A new cooper benzenedicarboxylate metal-organic coordination polymer,[Cu（μH2O）（BDC）]n·nDMF（1,H2BDC = 1,4-benzenedicarboxylate acid,DMF = N,N＇-dimethylfor-mamide）,has been successfully synthesized under hy...A new cooper benzenedicarboxylate metal-organic coordination polymer,[Cu（μH2O）（BDC）]n·nDMF（1,H2BDC = 1,4-benzenedicarboxylate acid,DMF = N,N＇-dimethylfor-mamide）,has been successfully synthesized under hydrothermal conditions and characterized by IR spectroscopy,elemental analysis,thermogravimetric analysis and single-crystal X-ray diffraction.This complex crystallizes in triclinic,space group P1 with a = 6.605,b = 10.44780（10）,c = 11.0881（6） ,α = 62.064（11）,β = 73.410（15）,γ = 78.404（16）°,C11H13CuNO6,Mr = 318.76,V = 645.79（8） 3,Z = 2,Dc = 1.639 g/cm3,F（000） = 326,μ = 1.712 mm-1,the final R = 0.0362 and wR = 0.1330 for 2055 observed reflections with I 〉 2σ（I）.The title compound contains infinite inorganic chains constructed by Cu oxygen octahedra by sharing corners and edges.Each chain is connected by BDC linkers to four other chains to form a three-dimensional framework with irregular rhombic channels where the DMF molecules are encapsulated.展开更多
The crystal structure of a novel Eu^(3+) coordination polymer, {[Eu(m-BDC)(NO_3)(Phen)(H_2O)]_2·2CH_3CH_2OH}_n (m-BDC=1,3-benzenedicarboxylate, Phen=1, 10-phenanthroline), was obtained and its high-resolution lum...The crystal structure of a novel Eu^(3+) coordination polymer, {[Eu(m-BDC)(NO_3)(Phen)(H_2O)]_2·2CH_3CH_2OH}_n (m-BDC=1,3-benzenedicarboxylate, Phen=1, 10-phenanthroline), was obtained and its high-resolution luminescence spectra at 77K were measured. The μ_2-carboxylate of m-BDC constructs the binuclear building block in which each Eu^(3+) ion is coordinated by four oxygen atoms of m-BDC anions, one oxygen atom from water molecule, two oxygen atoms of nitrate and two nitrogen atoms of Phen, respectively. The μ_1-carboxylate of m-BDC conjugates the binuclear units one-dimensional chain or a ribbon, while the hydrogen bonds between ribbons assemble the structure two-dimensional layer with a thickness equaling to the width of the ribbon. The luminescence spectra reveal that the two Eu^(3+) ion sites in the binuclear building blocks have slight environmental difference. The C_1 local symmetry of Eu^(3+) ion is concluded from both crystal structure measurement and luminescence spectra.展开更多
An unusual zinc(Ⅱ)coordination polymer[Zn_(5)(OH)_(2)(bbtz)_(2)(bdc)_(4)]_(n)(1)[bbtz=1,4-bis(1,2,4-triazol-1-ylmethyl)benzene,bdc=1,2-benzenedicarboxylate]was synthesized and characterized.1 contains an unusual 2D n...An unusual zinc(Ⅱ)coordination polymer[Zn_(5)(OH)_(2)(bbtz)_(2)(bdc)_(4)]_(n)(1)[bbtz=1,4-bis(1,2,4-triazol-1-ylmethyl)benzene,bdc=1,2-benzenedicarboxylate]was synthesized and characterized.1 contains an unusual 2D network based on pentanuclear zinc(Ⅱ)cluster[Zn_(5)(OH)_(2)].Two adjacent pentanuclear Zn(Ⅱ)clusters are bridged by four bdc ligands and extend to form the one-dimensional chain.The bbtz ligands further link the one-dimensional chains,resulting in a two-dimensional coordination network.The luminescence and thermal stability were investigated.展开更多
Two coordination polymers with 1,4-benzenedicarboxylic acid（H2BDC） ligand, namely, [Tb3（BDC）（4.5）（H2O）（DMF）2]n （1） and [Tb2（BDC）3（H2O）2（DMF）2]n（2）, have been synthesized and characterized. Both com...Two coordination polymers with 1,4-benzenedicarboxylic acid（H2BDC） ligand, namely, [Tb3（BDC）（4.5）（H2O）（DMF）2]n （1） and [Tb2（BDC）3（H2O）2（DMF）2]n（2）, have been synthesized and characterized. Both compounds crystallize in the triclinic system, space group P1. For compound 1, a = 10.8528（5）, b = 12.2516（5）, c = 16.9031（7） A, α = 104.462（1）, β = 93.659（1）, γ = 101.404（1）°, V = 2118.1（2） A^3, Z = 2, C（42）H（34）N2O（21）Tb3, Mr = 1379.47, Dc = 2.163 g/cm^3, μ = 5.045 mm^-1, F（000） = 1326, the final R = 0.0212 and wR = 0.0570 for 8592 observed reflections with I 〉 2σ（I）. For compound 2, a = 8.547（1）, b = 10.170（1）, c = 11.192（1）A？, α = 65.531（1）, β = 71.886（1）, γ = 78.796（1）°, V = 839.2（2） A^3, Z = 1, C（30）H（30）N2O（16）Tb2, Mr = 992.40, Dc = 1.964 g/cm^3, μ = 4.257 mm^-1, F（000） = 482, the final R = 0.0220 and wR = 0.0649 for 3626 observed reflections with I 〉 2σ（I）. The compounds exhibit different structural topologies depending on the nature of templating agents in the reactions though the templating agents are not incorporated in the final solids. Compound 1 exhibits a three-dimensional（3D） framework based on the rod-shaped terbium-carboxylate building blocks constructed from linear trinuclear Tb3 units. Compound 2 has a 3D framework containing two interpenetrating pcu topological networks based on the 6-connected dinuclear Tb2 secondary building units. Photoluminescence studies show both compounds exhibit typical Tb（Ⅲ） luminescence emissions. An efficient ligand-to-Tb（Ⅲ） energy transfer is observed in the emission spectra for both compounds.展开更多
A zinc(II) complex [Zn(bdc)(py)·H 2O] n (bdc=1,4-benzenedicarboxylate, py=pyridine) has been prepared and characterized. Single crystal X-ray diffraction analysis reveals that the complex crystallizes in the mo...A zinc(II) complex [Zn(bdc)(py)·H 2O] n (bdc=1,4-benzenedicarboxylate, py=pyridine) has been prepared and characterized. Single crystal X-ray diffraction analysis reveals that the complex crystallizes in the monoclinic space group P2 1/n with a=0.84823(3), b=0.91440(3), c=1.65141(2) nm, β=91.243(2)°, V=1.28057(6) nm 3, Z=4. The coordination geometry at each Zn(II) center is a distorted tetrahedron. Two independent bdc ligands in a herringbone pattern link alternatively four-coordinated Zn(II) centers into a one-dimensional polymeric chain. Hydrogen bonds among coordinated water molecules and uncoordinated oxygen atoms of two independent bdc ligands from different polymeric chains extend one-dimensional polymeric chains into a three-dimensional structure.展开更多
Introducing inorganic nanomaterials into a polymer matrix greatly improves the anticorrosion performance of epoxy coatings(EP);however,poor compatibility between the materials can limit the improvement in properties.I...Introducing inorganic nanomaterials into a polymer matrix greatly improves the anticorrosion performance of epoxy coatings(EP);however,poor compatibility between the materials can limit the improvement in properties.In this work,based on the high interface compatibility of two-dimensional(2D)Co_(2)(OH)_(2)BDC(BDC=1,4-benzenedicarboxylate)in the epoxy coating that we reported in previous work,we fabricated a 2D Co_(2)(OH)_(2)BDC-halloysite nanotube(HNT)nanocomposite have a structure consisting of alternating of nanosheets and nanotube by in situ synthesis.The nanocomposite was characterized by Fourier transform infrared spectroscopy,X-ray diffraction,and scanning electron microscopy.The mechanical and anticorrosion performance of the 2D Co_(2)(OH)_(2)BDC-HNT/EP coating was evaluated by mechanical tests and electrochemical impedance spectroscopy spectra.Compared with a conventional unreinforced epoxy coating,the 2D Co_(2)(OH)_(2)BDC-HNT/EP coating had higher mechanical strength and toughness,and the low-frequency impedance modulus of 2D Co_(2)(OH)_(2)BDC-HNT/EP coating was increased by three orders of magnitude,demonstrating the high corrosion resistance of our reinforced coating.展开更多
The crystal structure of novel coordination polymer with excellent characteristic luminescence of Eu3+, the three-dimentional network of {Eu2(p-BDC)3(Phen)2(H2O)2}n is presented.
The hydrothermal reaction of Cd（OAc）2.H2O with 1,2-benzenedicarboxylate （1,2-BDC）, imidazole and H2O resulted in the formation of a binuclear polymeric Cd（ Ⅱ ） complex {[Cd2（1,2-BDC）2（Im）4].（H2O）}n which ...The hydrothermal reaction of Cd（OAc）2.H2O with 1,2-benzenedicarboxylate （1,2-BDC）, imidazole and H2O resulted in the formation of a binuclear polymeric Cd（ Ⅱ ） complex {[Cd2（1,2-BDC）2（Im）4].（H2O）}n which was then characterized by elemental analyses and single-crystal X-ray diffraction analysis. The crystal is of monoclinic system, space group P21/c with a = 14.6455（3）, b = 9.3530（2）, c = 23.7838（5）A, β= 106.6290（10）°, Cl12H104CdgN32O36, Mr = 3373.47, V = 3121.64（11）A^3, Dc = 1.795 g/cm^3, F（000） = 1672,μ= 1.428 cm^-1 and Z = 1. The final R = 0.0316 and wR = 0.0687 for 5045 reflections with I 〉 2σ（I）. In the title complex, the two Cd（ Ⅱ） ions are in different coordination environments with distorted octahedral and pengonal bipyramidal geometries, respectively. Two Cd polyhedra are linked together through one μ2-η^1：η^1 and one μ2-η^1：η^1 carboxylate groups from different 1,2-BDC ligands, giving rise to a binuclear Cd（ Ⅱ ） cluster, and such clusters are connected by bridged 1,2-BDC ligands to form a 2-D structure along the c axis. The inter- and intermolecular hydrogen bonds further connect the 2-D structures into a 3-D supramolecular network.展开更多
A new coordination polymer {[In（bdc）（OH）]·4H2O}n（H2bdc=1,4-benzenedi-carboxylic acid） has been synthesized through hydrothermal conditions,and was characterized by X-ray single-crystal diffraction and other...A new coordination polymer {[In（bdc）（OH）]·4H2O}n（H2bdc=1,4-benzenedi-carboxylic acid） has been synthesized through hydrothermal conditions,and was characterized by X-ray single-crystal diffraction and other measurements.The complex crystallizes in the orthorhombic system,space group Imma with a=18.3621（13）,b=7.1932（5）,c=11.8278（8）,V=1562.24（19）3,Z=4.Dc=1.565g/cm3,Mr=368.00,F（000）=728,μ（MoKα）=1.542 mm–1,S=1.019,R=0.0468 and wR=0.1326 for 884 observed reflections（＆gt;2σ（Ⅰ））.The title compound represents a 3-Dframework containing four kinds of tunnels in different shapes and sizes.展开更多
In the title compound, [Pb2(C8H4O4)2(C19H12N4O)2]n·3.5nH2O (1), has been synthesized by the hydrothermal assembly of 1,4-benzenedicarboxylate and 4-(1H-1,3,7,8-tetraazacyclopenta[l]-phenanthren-2-yl)phenol(TCPP) ...In the title compound, [Pb2(C8H4O4)2(C19H12N4O)2]n·3.5nH2O (1), has been synthesized by the hydrothermal assembly of 1,4-benzenedicarboxylate and 4-(1H-1,3,7,8-tetraazacyclopenta[l]-phenanthren-2-yl)phenol(TCPP) with lead acetate. Elemental analysis, X-ray crystal structure analysis, IR spectrum, thermogravimetric analysis and luminescence property were carried out for the structural determination and characterization of the title compound. Compound 1 crystallizes in triclinic, space group P1 with a=1.013 54(10) nm, b=1.104 84(11) nm, c=1.210 05(12) nm, α=76.812 0(10)°, β=74.814 0(10)°, γ=86.030 0(10)°, V=1.273 1(2) nm3, Pb2C54H39N8O13.5, Mr=1 430.31, Z=1, Dc= 1.866 g·cm-3, μ=6.680 mm-1, F(000)=691, R=0.027 3 and wR=0.068 7 for 4 042 observed reflections (I>2σ(I)). The compound 1 exhibits two-dimensional network structures, which are further stacked through π-π interactions and hydrogen bonds to form three-dimensional supramolecular polymer. Solid-state luminescent spectrum of the compound 1 indicates intense fluorescent emission. CCDC: 748883.展开更多
Two novel compounds, {[Cd（nbdc）（bpp）（H2O）]·H2O}n 1 and {[Cd（nbdc）（dpds）-（H2O）]·H2O}n 2（H2nbdc = 4-nitro-1,2-benzenedicarboxylic acid, bpp = 1,3-bis（4-pyridyl）propane and dpds = 4,4ˊ-dipyridyl...Two novel compounds, {[Cd（nbdc）（bpp）（H2O）]·H2O}n 1 and {[Cd（nbdc）（dpds）-（H2O）]·H2O}n 2（H2nbdc = 4-nitro-1,2-benzenedicarboxylic acid, bpp = 1,3-bis（4-pyridyl）propane and dpds = 4,4ˊ-dipyridyldisulfide）, were solvothermally synthesized and characterized by elemental analysis, IR spectroscopy, thermogravimetric analysis（TGA）, fluorescent analysis and single-crystal X-ray diffraction. Complex 1 is of monoclinic system, space group P21/c with a = 14.4370（17）, b = 8.4090（10）, c = 19.168（2） , β = 104.5050（10）°, V = 2252.8（5） 3, Dc = 1.639 g/cm3, Mr = 555.81, Z = 4, F（000） = 1120, μ = 1.022 mm-1, the final R = 0.0269 and wR = 0.0599 for 16656 observed reflections with I 〉 2σ（I）. 2 is isostructural to 1 with a = 14.4175（11）, b = 8.4737（7）, c = 18.0120（14） , β = 106.7220（10）°, V = 2107.5（3）3, Dc = 1.821 g/cm3, Mr = 577.85, Z = 4, F（000） = 1152, μ = 1.287 mm-1, the final R = 0.0280 and wR = 0.0705 for 15136 observed reflections with I〉 2σ（I）. Both complexes present intimately related structures featuring infinite Cd-carboxylate helix of [CdⅡ（nbdc）（H2O）]n connected by bpp（or dpds） molecule to produce the 2D layer frameworks.展开更多
A new cadmium-organic framework, [Cd2（TBDC）2（DMF）2（H2O）]n （1）, was synthesized by solvothermal reaction of rigid carboxylate ligand 2,3,5,6-tetramethyl-l,4-ben- zenedicarboxylate （H2TBDC） and cadmium nitrate...A new cadmium-organic framework, [Cd2（TBDC）2（DMF）2（H2O）]n （1）, was synthesized by solvothermal reaction of rigid carboxylate ligand 2,3,5,6-tetramethyl-l,4-ben- zenedicarboxylate （H2TBDC） and cadmium nitrate and characterized by elemental analysis, infrared spectrum, thermal analysis, PXRD, single-crystal X-ray diffraction and photoluminescence in the solid state. Compound 1 crystallizes in orthorhombic, space group Pca21 with a = 21.487（6）, b = 7.790（2）, c = 20.666（6） A, C30H40Cd2N2O11, Mr = 829.44, V= 3459.3（16） A3, Z = 4, Dc = 1.593 g.cm-3,μ = 1.29 mm-1, F（000） = 1672, 2.7〈θ〈27.2°, λ（MoKa） = 0.71073 A, T= 293（2） K, the final R = 0.026, wR = 0.0548 and S = 1.027. X-ray diffraction analysis reveals that complex 1 possesses a 3D framework and exhibits rnsw net. Thus, the solid-state luminescent spectrum of 1 displays that the emission of cadmium（lI） complex shows a peak at 317 nm upon 250 nm excitation at room temperature.展开更多
A novel nickel（Ⅱ） complex Ni（Iz）2（Bdc）（H2O）2 （Iz = imidazole, Bdc = 1,4-benzenedicarboxylate） has been synthesized and structurally characterized by X-ray analysis. The crystal is of monoclinic, space group...A novel nickel（Ⅱ） complex Ni（Iz）2（Bdc）（H2O）2 （Iz = imidazole, Bdc = 1,4-benzenedicarboxylate） has been synthesized and structurally characterized by X-ray analysis. The crystal is of monoclinic, space group P2 1/n with a = 5.5079（5）, b = 15.0973, c = 9.9825（9） A, β = 90.2380（10）°, C14H16N4NiO6, Mr = 395.02, Z = 2, V = 830.08（13） A^3 Dc = 1.580 g/cm^3, μ（MoKa） = 1.208 mm^-1, F（000） = 408, R = 0.0234 and wR = 0.0603 for 1379 observed reflections （I 〉 2σ（I））. In the title complex, adjacent nickel（Ⅱ） ions are bridged through the oxygen atoms of carboxylic groups in syn-anti conformation, yielding an infinite one-dimensional chain. These chains are linked to each other to form a 3-D network structure by three kinds of hydrogen-bonding interactions.展开更多
基金supported by 973 Program (2011CB932504)NNSFC (20971121)NSF of Fujian Province
文摘A new cooper benzenedicarboxylate metal-organic coordination polymer,[Cu（μH2O）（BDC）]n·nDMF（1,H2BDC = 1,4-benzenedicarboxylate acid,DMF = N,N＇-dimethylfor-mamide）,has been successfully synthesized under hydrothermal conditions and characterized by IR spectroscopy,elemental analysis,thermogravimetric analysis and single-crystal X-ray diffraction.This complex crystallizes in triclinic,space group P1 with a = 6.605,b = 10.44780（10）,c = 11.0881（6） ,α = 62.064（11）,β = 73.410（15）,γ = 78.404（16）°,C11H13CuNO6,Mr = 318.76,V = 645.79（8） 3,Z = 2,Dc = 1.639 g/cm3,F（000） = 326,μ = 1.712 mm-1,the final R = 0.0362 and wR = 0.1330 for 2055 observed reflections with I 〉 2σ（I）.The title compound contains infinite inorganic chains constructed by Cu oxygen octahedra by sharing corners and edges.Each chain is connected by BDC linkers to four other chains to form a three-dimensional framework with irregular rhombic channels where the DMF molecules are encapsulated.
文摘The crystal structure of a novel Eu^(3+) coordination polymer, {[Eu(m-BDC)(NO_3)(Phen)(H_2O)]_2·2CH_3CH_2OH}_n (m-BDC=1,3-benzenedicarboxylate, Phen=1, 10-phenanthroline), was obtained and its high-resolution luminescence spectra at 77K were measured. The μ_2-carboxylate of m-BDC constructs the binuclear building block in which each Eu^(3+) ion is coordinated by four oxygen atoms of m-BDC anions, one oxygen atom from water molecule, two oxygen atoms of nitrate and two nitrogen atoms of Phen, respectively. The μ_1-carboxylate of m-BDC conjugates the binuclear units one-dimensional chain or a ribbon, while the hydrogen bonds between ribbons assemble the structure two-dimensional layer with a thickness equaling to the width of the ribbon. The luminescence spectra reveal that the two Eu^(3+) ion sites in the binuclear building blocks have slight environmental difference. The C_1 local symmetry of Eu^(3+) ion is concluded from both crystal structure measurement and luminescence spectra.
基金the National Natural Science Foundation of China(No.21171126)the Priority Academic Program Development of Jiangsu Higher Education Institutions,the Funds of Key Laboratory of Organic Synthesis of Jiangsu Province and the University Student Innovation Program of Soochow University.
文摘An unusual zinc(Ⅱ)coordination polymer[Zn_(5)(OH)_(2)(bbtz)_(2)(bdc)_(4)]_(n)(1)[bbtz=1,4-bis(1,2,4-triazol-1-ylmethyl)benzene,bdc=1,2-benzenedicarboxylate]was synthesized and characterized.1 contains an unusual 2D network based on pentanuclear zinc(Ⅱ)cluster[Zn_(5)(OH)_(2)].Two adjacent pentanuclear Zn(Ⅱ)clusters are bridged by four bdc ligands and extend to form the one-dimensional chain.The bbtz ligands further link the one-dimensional chains,resulting in a two-dimensional coordination network.The luminescence and thermal stability were investigated.
基金Supported by the NNSFC(21361011)the Provincial Natural Science Foundation of Jiangxi(20151BAB203002)+1 种基金the Project of Education Department of Jiangxi Province(GJJ14235)the Open Project Program of Key Laboratory of Functional Small Organic Molecule,Ministry of Education,Jiangxi Normal University(KLFS-KF-201412)
文摘Two coordination polymers with 1,4-benzenedicarboxylic acid（H2BDC） ligand, namely, [Tb3（BDC）（4.5）（H2O）（DMF）2]n （1） and [Tb2（BDC）3（H2O）2（DMF）2]n（2）, have been synthesized and characterized. Both compounds crystallize in the triclinic system, space group P1. For compound 1, a = 10.8528（5）, b = 12.2516（5）, c = 16.9031（7） A, α = 104.462（1）, β = 93.659（1）, γ = 101.404（1）°, V = 2118.1（2） A^3, Z = 2, C（42）H（34）N2O（21）Tb3, Mr = 1379.47, Dc = 2.163 g/cm^3, μ = 5.045 mm^-1, F（000） = 1326, the final R = 0.0212 and wR = 0.0570 for 8592 observed reflections with I 〉 2σ（I）. For compound 2, a = 8.547（1）, b = 10.170（1）, c = 11.192（1）A？, α = 65.531（1）, β = 71.886（1）, γ = 78.796（1）°, V = 839.2（2） A^3, Z = 1, C（30）H（30）N2O（16）Tb2, Mr = 992.40, Dc = 1.964 g/cm^3, μ = 4.257 mm^-1, F（000） = 482, the final R = 0.0220 and wR = 0.0649 for 3626 observed reflections with I 〉 2σ（I）. The compounds exhibit different structural topologies depending on the nature of templating agents in the reactions though the templating agents are not incorporated in the final solids. Compound 1 exhibits a three-dimensional（3D） framework based on the rod-shaped terbium-carboxylate building blocks constructed from linear trinuclear Tb3 units. Compound 2 has a 3D framework containing two interpenetrating pcu topological networks based on the 6-connected dinuclear Tb2 secondary building units. Photoluminescence studies show both compounds exhibit typical Tb（Ⅲ） luminescence emissions. An efficient ligand-to-Tb（Ⅲ） energy transfer is observed in the emission spectra for both compounds.
基金ProjectsupportedbytheNationalNaturalScienceFoundationofChina (No .2 982 5 10 3) ,theNaturalScienceFoundation (No .8982 0 0 3)ofFujianProvinceandChineseAcademyofSciences
文摘A zinc(II) complex [Zn(bdc)(py)·H 2O] n (bdc=1,4-benzenedicarboxylate, py=pyridine) has been prepared and characterized. Single crystal X-ray diffraction analysis reveals that the complex crystallizes in the monoclinic space group P2 1/n with a=0.84823(3), b=0.91440(3), c=1.65141(2) nm, β=91.243(2)°, V=1.28057(6) nm 3, Z=4. The coordination geometry at each Zn(II) center is a distorted tetrahedron. Two independent bdc ligands in a herringbone pattern link alternatively four-coordinated Zn(II) centers into a one-dimensional polymeric chain. Hydrogen bonds among coordinated water molecules and uncoordinated oxygen atoms of two independent bdc ligands from different polymeric chains extend one-dimensional polymeric chains into a three-dimensional structure.
文摘Introducing inorganic nanomaterials into a polymer matrix greatly improves the anticorrosion performance of epoxy coatings(EP);however,poor compatibility between the materials can limit the improvement in properties.In this work,based on the high interface compatibility of two-dimensional(2D)Co_(2)(OH)_(2)BDC(BDC=1,4-benzenedicarboxylate)in the epoxy coating that we reported in previous work,we fabricated a 2D Co_(2)(OH)_(2)BDC-halloysite nanotube(HNT)nanocomposite have a structure consisting of alternating of nanosheets and nanotube by in situ synthesis.The nanocomposite was characterized by Fourier transform infrared spectroscopy,X-ray diffraction,and scanning electron microscopy.The mechanical and anticorrosion performance of the 2D Co_(2)(OH)_(2)BDC-HNT/EP coating was evaluated by mechanical tests and electrochemical impedance spectroscopy spectra.Compared with a conventional unreinforced epoxy coating,the 2D Co_(2)(OH)_(2)BDC-HNT/EP coating had higher mechanical strength and toughness,and the low-frequency impedance modulus of 2D Co_(2)(OH)_(2)BDC-HNT/EP coating was increased by three orders of magnitude,demonstrating the high corrosion resistance of our reinforced coating.
基金We are grateful to State Key Project of Foundational Research of China (G1998061308) and the National Natural Science Foundation of China (G200071004) for support of this research.
文摘The crystal structure of novel coordination polymer with excellent characteristic luminescence of Eu3+, the three-dimentional network of {Eu2(p-BDC)3(Phen)2(H2O)2}n is presented.
基金the National Natural Science Foundation of China(No.20774011)the Excellent Young Scholars Research Fund of Shanghai(No.YQ307007)
文摘The hydrothermal reaction of Cd（OAc）2.H2O with 1,2-benzenedicarboxylate （1,2-BDC）, imidazole and H2O resulted in the formation of a binuclear polymeric Cd（ Ⅱ ） complex {[Cd2（1,2-BDC）2（Im）4].（H2O）}n which was then characterized by elemental analyses and single-crystal X-ray diffraction analysis. The crystal is of monoclinic system, space group P21/c with a = 14.6455（3）, b = 9.3530（2）, c = 23.7838（5）A, β= 106.6290（10）°, Cl12H104CdgN32O36, Mr = 3373.47, V = 3121.64（11）A^3, Dc = 1.795 g/cm^3, F（000） = 1672,μ= 1.428 cm^-1 and Z = 1. The final R = 0.0316 and wR = 0.0687 for 5045 reflections with I 〉 2σ（I）. In the title complex, the two Cd（ Ⅱ） ions are in different coordination environments with distorted octahedral and pengonal bipyramidal geometries, respectively. Two Cd polyhedra are linked together through one μ2-η^1：η^1 and one μ2-η^1：η^1 carboxylate groups from different 1,2-BDC ligands, giving rise to a binuclear Cd（ Ⅱ ） cluster, and such clusters are connected by bridged 1,2-BDC ligands to form a 2-D structure along the c axis. The inter- and intermolecular hydrogen bonds further connect the 2-D structures into a 3-D supramolecular network.
基金supported by 973 Program (2006CB932900)NNSFC (20571074)NSF of Fujian (2007J172)
文摘A new coordination polymer {[In（bdc）（OH）]·4H2O}n（H2bdc=1,4-benzenedi-carboxylic acid） has been synthesized through hydrothermal conditions,and was characterized by X-ray single-crystal diffraction and other measurements.The complex crystallizes in the orthorhombic system,space group Imma with a=18.3621（13）,b=7.1932（5）,c=11.8278（8）,V=1562.24（19）3,Z=4.Dc=1.565g/cm3,Mr=368.00,F（000）=728,μ（MoKα）=1.542 mm–1,S=1.019,R=0.0468 and wR=0.1326 for 884 observed reflections（＆gt;2σ（Ⅰ））.The title compound represents a 3-Dframework containing four kinds of tunnels in different shapes and sizes.
文摘In the title compound, [Pb2(C8H4O4)2(C19H12N4O)2]n·3.5nH2O (1), has been synthesized by the hydrothermal assembly of 1,4-benzenedicarboxylate and 4-(1H-1,3,7,8-tetraazacyclopenta[l]-phenanthren-2-yl)phenol(TCPP) with lead acetate. Elemental analysis, X-ray crystal structure analysis, IR spectrum, thermogravimetric analysis and luminescence property were carried out for the structural determination and characterization of the title compound. Compound 1 crystallizes in triclinic, space group P1 with a=1.013 54(10) nm, b=1.104 84(11) nm, c=1.210 05(12) nm, α=76.812 0(10)°, β=74.814 0(10)°, γ=86.030 0(10)°, V=1.273 1(2) nm3, Pb2C54H39N8O13.5, Mr=1 430.31, Z=1, Dc= 1.866 g·cm-3, μ=6.680 mm-1, F(000)=691, R=0.027 3 and wR=0.068 7 for 4 042 observed reflections (I>2σ(I)). The compound 1 exhibits two-dimensional network structures, which are further stacked through π-π interactions and hydrogen bonds to form three-dimensional supramolecular polymer. Solid-state luminescent spectrum of the compound 1 indicates intense fluorescent emission. CCDC: 748883.
基金Supported by the Foundation for University Young Key Teacher by Henan Province(No.2011GGJS-153)the Foundation of Science and Technology of Henan province(No.112102310638 and 142300410301)
文摘Two novel compounds, {[Cd（nbdc）（bpp）（H2O）]·H2O}n 1 and {[Cd（nbdc）（dpds）-（H2O）]·H2O}n 2（H2nbdc = 4-nitro-1,2-benzenedicarboxylic acid, bpp = 1,3-bis（4-pyridyl）propane and dpds = 4,4ˊ-dipyridyldisulfide）, were solvothermally synthesized and characterized by elemental analysis, IR spectroscopy, thermogravimetric analysis（TGA）, fluorescent analysis and single-crystal X-ray diffraction. Complex 1 is of monoclinic system, space group P21/c with a = 14.4370（17）, b = 8.4090（10）, c = 19.168（2） , β = 104.5050（10）°, V = 2252.8（5） 3, Dc = 1.639 g/cm3, Mr = 555.81, Z = 4, F（000） = 1120, μ = 1.022 mm-1, the final R = 0.0269 and wR = 0.0599 for 16656 observed reflections with I 〉 2σ（I）. 2 is isostructural to 1 with a = 14.4175（11）, b = 8.4737（7）, c = 18.0120（14） , β = 106.7220（10）°, V = 2107.5（3）3, Dc = 1.821 g/cm3, Mr = 577.85, Z = 4, F（000） = 1152, μ = 1.287 mm-1, the final R = 0.0280 and wR = 0.0705 for 15136 observed reflections with I〉 2σ（I）. Both complexes present intimately related structures featuring infinite Cd-carboxylate helix of [CdⅡ（nbdc）（H2O）]n connected by bpp（or dpds） molecule to produce the 2D layer frameworks.
基金Supported by the NNSFC(Nos.90922014,21271117)NCET-11-0309+2 种基金the Shandong Natural Science Fund for Distinguished Young Scholars(JQ201003)Independent Innovation Foundation of Shandong University(2010JQ011)Fundamental Research Funds for the Central Universities(13CX05010A)
文摘A new cadmium-organic framework, [Cd2（TBDC）2（DMF）2（H2O）]n （1）, was synthesized by solvothermal reaction of rigid carboxylate ligand 2,3,5,6-tetramethyl-l,4-ben- zenedicarboxylate （H2TBDC） and cadmium nitrate and characterized by elemental analysis, infrared spectrum, thermal analysis, PXRD, single-crystal X-ray diffraction and photoluminescence in the solid state. Compound 1 crystallizes in orthorhombic, space group Pca21 with a = 21.487（6）, b = 7.790（2）, c = 20.666（6） A, C30H40Cd2N2O11, Mr = 829.44, V= 3459.3（16） A3, Z = 4, Dc = 1.593 g.cm-3,μ = 1.29 mm-1, F（000） = 1672, 2.7〈θ〈27.2°, λ（MoKa） = 0.71073 A, T= 293（2） K, the final R = 0.026, wR = 0.0548 and S = 1.027. X-ray diffraction analysis reveals that complex 1 possesses a 3D framework and exhibits rnsw net. Thus, the solid-state luminescent spectrum of 1 displays that the emission of cadmium（lI） complex shows a peak at 317 nm upon 250 nm excitation at room temperature.
基金This work was supported by the National Natural Science Foundation of China (No. 50572040)
文摘A novel nickel（Ⅱ） complex Ni（Iz）2（Bdc）（H2O）2 （Iz = imidazole, Bdc = 1,4-benzenedicarboxylate） has been synthesized and structurally characterized by X-ray analysis. The crystal is of monoclinic, space group P2 1/n with a = 5.5079（5）, b = 15.0973, c = 9.9825（9） A, β = 90.2380（10）°, C14H16N4NiO6, Mr = 395.02, Z = 2, V = 830.08（13） A^3 Dc = 1.580 g/cm^3, μ（MoKa） = 1.208 mm^-1, F（000） = 408, R = 0.0234 and wR = 0.0603 for 1379 observed reflections （I 〉 2σ（I））. In the title complex, adjacent nickel（Ⅱ） ions are bridged through the oxygen atoms of carboxylic groups in syn-anti conformation, yielding an infinite one-dimensional chain. These chains are linked to each other to form a 3-D network structure by three kinds of hydrogen-bonding interactions.
