The reaction of Cd（NO_3）_2·4H_2O with 4,4？-dipyridylacetylene（4,4？-DPA） and 2-nitroterephthalic acid（2-NO_2-H_2BDC） in DMF/H_2O mixed solvent has afforded a compound {[Cd（2-NO_2-BDC）（4,4？-DPA）]·...The reaction of Cd（NO_3）_2·4H_2O with 4,4？-dipyridylacetylene（4,4？-DPA） and 2-nitroterephthalic acid（2-NO_2-H_2BDC） in DMF/H_2O mixed solvent has afforded a compound {[Cd（2-NO_2-BDC）（4,4？-DPA）]·（DMF）}_n（1）. Compound 1 has been characterized by single-crystal X-ray diffraction, powder X-ray diffraction, thermogravimetry analysis, and IR spectrum. Compound 1 crystallizes in the monoclinic system, space group P21/n, with a = 12.1488（3）, b = 14.6689（3）, c = 13.1615（3） ？, β = 111.809（3）o, V = 2177.63（9） ？~3, Z = 4, C_（23）H_（18）N_4O_7 Cd, M_r = 574.81, D_c = 1.753 g/cm^3, μ = 8.523 mm^（-1）, F（000） = 1152, the final R = 0.0411 and wR = 0.1064 for 3589 observed reflections with I 〉 2s（I）. In compound 1, the Cd（Ⅱ） ions are linked by the carboxylate groups of 2-NO_2-BDC ligands to give a two-dimensional layered structure based on the centrosymmetric dinuclear Cd_2（COO）_2 units, which are further connected by the 4,4？-DPA ligands to produce a three-dimensional framework with pcu topology. Careful examination revealed that compound 1 is a 2-fold interpenetrating framework. Furthermore, the gas adsorption properties of 1 for N_2 and CO_2 have also been investigated.展开更多
A novel 3D hetero-nuclear framework,namely [K_2Cd_5（Hbptc）_4（H_2O）_（12）·12H_2O]_n（1,H4 bptc = biphenyl-2,3,3？,5？-tetracarboxylic acid）,was obtained by hydrothermal reaction. X-ray singlecrystal structur...A novel 3D hetero-nuclear framework,namely [K_2Cd_5（Hbptc）_4（H_2O）_（12）·12H_2O]_n（1,H4 bptc = biphenyl-2,3,3？,5？-tetracarboxylic acid）,was obtained by hydrothermal reaction. X-ray singlecrystal structure analysis reveals that polymer 1 crystallizes in orthorhombic,space group Pbcn with a = 26.6152（13）,b = 11.7449（5）,c = 29.5923（14） ？,V = 9250.3（7） ？~3,C_（64）H_（76）Cd_5K_2O_（56）,Mr = 2381.44,Dc = 1.710 g/cm^3,μ（MoK α） = 1.323 mm^（-1）,F（000） = 4744,Z = 4,the final R = 0.0668 and wR = 0.1135 for 10613 observed reflections（I 〉 2σ（I））. Polymer 1 displays a 3D network that is built on the unprecedented heterobimetallic [Cd_3Cd_2K] molecular building block with a（3,4）-connected（6·8·8）2（6·6·82·82·126·126） topology which represents a rare 2-fold interpenetrating 3D framework topology network. The luminescence analyses reveal that polymer 1 shows obvious emission at room temperature in the solid state. In addition,it was also characterized by elemental,IR spectra and TG analyses.展开更多
基金Supported by the National Natural Science Foundation of China(No.21361011 and 21101081)the Natural Science Foundation of Jiangxi Province(No.20151BAB203002)
文摘The reaction of Cd（NO_3）_2·4H_2O with 4,4？-dipyridylacetylene（4,4？-DPA） and 2-nitroterephthalic acid（2-NO_2-H_2BDC） in DMF/H_2O mixed solvent has afforded a compound {[Cd（2-NO_2-BDC）（4,4？-DPA）]·（DMF）}_n（1）. Compound 1 has been characterized by single-crystal X-ray diffraction, powder X-ray diffraction, thermogravimetry analysis, and IR spectrum. Compound 1 crystallizes in the monoclinic system, space group P21/n, with a = 12.1488（3）, b = 14.6689（3）, c = 13.1615（3） ？, β = 111.809（3）o, V = 2177.63（9） ？~3, Z = 4, C_（23）H_（18）N_4O_7 Cd, M_r = 574.81, D_c = 1.753 g/cm^3, μ = 8.523 mm^（-1）, F（000） = 1152, the final R = 0.0411 and wR = 0.1064 for 3589 observed reflections with I 〉 2s（I）. In compound 1, the Cd（Ⅱ） ions are linked by the carboxylate groups of 2-NO_2-BDC ligands to give a two-dimensional layered structure based on the centrosymmetric dinuclear Cd_2（COO）_2 units, which are further connected by the 4,4？-DPA ligands to produce a three-dimensional framework with pcu topology. Careful examination revealed that compound 1 is a 2-fold interpenetrating framework. Furthermore, the gas adsorption properties of 1 for N_2 and CO_2 have also been investigated.
基金supported by the National Natural Science Foundation of China(No.21273101 and 21302082)the Program for Science&Technology Innovation Talents in Universities of Henan Province(2014HASTIT014,14IRTSTHN008 and 164100510012)the Tackle Key Problem of Science and Technology Project of Henan Province(No.142102310483)
文摘A novel 3D hetero-nuclear framework,namely [K_2Cd_5（Hbptc）_4（H_2O）_（12）·12H_2O]_n（1,H4 bptc = biphenyl-2,3,3？,5？-tetracarboxylic acid）,was obtained by hydrothermal reaction. X-ray singlecrystal structure analysis reveals that polymer 1 crystallizes in orthorhombic,space group Pbcn with a = 26.6152（13）,b = 11.7449（5）,c = 29.5923（14） ？,V = 9250.3（7） ？~3,C_（64）H_（76）Cd_5K_2O_（56）,Mr = 2381.44,Dc = 1.710 g/cm^3,μ（MoK α） = 1.323 mm^（-1）,F（000） = 4744,Z = 4,the final R = 0.0668 and wR = 0.1135 for 10613 observed reflections（I 〉 2σ（I））. Polymer 1 displays a 3D network that is built on the unprecedented heterobimetallic [Cd_3Cd_2K] molecular building block with a（3,4）-connected（6·8·8）2（6·6·82·82·126·126） topology which represents a rare 2-fold interpenetrating 3D framework topology network. The luminescence analyses reveal that polymer 1 shows obvious emission at room temperature in the solid state. In addition,it was also characterized by elemental,IR spectra and TG analyses.
