminescent property of 1 have been studied in the solid state at room temperature.展开更多
A new 2D Zn（Ⅱ） coordination polymer [Zn（HIDC）（bix）0.5]n（1） was obtained by the hydrothermal reaction of ZnCl2,imidazole-4,5-dicarboxylic acid（H3IDC） and 1,4-bis（imidazol-1-ylmethyl）-benzene（bix） with a ...A new 2D Zn（Ⅱ） coordination polymer [Zn（HIDC）（bix）0.5]n（1） was obtained by the hydrothermal reaction of ZnCl2,imidazole-4,5-dicarboxylic acid（H3IDC） and 1,4-bis（imidazol-1-ylmethyl）-benzene（bix） with a 2：2：1 mole ratio.X-ray diffraction crystal structural analysis reveals it crystallizes in monoclinic,space group P21/n with a = 12.125（3）,b = 10.541（3）,c = 12.484（3） ,β = 115.834（4）°,V = 1436.0（6） 3,Mr = 338.60,Z = 4,Dc = 1.566 Mg·m-3,F（000） = 684,μ（MoKα） = 1.730 mm-1,the final R = 0.0439 and wR = 0.0888 for 2101 observed reflections with I ≥ 2σ（I）.In 1,each zinc（Ⅱ） ion is five-coordinated with a slightly distorted trigonal bipy-ramidal coordination geometry,and each μ2-HIDC2-acts as a bridge to bond two neighboring Zn（Ⅱ） ions,leading to a 1D zigzag chain architecture.The adjacent zigzag chains are further linked by μ2-bix to form an infinite 2D network structure.The fluorescence spectrum of 1 exhibits intense emission at 466 nm when excited at 397 nm in solid state at room temperature.展开更多
A new copper(Ⅱ)coordination polymer[Cu5(Hpt)5(H2O)2(2,3-PCA)2]n·12nH2O(1)has been successfully synthesized under hydrothermal conditions with copper hydroxide,3-(pyridin-2-yl)-1,2,4-triazole(Hpt)and 2,3-pyridine...A new copper(Ⅱ)coordination polymer[Cu5(Hpt)5(H2O)2(2,3-PCA)2]n·12nH2O(1)has been successfully synthesized under hydrothermal conditions with copper hydroxide,3-(pyridin-2-yl)-1,2,4-triazole(Hpt)and 2,3-pyridinedi-carboxylic acid(2,3-PCA).The structure of the title compound was determined by X-ray diffraction analyses,elemental analyses and IR spectrum.The architecture of 1 consists of one-dimensional sandwich-like chains which are connected by extensive hydrogen bonding interactions.The solid-state photoluminescence displays an obvious emission band at 384 nm upon excitation at 340 nm.In addition,electrochemistry property has also been studied.展开更多
One new coordination polymer, [Mn(Hbtc)(bpy)(HO)]1, was synthesized by the reaction of manganese(Ⅱ) salt under pH-controlled hydrothermal conditions with unsymmetrical polycarboxylic acid of 1,2,4-benzenetricarboxyli...One new coordination polymer, [Mn(Hbtc)(bpy)(HO)]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(Hbtc) 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.展开更多
One-dimensional chain copper（Ⅱ） coordination polymer has been synthesized and characterized in the solvent mixture of water and alcohol with o-acetamidobenzoic acid,4,4＇-bipyridine and copper perchlorate.It is of ...One-dimensional chain copper（Ⅱ） coordination polymer has been synthesized and characterized in the solvent mixture of water and alcohol with o-acetamidobenzoic acid,4,4＇-bipyridine and copper perchlorate.It is of tetragonal,space group P41212 with a=1.57756（10）,b= 1.57756（10）,c=2.1438（3）nm,V=5.3352（8） nm^3,Dc=1.524 g/cm^3,Z=4,F（000）=2536,R= 0.0479 and wR=0.0979.The crystal structure shows two coordination modes.The copper（1） is coordinated with two nitrogen atoms of one 4,4＇-bipyridine molecule and two oxygen atoms from two o-acetamidobenzoic acid molecules,forming a distorted tetrahedral coordination geometry; the copper（2） is coordinated with two nitrogen atoms of one 4,4＇-bipyridine molecule,four oxygen atoms from two o-acetamidobenzoic acid molecules and two water molecules,generating a distorted octahedral coordination geometry.The result of TG analysis shows that the title complex is stable below 180.0 ℃.展开更多
A new polymeric znic（II） coordination polymer, [Zn2（bptc）·（H2O）4]n·nC H3 OH 1, was synthesized by the hydrothermal reaction of Zn（NO3）2·6H2O with 1,1＇-biphenyl-2,2＇,6,6＇-tetracarboxylic acid...A new polymeric znic（II） coordination polymer, [Zn2（bptc）·（H2O）4]n·nC H3 OH 1, was synthesized by the hydrothermal reaction of Zn（NO3）2·6H2O with 1,1＇-biphenyl-2,2＇,6,6＇-tetracarboxylic acid（H4bptc） and structurally characterized by single-crystal diffraction, IR and elemental analysis. The polymer crystallizes in the orthorhombic system, space group Pnna with a = 13.411（1）, b = 16.418（2）, c = 9.178（7）, V = 2025.2（3） 3, Z = 4, C17H14O13Zn2, Mr = 557.06, Dc = 1.827 g/cm3, F（000） = 1120, μ（MoK α） = 2.439 mm-1. The final R and wR are 0.0548 and 0.1691 for 1279 observed reflections with I 2（I）. In this compound, the bptc4- anion adopts monodentate bridging coordination modes connecting the zinc（II） ions to form a 1D chain structure, which furnishes a 2D supramolecular architecture through hydrogen bonding interactions formed by carboxylic oxygen atoms of bpdc, oxygen atoms of crystalline methanol and water molecules. Complex 1 displays an emissive maximum at 435 nm in the solid state at room temperature.展开更多
Reactions of CdX2（X=NO3-, ClO4-） with Hatza （atza=5-aminotetrazole-1-acetato anion） and 2,2′-bipyridine （2,2′-bipy） or 1,10-phenanthroline （1,10-phen） in a methanol/aqueous solution produced a set of new Cd...Reactions of CdX2（X=NO3-, ClO4-） with Hatza （atza=5-aminotetrazole-1-acetato anion） and 2,2′-bipyridine （2,2′-bipy） or 1,10-phenanthroline （1,10-phen） in a methanol/aqueous solution produced a set of new Cd（Ⅱ） coordination polymers, {[Cd（atza）（H2O）（2,2′-bipy）]ClO4}n （1）, {[Cd（atza）（H2O）（1,10-phen）]ClO4 }n （2）, {[Cd（atza）（H2O）（2,2′-bipy）]NO3}n （3） and {[Cd（atza）2 （1,10-phen）]·0.5H2O}n （4）. Single-crystal X-ray diffraction analysis reveals that each Cd（Ⅱ） ion has a distorted octahedral coordination geometry in 1-4, and the Cd（Ⅱ） ion centers are connected through the tridentate atza bridging ligands to form a 2D layer （1-3） or ID chain （4） structure. The fluorescent properties of 2 and 4 are also discussed.展开更多
A two-dimensional（2D） 44 topological ZnⅡ coordination polymer {[Zn2Cl2（L）（4bpy）2]}∞（H2L = anthracene-9,10-dicarboxylic acid, 4bpy = 4,4ˊ-bipyridine） based on binuclear [Zn2Cl2] nodes has been synthesized an...A two-dimensional（2D） 44 topological ZnⅡ coordination polymer {[Zn2Cl2（L）（4bpy）2]}∞（H2L = anthracene-9,10-dicarboxylic acid, 4bpy = 4,4ˊ-bipyridine） based on binuclear [Zn2Cl2] nodes has been synthesized and characterized by IR, elemental analysis, X-ray powder diffraction and single-crystal X-ray diffraction analysis. Moreover, the luminescent properties of the correspon- ding compound have been briefly investigated.展开更多
A new coordination polymer [Ni（3-bpo）（m-bdc）（C2H5OH） 2]n（1,3-bpo = 2,5-bis（3-pyridyl） -1,3,4-oxadiazole,m-H2bdc = 1,3-benzenedicarboxylic acid） was solvothermally synthesi-zed and characterized by IR,TGA and...A new coordination polymer [Ni（3-bpo）（m-bdc）（C2H5OH） 2]n（1,3-bpo = 2,5-bis（3-pyridyl） -1,3,4-oxadiazole,m-H2bdc = 1,3-benzenedicarboxylic acid） was solvothermally synthesi-zed and characterized by IR,TGA and single-crystal X-ray diffraction. The title complex crystalli-zes in the orthorhombic system,space group Pnma with a = 7.786（3） ,b = 17.253（6） ,c = 18.478（6） ,V = 2481.9（14） A^3,Mr = 539.18,Dc = 1.443 g/cm^3,Z = 4,R = 0.0353 and wR = 0.0589. The m-bdc and 3-bpo bridge two Ni（Ⅱ） ions through two carboxylate groups and two pyridyl groups forming a 1D infinite double-sinusoidal chain along the c axis. The photoluminescence of 1 shows a large red shift compared to that of free ligands in the solid state.展开更多
A novel manganese（Ⅱ） coordination polymer with 2-（4-carboxyphenoxy） benzoic acid （2,4＇-H2oba） and 1,10-phenanthroline （1,10-phen） has been prepared by hydrothermal synthesis and characterized by single-cryst...A novel manganese（Ⅱ） coordination polymer with 2-（4-carboxyphenoxy） benzoic acid （2,4＇-H2oba） and 1,10-phenanthroline （1,10-phen） has been prepared by hydrothermal synthesis and characterized by single-crystal X-ray diffraction, IR and elemental analysis. Compound [Mn（2,4＇-oba）（1,10-phen）] is of monoclinic system, space group P21/n with a = 7.960（1）, b = 15.464（2）, c = 18.703（3）A, β = 99.976（2）°, V = 2267.5（6） A^3, Z = 4, Mr = 491.35, Dc = 1.439 g/cm^3, F（000） = 1004 and μ = 0.623 cm·1. The final R = 0.0419 and wR = 0.0978 for 3444 observed reflections with I 〉 2σ（I）. X-ray diffraction analysis reveals that the oba2-ligands adopt a bis（chelating bidentate） mode to link two Mn（Ⅱ） centers to form an infinite 1D helical chain. Furthermore, a 3D supramolecular structure was formed by π-π stacking interactions and hydrogen bonds.展开更多
A new 3D copper（Ⅱ） coordination polymer, {[Cu_2（tbip）_2（1,3,5-tib）]×2H_2O}n（1, H_2 tbip = 5-tert-butyl isophthalic acid, 1,3,5-tib = 1,3,5-tris（1-imidazolyl）benzene）, has been synthesized by hydrotherm...A new 3D copper（Ⅱ） coordination polymer, {[Cu_2（tbip）_2（1,3,5-tib）]×2H_2O}n（1, H_2 tbip = 5-tert-butyl isophthalic acid, 1,3,5-tib = 1,3,5-tris（1-imidazolyl）benzene）, has been synthesized by hydrothermal reaction of Cu（OAc）_2·4H_2O, H_2 tbip and 1,3,5-tib. It has been structurally characterized by element analysis, IR and magnetic measurement. X-ray single-crystal analysis was carried out for 1, which crystallizes in the triclinic system, space group P1 with a = 7.822（3）, b = 15.854（6）, c = 17.553（6） ？, a = 113.033（4）, β = 90.694（4）, g = 101.006（4）°, V = 1957.3（12） ？~3, Z = 1, D_c = 1.493 g/cm^3, M_r = 1759.70, F（000） = 908, R = 0.0721 and w R = 0.1978 with I 〉 2s（I）. The single-crystal X-ray diffraction studies reveal that compound 1 exhibits 2D [Cu（tbip）] layers which are further pillared by 1,3,5-tib ancillary ligand with terminal tridentate coordination mode to generate the final 3D structure. Magnetic susceptibility data for 1 have been measured in the range of 2~300 K. There are antiferromagnetic interactions between copper ions of the compound.展开更多
A polymer, [NiL（bipy）·2H2O]n（1, bipy = 4,4ˊ-bipyridine）, has been acquired by the reaction of Ni（OAc）2·4H2O with N,Nˊ-bis（2-hydroxyl-5-fluorobenzyl）-2-hydrxylpropane dii- mine in the presence of 4,...A polymer, [NiL（bipy）·2H2O]n（1, bipy = 4,4ˊ-bipyridine）, has been acquired by the reaction of Ni（OAc）2·4H2O with N,Nˊ-bis（2-hydroxyl-5-fluorobenzyl）-2-hydrxylpropane dii- mine in the presence of 4,4ˊ-bipyridine. X-ray crystallographic analysis shows that it is comprised of a mononuclear Ni（Ⅱ） complex [NiL] linked by 4,4ˊ-bipyridine. Its crystal crystallizes in the orthorhombic system, space group C2/c with a = 22.595（3）, b = 18.395（2）, c = 15.434（2） , V = 6155（1）3, Dc = 1.259 g/cm-3, Z = 8, Mr = 583.23, F（000） = 2416.0, μ（MoKa） = 0.681 mm-1, S = 1.049, R = 0.0512 and wR = 0.1108 for 6032 observed reflections（I 〉 2σ（I））. There are water hexamers in the complex. A weak overall ferromagnetic behavior has been evaluated by Curie-Weiss rule and by the formula of alternating ferro-ferromagnetic coupling in one-dimensional Ni（Ⅱ） chain, which gives g = 2.005（1） and J1 = 0.31（3） cm-1.展开更多
Two coordination polymers, namely {[Mn（HL_1）（phen）]·4H_2O}_n（1） and [Co_2（HL_2）_2（H_2O）_2]_n（2） have been constructed hydrothermally using H_3L_1 and H_3L_2（H_3L_1 = 2-（5-carboxypyridin-2-yl）tereph...Two coordination polymers, namely {[Mn（HL_1）（phen）]·4H_2O}_n（1） and [Co_2（HL_2）_2（H_2O）_2]_n（2） have been constructed hydrothermally using H_3L_1 and H_3L_2（H_3L_1 = 2-（5-carboxypyridin-2-yl）terephthalic acid, H_3L_2 = 2-（4-carboxypyridin-3-yl）terephthalic acid）, phen, MnCl_2×4H_2O and CoCl_2×6H_2O. The products were isolated as stable crystalline solids and were characterized by IR spectroscopy, elemental, thermogravimetric（TGA）, powder（PXRD） and single-crystal X-ray diffraction analyses. Compound 1 features a 3D framework structure, which was topologically classified as a trinodal 4,6,6-connected net with the unique topology defined by the point symbol of（3^（10）.5.6~4）4（3^（10）.6.7~4）2（5.6~2.8~2.9）. Compound 2 possesses a 2D metal-organic layer, which was topologically classified as a binodal 4,4-connected layer defined by the point symbol of（4~3.6~2.8）. The layers are further extended into a 3D supramolecular framework via hydrogen bonds. The magnetic properties for both compounds were also investigated, indicating antiferromagnetic interactions between the adjacent metal ions.展开更多
The new manganese（Ⅱ） coordination compound, [Mn（Cl）2（L）2]（1, L = 11-fluorodipyrido[3,2-a:2?,3?-c]phenazine）, has been achieved under hydrothermal conditions. The structure of compound 1 was determined by sing...The new manganese（Ⅱ） coordination compound, [Mn（Cl）2（L）2]（1, L = 11-fluorodipyrido[3,2-a:2?,3?-c]phenazine）, has been achieved under hydrothermal conditions. The structure of compound 1 was determined by single-crystal X-ray diffraction. 1 crystallizes in monoclinic system, space group C2/c with a = 8.419（2）, b = 12.286（2）, c = 28.451（6） ?, β = 95.889（3）°, V =2927.5（10） ?3, Z = 4, C36 H16 MnF2 Cl2 N8, Mr = 724.41, Dc = 1.644 g/cm3, F（000） = 1460, μ（Mo Ka）= 0.691 mm-1, R = 0.0445 and wR = 0.0982. Adjacent compounds are stacked by one type of π-πinteraction among L ligands to generate a 1D supramolecular chain. Further, the 1D supramolecular chains are stacked by another type of π-π interaction among L ligands to give a 2D supramolecular layer. Moreover, the C-F···π interactions between the carbon atom of the L ligand and the pyrazine ring of the adjacent L ligand further stabilize the supramolecular layer of 1. In addition, natural bond orbital（NBO） analysis has been calculated by the B3LYP/LANL2DZ method, which shows obvious covalent interaction between the coordinated atoms and Mn（Ⅱ） ion.展开更多
A new complex [Cu（L）（1,10-phen）]n （1, L = N-3-pyridine sulfonyl amino acid） has been synthesized and characterized by IR, elemental analysis and X-ray diffraction analysis, and its crystal belongs to monoclinic,...A new complex [Cu（L）（1,10-phen）]n （1, L = N-3-pyridine sulfonyl amino acid） has been synthesized and characterized by IR, elemental analysis and X-ray diffraction analysis, and its crystal belongs to monoclinic, space group P2Jc with a = 11.481 （2）, b = 1 8.094（4）, c = 8.5198（17） ]°, β= 102.26（3）°, V = 1729.5（6） ,/k3, Z = 4, Dc = 1.759 g/cm3, F（000） = 932, p = 1.422 mm-1, R = 0.0368 and wR = 0.0893. In 1, the Cu（ll） ion adopts a slightly distorted five-coordinated square pyramidal geometry. The L2- ligand adopts O of the carboxyl bridging adjacent Cu（Ⅱ）units to form an infinite chain structure along the c axis. Also, π-π stacking interactions between the adjacent chains expanded the 1-D structures into a 3-D supramolecular structure.展开更多
The title Mn（Ⅱ） coordination polymer,poly{[heptaaqua-（μ4-bi-phenyl-3,3？,5,5？-tetracarboxylate）-bimanganese（Ⅱ）] pentahydrate},[Mn_2（bpta）（H_2O）_7]_n·5n H_2O（I）,is crystallized from a mixture of bi...The title Mn（Ⅱ） coordination polymer,poly{[heptaaqua-（μ4-bi-phenyl-3,3？,5,5？-tetracarboxylate）-bimanganese（Ⅱ）] pentahydrate},[Mn_2（bpta）（H_2O）_7]_n·5n H_2O（I）,is crystallized from a mixture of biphenyl-3,3？,5,5？-tetracarboxylic acid（H_4bpta） and MnCl_2·4H_2O in waterethanol under room temperature. Its asymmetric unit consists of one and two halves of crystallographically independent Mn（Ⅱ） cations,one fully deprotonated H4 bpta ligand,seven coordinated water molecules and five solvent water as guest molecules. In I,each Mn（Ⅱ） atom is octahedrally coordinated by six oxygen atoms from bpta^（4-） anions and coordinated water molecules. In the Mn（Ⅱ） cations,one half Mn（Ⅱ） ion of them located at a 2-fold axis generating a trinuclear [Mn_3（H_2O）_2（RCOO）_2] linker by μ1,1-O（water） and μ1,3-O,O？（carboxylate） bridges and another half Mn（Ⅱ） ion with an inversion is a mononuclear linker. These neighbouring trinuclear and mononuclear Mn（Ⅱ） cations are linked together by biphenyl-3,3？,5,5？-tetracarboxylates to form a three-dimensional framework with a（42.84） topology of a（4,4）-connected net,in which the positions of the trinuclear [Mn_3（H_2O）_2（R-COO）_2] linker as a 4-connector linking four bpta^（4-） ligands in I reproduce an eagle-shaped arrangement. The polymeric structure exhibits a water channel with an accessible void of 797.1 ？~3,amounting to 15.7% of the total unit-cell volume. Each of the cavities in the network is occupied by solvent water molecules.展开更多
A new coordination polymer {[Cd（C_（21）H_（14）N_6）（C_8H_4O_4）]·H_2O}_n（1） was synthesized by an elaborate design via the reaction of 3-（2,6-di（pyrazin-2-yl）pyridin-4-yl）-1H-indole（bppi）,1,4-benzene-...A new coordination polymer {[Cd（C_（21）H_（14）N_6）（C_8H_4O_4）]·H_2O}_n（1） was synthesized by an elaborate design via the reaction of 3-（2,6-di（pyrazin-2-yl）pyridin-4-yl）-1H-indole（bppi）,1,4-benzene-dicarboxylic acid（H2bdc） and cadmium（Ⅱ） nitrate in CH_3OH/H_2O mixed solvents. Complex 1 crystallizes in orthorhombic,space group Ccca with a = 20.012（4）,b = 31.881（6）,c = 19.808（4） ？,V = 12638（4） ？~3,Z = 16,C_（29）H_（20）CdN_6O_5,M_r = 644.91,D_c = 1.356 g·cm^（-3）,μ = 0.735 mm^（-1）,F（000） = 5184,GOOF = 1.046,the final R = 0.0405 and wR = 0.1063 for 6870 observed reflections（I 〉 2σ（I））. The Cd（Ⅱ） centre is hepta-coordinated by three N and four O atoms from one bppi terminal ligand and two bdc2– ligands,respectively,displaying a capped trigonal prism geometry. Structure extension gives coordination polymeric chains,in which the bdc2– linkers connect Cd（Ⅱ） cations into a one-dimensional（1D） coordination polymer along the c axis,giving zigzag chains with the Cd···Cd separation of 11.178（1） ？. The adjacent bppi terminal ligands in the chains are anti-periplanar conformation. The three-dimensional（3D） structure is stabilized by π···π stacking and hydrogen-bonding interactions to form a supramolecular self-penetrating network with 1D channels. In 1,there are voids 2999.7 ？~3 with 23.7% of per unit cell volume. Thermal analysis indicates that the framework of 1 is stable until 651 K and the photoluminescence of 1 in the solid shows very weak fluorescence at 382 and 560 nm upon excitation at 310 nm.展开更多
One new coordination polymer, [Ni（m-bix）（m-BDC）]（1, m-bix = 1,3-bis（imidazol-1-ylmethyl）benzene, m-BDC = 1,3-benzenedicarboxylic acids）, has been hydrothermally synthesized and structurally characterized by el...One new coordination polymer, [Ni（m-bix）（m-BDC）]（1, m-bix = 1,3-bis（imidazol-1-ylmethyl）benzene, m-BDC = 1,3-benzenedicarboxylic acids）, has been hydrothermally synthesized and structurally characterized by elemental analysis, IR, TGA and X-ray single-crystal diffraction. The green block crystal of complex 1（C22H18N4Ni O4） belongs to monoclinic system, space group P21/c with a = 10.0418（3）, b = 23.8651（6）, c = 8.7872（2） A, β = 112.333（3）°, V = 1947.88（9）A3, Z = 4, Dc = 1.572 g/cm^3, Mr = 461.11, F（000） = 952, R = 0.0335 and w R = 0.0683 for 2827 observed reflections（I 〉 2σ（I））. Complex 1 exhibits a novel 6-connected 3D sxd type topological framework. The magnetic characterization of complex 1 shows antiferromagnetic coupling exchange.展开更多
文摘Two new coordination polymers,[Ni(Hpdc)(bib)(H_(2)O)]_(n)(1)and{[Ni(bib)_(3)](ClO_(4))_(2)}_(n)(2),were prepared by mixing Ni^(2+),3,5⁃pyrazoledicarboxylic acid(H3pdc)/p⁃nitrobenzoic acid and 1,4⁃bis(imidazol⁃1⁃ylmethyl)butane(bib)by a hydrothermal method,respectively.X⁃ray crystallography reveals a 2D network constructed by six⁃coordinated Ni(Ⅱ)centers,bib,and Hpdc2-ligands in complex 1,while a 2D network is built by Ni(Ⅱ)and bib ligands in 2.Furthermore,the quantum⁃chemical calculations have been performed on‘molecular fragments’extracted from the crystal structure of 1 using the PBE0/LANL2DZ method in Gaussian 16 and the VASP program.CCDC:2343794,1;2343798,2.
基金supported by the Natural Science Foundation of Fujian Province (No.2010J01029)the Foundation of Education Committee of Fujian Province (No.JB11002)
文摘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）.
基金Supported by the National Natural Science Foundation of China(No.21373132)the Science Foundation of Education Department of Shaanxi Provincial Government(No.12JK0637)
文摘A new Cd（Ⅱ） coordination polymer, namely, [Cd（1,3-bip）（3,5-pdc）]n （1,3-bip = 1,3-bis（imidazol）propane and 3,5-pdc = pyridine-3,5-dicarboxylic acid） has been synthesized under hydrothermal conditions. Compound 1 was characterized by infrared spectrum, elemental analysis, powder X-ray diffraction （PXRD） and single-crystal X-ray diffraction analysis. It crystallizes in monoclinic, space group P21/c with a = 1.40178（7）, b = 1.72502（12）, c = 1.41635（6） ran, β = 92.653（4）°, V = 3.4212（3） nm3, Z = 4, C16HIsCdNsO4, Mr = 453.73, Dc = 1.762 g/cm3, F（000） = 1808,μ = 1.310 mm1, R = 0.0899 and wR = 0.1945. In compound 1, each 3,5-pdc ligand links three Cd（lI） ions and each Cd（Ⅱ） attaches to bip ligands to form a complicated 2D double-layer structure. In addition, the thermal stability and luminescent property of 1 have been studied in the solid state at room temperature.
文摘A new 2D Zn（Ⅱ） coordination polymer [Zn（HIDC）（bix）0.5]n（1） was obtained by the hydrothermal reaction of ZnCl2,imidazole-4,5-dicarboxylic acid（H3IDC） and 1,4-bis（imidazol-1-ylmethyl）-benzene（bix） with a 2：2：1 mole ratio.X-ray diffraction crystal structural analysis reveals it crystallizes in monoclinic,space group P21/n with a = 12.125（3）,b = 10.541（3）,c = 12.484（3） ,β = 115.834（4）°,V = 1436.0（6） 3,Mr = 338.60,Z = 4,Dc = 1.566 Mg·m-3,F（000） = 684,μ（MoKα） = 1.730 mm-1,the final R = 0.0439 and wR = 0.0888 for 2101 observed reflections with I ≥ 2σ（I）.In 1,each zinc（Ⅱ） ion is five-coordinated with a slightly distorted trigonal bipy-ramidal coordination geometry,and each μ2-HIDC2-acts as a bridge to bond two neighboring Zn（Ⅱ） ions,leading to a 1D zigzag chain architecture.The adjacent zigzag chains are further linked by μ2-bix to form an infinite 2D network structure.The fluorescence spectrum of 1 exhibits intense emission at 466 nm when excited at 397 nm in solid state at room temperature.
基金Supported by the Natural Science Foundation of Hunan Province(2019JJ60021,2019JJ50013)the Scientific Research Found of Education Department of Hunan Province(17A049)Industry and Research Key Project of Hengyang City(2018KJ016,HXKJ201942,2017KJ193)
文摘A new copper(Ⅱ)coordination polymer[Cu5(Hpt)5(H2O)2(2,3-PCA)2]n·12nH2O(1)has been successfully synthesized under hydrothermal conditions with copper hydroxide,3-(pyridin-2-yl)-1,2,4-triazole(Hpt)and 2,3-pyridinedi-carboxylic acid(2,3-PCA).The structure of the title compound was determined by X-ray diffraction analyses,elemental analyses and IR spectrum.The architecture of 1 consists of one-dimensional sandwich-like chains which are connected by extensive hydrogen bonding interactions.The solid-state photoluminescence displays an obvious emission band at 384 nm upon excitation at 340 nm.In addition,electrochemistry property has also been studied.
基金Supported by the Natural Science Foundation of Guangxi Province(No.2017GXNSFAA198268)the Foundation of Guangxi Key Laboratory of Electrochemical and Magneto-chemical Functional Materials(EMFM20161102)the National Natural Science Foundation of China(No.61765005)
文摘One new coordination polymer, [Mn(Hbtc)(bpy)(HO)]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(Hbtc) 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.
文摘One-dimensional chain copper（Ⅱ） coordination polymer has been synthesized and characterized in the solvent mixture of water and alcohol with o-acetamidobenzoic acid,4,4＇-bipyridine and copper perchlorate.It is of tetragonal,space group P41212 with a=1.57756（10）,b= 1.57756（10）,c=2.1438（3）nm,V=5.3352（8） nm^3,Dc=1.524 g/cm^3,Z=4,F（000）=2536,R= 0.0479 and wR=0.0979.The crystal structure shows two coordination modes.The copper（1） is coordinated with two nitrogen atoms of one 4,4＇-bipyridine molecule and two oxygen atoms from two o-acetamidobenzoic acid molecules,forming a distorted tetrahedral coordination geometry; the copper（2） is coordinated with two nitrogen atoms of one 4,4＇-bipyridine molecule,four oxygen atoms from two o-acetamidobenzoic acid molecules and two water molecules,generating a distorted octahedral coordination geometry.The result of TG analysis shows that the title complex is stable below 180.0 ℃.
基金supported by the Natural Science Foundation of Shanxi Province(2012021005-2)
文摘A new polymeric znic（II） coordination polymer, [Zn2（bptc）·（H2O）4]n·nC H3 OH 1, was synthesized by the hydrothermal reaction of Zn（NO3）2·6H2O with 1,1＇-biphenyl-2,2＇,6,6＇-tetracarboxylic acid（H4bptc） and structurally characterized by single-crystal diffraction, IR and elemental analysis. The polymer crystallizes in the orthorhombic system, space group Pnna with a = 13.411（1）, b = 16.418（2）, c = 9.178（7）, V = 2025.2（3） 3, Z = 4, C17H14O13Zn2, Mr = 557.06, Dc = 1.827 g/cm3, F（000） = 1120, μ（MoK α） = 2.439 mm-1. The final R and wR are 0.0548 and 0.1691 for 1279 observed reflections with I 2（I）. In this compound, the bptc4- anion adopts monodentate bridging coordination modes connecting the zinc（II） ions to form a 1D chain structure, which furnishes a 2D supramolecular architecture through hydrogen bonding interactions formed by carboxylic oxygen atoms of bpdc, oxygen atoms of crystalline methanol and water molecules. Complex 1 displays an emissive maximum at 435 nm in the solid state at room temperature.
基金supported by the Foundation of Suzhou Science and Technology of Jiangsu Province(SYN201015)Key Laboratory of Advanced Functional Materials of Jiangsu Province of China (No.10KFJJ002)
文摘Reactions of CdX2（X=NO3-, ClO4-） with Hatza （atza=5-aminotetrazole-1-acetato anion） and 2,2′-bipyridine （2,2′-bipy） or 1,10-phenanthroline （1,10-phen） in a methanol/aqueous solution produced a set of new Cd（Ⅱ） coordination polymers, {[Cd（atza）（H2O）（2,2′-bipy）]ClO4}n （1）, {[Cd（atza）（H2O）（1,10-phen）]ClO4 }n （2）, {[Cd（atza）（H2O）（2,2′-bipy）]NO3}n （3） and {[Cd（atza）2 （1,10-phen）]·0.5H2O}n （4）. Single-crystal X-ray diffraction analysis reveals that each Cd（Ⅱ） ion has a distorted octahedral coordination geometry in 1-4, and the Cd（Ⅱ） ion centers are connected through the tridentate atza bridging ligands to form a 2D layer （1-3） or ID chain （4） structure. The fluorescent properties of 2 and 4 are also discussed.
基金Supported by the key project of Science,the Technology Department of Henan province(No.112102210371)the science and technology research projects of Education Department of Henan province(No.12B150003)
文摘A two-dimensional（2D） 44 topological ZnⅡ coordination polymer {[Zn2Cl2（L）（4bpy）2]}∞（H2L = anthracene-9,10-dicarboxylic acid, 4bpy = 4,4ˊ-bipyridine） based on binuclear [Zn2Cl2] nodes has been synthesized and characterized by IR, elemental analysis, X-ray powder diffraction and single-crystal X-ray diffraction analysis. Moreover, the luminescent properties of the correspon- ding compound have been briefly investigated.
基金supported by the Shanghai Leading Academic Discipline Project B 108 and Science & Technology Commission of Shanghai Municipality (08DZ2270500)
文摘A new coordination polymer [Ni（3-bpo）（m-bdc）（C2H5OH） 2]n（1,3-bpo = 2,5-bis（3-pyridyl） -1,3,4-oxadiazole,m-H2bdc = 1,3-benzenedicarboxylic acid） was solvothermally synthesi-zed and characterized by IR,TGA and single-crystal X-ray diffraction. The title complex crystalli-zes in the orthorhombic system,space group Pnma with a = 7.786（3） ,b = 17.253（6） ,c = 18.478（6） ,V = 2481.9（14） A^3,Mr = 539.18,Dc = 1.443 g/cm^3,Z = 4,R = 0.0353 and wR = 0.0589. The m-bdc and 3-bpo bridge two Ni（Ⅱ） ions through two carboxylate groups and two pyridyl groups forming a 1D infinite double-sinusoidal chain along the c axis. The photoluminescence of 1 shows a large red shift compared to that of free ligands in the solid state.
文摘A novel manganese（Ⅱ） coordination polymer with 2-（4-carboxyphenoxy） benzoic acid （2,4＇-H2oba） and 1,10-phenanthroline （1,10-phen） has been prepared by hydrothermal synthesis and characterized by single-crystal X-ray diffraction, IR and elemental analysis. Compound [Mn（2,4＇-oba）（1,10-phen）] is of monoclinic system, space group P21/n with a = 7.960（1）, b = 15.464（2）, c = 18.703（3）A, β = 99.976（2）°, V = 2267.5（6） A^3, Z = 4, Mr = 491.35, Dc = 1.439 g/cm^3, F（000） = 1004 and μ = 0.623 cm·1. The final R = 0.0419 and wR = 0.0978 for 3444 observed reflections with I 〉 2σ（I）. X-ray diffraction analysis reveals that the oba2-ligands adopt a bis（chelating bidentate） mode to link two Mn（Ⅱ） centers to form an infinite 1D helical chain. Furthermore, a 3D supramolecular structure was formed by π-π stacking interactions and hydrogen bonds.
基金supported by the National Natural Science Foundation of China(Nos.21271098 and 21371089)Science and Technology Research Key Project of the Education Department of Henan Province(No.14B150034)
文摘A new 3D copper（Ⅱ） coordination polymer, {[Cu_2（tbip）_2（1,3,5-tib）]×2H_2O}n（1, H_2 tbip = 5-tert-butyl isophthalic acid, 1,3,5-tib = 1,3,5-tris（1-imidazolyl）benzene）, has been synthesized by hydrothermal reaction of Cu（OAc）_2·4H_2O, H_2 tbip and 1,3,5-tib. It has been structurally characterized by element analysis, IR and magnetic measurement. X-ray single-crystal analysis was carried out for 1, which crystallizes in the triclinic system, space group P1 with a = 7.822（3）, b = 15.854（6）, c = 17.553（6） ？, a = 113.033（4）, β = 90.694（4）, g = 101.006（4）°, V = 1957.3（12） ？~3, Z = 1, D_c = 1.493 g/cm^3, M_r = 1759.70, F（000） = 908, R = 0.0721 and w R = 0.1978 with I 〉 2s（I）. The single-crystal X-ray diffraction studies reveal that compound 1 exhibits 2D [Cu（tbip）] layers which are further pillared by 1,3,5-tib ancillary ligand with terminal tridentate coordination mode to generate the final 3D structure. Magnetic susceptibility data for 1 have been measured in the range of 2~300 K. There are antiferromagnetic interactions between copper ions of the compound.
基金the financial support from the National Natural Science Foundation of China(21171135)Hubei Provincial Science & Technology Department(2011BFA020)Hubei Independent Innovation Base(HBIR07)
文摘A polymer, [NiL（bipy）·2H2O]n（1, bipy = 4,4ˊ-bipyridine）, has been acquired by the reaction of Ni（OAc）2·4H2O with N,Nˊ-bis（2-hydroxyl-5-fluorobenzyl）-2-hydrxylpropane dii- mine in the presence of 4,4ˊ-bipyridine. X-ray crystallographic analysis shows that it is comprised of a mononuclear Ni（Ⅱ） complex [NiL] linked by 4,4ˊ-bipyridine. Its crystal crystallizes in the orthorhombic system, space group C2/c with a = 22.595（3）, b = 18.395（2）, c = 15.434（2） , V = 6155（1）3, Dc = 1.259 g/cm-3, Z = 8, Mr = 583.23, F（000） = 2416.0, μ（MoKa） = 0.681 mm-1, S = 1.049, R = 0.0512 and wR = 0.1108 for 6032 observed reflections（I 〉 2σ（I））. There are water hexamers in the complex. A weak overall ferromagnetic behavior has been evaluated by Curie-Weiss rule and by the formula of alternating ferro-ferromagnetic coupling in one-dimensional Ni（Ⅱ） chain, which gives g = 2.005（1） and J1 = 0.31（3） cm-1.
基金Supported by Guangdong Province Higher Vocational Colleges&Schools Pearl River Scholar Funded Scheme(2015)the Natural Science Foundation of Guangdong Province(No.2016A030313761)+3 种基金Science and Technology Planning Project of Guangzhou(No.201510010170)the Pearl River Scholar Foundation of Guangdong Industry Polytechnic(No.RC2015-001)the Opening Foundation of MOE Key Laboratory of Bioinorganic and Synthetic Chemistry School of Chemistry Sun Yat-Sen University(2016)National Natural Science Foundation of China(No.11272093)
文摘Two coordination polymers, namely {[Mn（HL_1）（phen）]·4H_2O}_n（1） and [Co_2（HL_2）_2（H_2O）_2]_n（2） have been constructed hydrothermally using H_3L_1 and H_3L_2（H_3L_1 = 2-（5-carboxypyridin-2-yl）terephthalic acid, H_3L_2 = 2-（4-carboxypyridin-3-yl）terephthalic acid）, phen, MnCl_2×4H_2O and CoCl_2×6H_2O. The products were isolated as stable crystalline solids and were characterized by IR spectroscopy, elemental, thermogravimetric（TGA）, powder（PXRD） and single-crystal X-ray diffraction analyses. Compound 1 features a 3D framework structure, which was topologically classified as a trinodal 4,6,6-connected net with the unique topology defined by the point symbol of（3^（10）.5.6~4）4（3^（10）.6.7~4）2（5.6~2.8~2.9）. Compound 2 possesses a 2D metal-organic layer, which was topologically classified as a binodal 4,4-connected layer defined by the point symbol of（4~3.6~2.8）. The layers are further extended into a 3D supramolecular framework via hydrogen bonds. The magnetic properties for both compounds were also investigated, indicating antiferromagnetic interactions between the adjacent metal ions.
基金Supported by the National Natural Science Foundation of China(No.21607051)the Science and Technology Research Projects of the Education Committee of Jilin Province(No.JJKH20180779KJ)
文摘The new manganese（Ⅱ） coordination compound, [Mn（Cl）2（L）2]（1, L = 11-fluorodipyrido[3,2-a:2?,3?-c]phenazine）, has been achieved under hydrothermal conditions. The structure of compound 1 was determined by single-crystal X-ray diffraction. 1 crystallizes in monoclinic system, space group C2/c with a = 8.419（2）, b = 12.286（2）, c = 28.451（6） ?, β = 95.889（3）°, V =2927.5（10） ?3, Z = 4, C36 H16 MnF2 Cl2 N8, Mr = 724.41, Dc = 1.644 g/cm3, F（000） = 1460, μ（Mo Ka）= 0.691 mm-1, R = 0.0445 and wR = 0.0982. Adjacent compounds are stacked by one type of π-πinteraction among L ligands to generate a 1D supramolecular chain. Further, the 1D supramolecular chains are stacked by another type of π-π interaction among L ligands to give a 2D supramolecular layer. Moreover, the C-F···π interactions between the carbon atom of the L ligand and the pyrazine ring of the adjacent L ligand further stabilize the supramolecular layer of 1. In addition, natural bond orbital（NBO） analysis has been calculated by the B3LYP/LANL2DZ method, which shows obvious covalent interaction between the coordinated atoms and Mn（Ⅱ） ion.
基金supported by Key Laboratory for the Chemistry and Molecular Engineering of Medicinal Resources(Guangxi Normal University),Ministry of Education of China(No.CMEMR2011-13)the Scientific research and technological development project of Guilin(No.20110330)
文摘A new complex [Cu（L）（1,10-phen）]n （1, L = N-3-pyridine sulfonyl amino acid） has been synthesized and characterized by IR, elemental analysis and X-ray diffraction analysis, and its crystal belongs to monoclinic, space group P2Jc with a = 11.481 （2）, b = 1 8.094（4）, c = 8.5198（17） ]°, β= 102.26（3）°, V = 1729.5（6） ,/k3, Z = 4, Dc = 1.759 g/cm3, F（000） = 932, p = 1.422 mm-1, R = 0.0368 and wR = 0.0893. In 1, the Cu（ll） ion adopts a slightly distorted five-coordinated square pyramidal geometry. The L2- ligand adopts O of the carboxyl bridging adjacent Cu（Ⅱ）units to form an infinite chain structure along the c axis. Also, π-π stacking interactions between the adjacent chains expanded the 1-D structures into a 3-D supramolecular structure.
基金supported by the National Natural Science Foundation of China(No.21571118)
文摘The title Mn（Ⅱ） coordination polymer,poly{[heptaaqua-（μ4-bi-phenyl-3,3？,5,5？-tetracarboxylate）-bimanganese（Ⅱ）] pentahydrate},[Mn_2（bpta）（H_2O）_7]_n·5n H_2O（I）,is crystallized from a mixture of biphenyl-3,3？,5,5？-tetracarboxylic acid（H_4bpta） and MnCl_2·4H_2O in waterethanol under room temperature. Its asymmetric unit consists of one and two halves of crystallographically independent Mn（Ⅱ） cations,one fully deprotonated H4 bpta ligand,seven coordinated water molecules and five solvent water as guest molecules. In I,each Mn（Ⅱ） atom is octahedrally coordinated by six oxygen atoms from bpta^（4-） anions and coordinated water molecules. In the Mn（Ⅱ） cations,one half Mn（Ⅱ） ion of them located at a 2-fold axis generating a trinuclear [Mn_3（H_2O）_2（RCOO）_2] linker by μ1,1-O（water） and μ1,3-O,O？（carboxylate） bridges and another half Mn（Ⅱ） ion with an inversion is a mononuclear linker. These neighbouring trinuclear and mononuclear Mn（Ⅱ） cations are linked together by biphenyl-3,3？,5,5？-tetracarboxylates to form a three-dimensional framework with a（42.84） topology of a（4,4）-connected net,in which the positions of the trinuclear [Mn_3（H_2O）_2（R-COO）_2] linker as a 4-connector linking four bpta^（4-） ligands in I reproduce an eagle-shaped arrangement. The polymeric structure exhibits a water channel with an accessible void of 797.1 ？~3,amounting to 15.7% of the total unit-cell volume. Each of the cavities in the network is occupied by solvent water molecules.
基金supported by the National Natural Science Foundation of China(Nos.21571118&21271121)
文摘A new coordination polymer {[Cd（C_（21）H_（14）N_6）（C_8H_4O_4）]·H_2O}_n（1） was synthesized by an elaborate design via the reaction of 3-（2,6-di（pyrazin-2-yl）pyridin-4-yl）-1H-indole（bppi）,1,4-benzene-dicarboxylic acid（H2bdc） and cadmium（Ⅱ） nitrate in CH_3OH/H_2O mixed solvents. Complex 1 crystallizes in orthorhombic,space group Ccca with a = 20.012（4）,b = 31.881（6）,c = 19.808（4） ？,V = 12638（4） ？~3,Z = 16,C_（29）H_（20）CdN_6O_5,M_r = 644.91,D_c = 1.356 g·cm^（-3）,μ = 0.735 mm^（-1）,F（000） = 5184,GOOF = 1.046,the final R = 0.0405 and wR = 0.1063 for 6870 observed reflections（I 〉 2σ（I））. The Cd（Ⅱ） centre is hepta-coordinated by three N and four O atoms from one bppi terminal ligand and two bdc2– ligands,respectively,displaying a capped trigonal prism geometry. Structure extension gives coordination polymeric chains,in which the bdc2– linkers connect Cd（Ⅱ） cations into a one-dimensional（1D） coordination polymer along the c axis,giving zigzag chains with the Cd···Cd separation of 11.178（1） ？. The adjacent bppi terminal ligands in the chains are anti-periplanar conformation. The three-dimensional（3D） structure is stabilized by π···π stacking and hydrogen-bonding interactions to form a supramolecular self-penetrating network with 1D channels. In 1,there are voids 2999.7 ？~3 with 23.7% of per unit cell volume. Thermal analysis indicates that the framework of 1 is stable until 651 K and the photoluminescence of 1 in the solid shows very weak fluorescence at 382 and 560 nm upon excitation at 310 nm.
基金Supported by the National Natural Science Foundation of China(21371052)
文摘One new coordination polymer, [Ni（m-bix）（m-BDC）]（1, m-bix = 1,3-bis（imidazol-1-ylmethyl）benzene, m-BDC = 1,3-benzenedicarboxylic acids）, has been hydrothermally synthesized and structurally characterized by elemental analysis, IR, TGA and X-ray single-crystal diffraction. The green block crystal of complex 1（C22H18N4Ni O4） belongs to monoclinic system, space group P21/c with a = 10.0418（3）, b = 23.8651（6）, c = 8.7872（2） A, β = 112.333（3）°, V = 1947.88（9）A3, Z = 4, Dc = 1.572 g/cm^3, Mr = 461.11, F（000） = 952, R = 0.0335 and w R = 0.0683 for 2827 observed reflections（I 〉 2σ（I））. Complex 1 exhibits a novel 6-connected 3D sxd type topological framework. The magnetic characterization of complex 1 shows antiferromagnetic coupling exchange.
