A new dinuclear centrosymmetric complex [LaL（HL）（H2O）3]2（2H2O （H2L = 3-nitrophthalic acid, NPA） was synthesized in water/ethanol solution and characterized by X-ray diffraction, IR spectrum and TGA-DTA. The com...A new dinuclear centrosymmetric complex [LaL（HL）（H2O）3]2（2H2O （H2L = 3-nitrophthalic acid, NPA） was synthesized in water/ethanol solution and characterized by X-ray diffraction, IR spectrum and TGA-DTA. The complex crystallizes in triclinic system, space group P1^- with a = 8.1549（16）, b = 8.8856（18）, c = 15.277（3）A,α= 100.93（3）,α= 90.81（3）, γ= 104.56（3）°, V = 1049.8（4）A^3, Z = 1,μ= 2.125 mm^-1, Dc=1.994 g/cm^3, R = 0.0259 and wR = 0.0679. Two 3-nitrophthalates（2-） coordinate with the La3＋ ions in a bridging mode, and two monohydrogen- 3-nitrophthates（1-） and three waters in terminal ways, respectively. Each La^3＋ ion is nine-coordinated to exhibit a distorted tricapped trigonal prism coordination polyhedron. Both the coordinated and crystal waters are involved in the inter- and intramolecular hydrogen bonds. The dinuclear units are linked into a 2D network structure in the ab plane via intermolecular hydrogen bonds along the axes a and b. Two crystal waters fill each rhombic pore of the network. The networks are further packed along the c axis forming a layered supramolecular structure through the C-H…O weak forces between the adjacent sheets. TGA analysis shows the complex undergoes the loss of waters of crystallization and coordination and the decomposition of ligands sequentially.展开更多
Two complexes, [Cd（nphth）（2,2＇-bipy）（H20）]2.2H20 （1） and [Cd（nphth）（4,4＇- bipy）（H20）], （2） （nphth = 3-nitrophthalate, 2,2＇-bipy = 2,2＇-bipyridine, 4,4＇-bipy = 4,4＇-bipyridine）, were synthesized...Two complexes, [Cd（nphth）（2,2＇-bipy）（H20）]2.2H20 （1） and [Cd（nphth）（4,4＇- bipy）（H20）], （2） （nphth = 3-nitrophthalate, 2,2＇-bipy = 2,2＇-bipyridine, 4,4＇-bipy = 4,4＇-bipyridine）, were synthesized by hydrothermal reactions and structurally characterized. Complex 1 crystallizes in triclinic with space group Pi, a = 0.7599（4）, b = 1.0551（6）, c = 1.2448（6） nm, α = 88.96（2）, β = 75.40（2）, γ= 76.76（2）°, V= 0.9393（9） nm3, Z = 1, Dc = 1.816 Mg/m3, F（000） = 512, μ = 1.217 mm-1, S = 0.946, the final R = 0.0238 and wR = 0.0631, Complex 2 crystallizes in monoclinic, space group P21/c, a = 0.737（5）, b = 2.338（1）, c = 1.0030（6） nm, β = 96：359（9）°, V= 1.803（2） nm3, Z = 4, Dc = 1.826 Mg/m3, F （000） = 984,μ = 1.260 mm-1, S = 1.016, the final R = 0.0455 and wR = 0.1007. Complex 1 exhibits a discrete cyclic binuclear structure and complex 2 possesses a 2D layer structure with cyclic binuclear unit. The fluorescent spectrum study shows that complex 1 exhibits fluorescent emission in the solid state at room temperature.展开更多
基金This work was supported by the Beijing Talent Fund for Young Sci-Tech Researchers (No. H013610050112)
文摘A new dinuclear centrosymmetric complex [LaL（HL）（H2O）3]2（2H2O （H2L = 3-nitrophthalic acid, NPA） was synthesized in water/ethanol solution and characterized by X-ray diffraction, IR spectrum and TGA-DTA. The complex crystallizes in triclinic system, space group P1^- with a = 8.1549（16）, b = 8.8856（18）, c = 15.277（3）A,α= 100.93（3）,α= 90.81（3）, γ= 104.56（3）°, V = 1049.8（4）A^3, Z = 1,μ= 2.125 mm^-1, Dc=1.994 g/cm^3, R = 0.0259 and wR = 0.0679. Two 3-nitrophthalates（2-） coordinate with the La3＋ ions in a bridging mode, and two monohydrogen- 3-nitrophthates（1-） and three waters in terminal ways, respectively. Each La^3＋ ion is nine-coordinated to exhibit a distorted tricapped trigonal prism coordination polyhedron. Both the coordinated and crystal waters are involved in the inter- and intramolecular hydrogen bonds. The dinuclear units are linked into a 2D network structure in the ab plane via intermolecular hydrogen bonds along the axes a and b. Two crystal waters fill each rhombic pore of the network. The networks are further packed along the c axis forming a layered supramolecular structure through the C-H…O weak forces between the adjacent sheets. TGA analysis shows the complex undergoes the loss of waters of crystallization and coordination and the decomposition of ligands sequentially.
基金supported by the National Natural Science Foundation of China(21371088)the Education Department of Fujian Province(No.JK2012048,JA12310,JB12207)
文摘Two complexes, [Cd（nphth）（2,2＇-bipy）（H20）]2.2H20 （1） and [Cd（nphth）（4,4＇- bipy）（H20）], （2） （nphth = 3-nitrophthalate, 2,2＇-bipy = 2,2＇-bipyridine, 4,4＇-bipy = 4,4＇-bipyridine）, were synthesized by hydrothermal reactions and structurally characterized. Complex 1 crystallizes in triclinic with space group Pi, a = 0.7599（4）, b = 1.0551（6）, c = 1.2448（6） nm, α = 88.96（2）, β = 75.40（2）, γ= 76.76（2）°, V= 0.9393（9） nm3, Z = 1, Dc = 1.816 Mg/m3, F（000） = 512, μ = 1.217 mm-1, S = 0.946, the final R = 0.0238 and wR = 0.0631, Complex 2 crystallizes in monoclinic, space group P21/c, a = 0.737（5）, b = 2.338（1）, c = 1.0030（6） nm, β = 96：359（9）°, V= 1.803（2） nm3, Z = 4, Dc = 1.826 Mg/m3, F （000） = 984,μ = 1.260 mm-1, S = 1.016, the final R = 0.0455 and wR = 0.1007. Complex 1 exhibits a discrete cyclic binuclear structure and complex 2 possesses a 2D layer structure with cyclic binuclear unit. The fluorescent spectrum study shows that complex 1 exhibits fluorescent emission in the solid state at room temperature.
