Two coordination polymers of lanthanide complexes [（Dy）2（3,5-PDA）3（H2O）2]n 1 and [（Pr）2（3,5-PDA）3（H2O）3]n 2 （3,5-PDA = pyridine-3,5-dicarboxylate） have been synthesized under hydrothermal conditions. The...Two coordination polymers of lanthanide complexes [（Dy）2（3,5-PDA）3（H2O）2]n 1 and [（Pr）2（3,5-PDA）3（H2O）3]n 2 （3,5-PDA = pyridine-3,5-dicarboxylate） have been synthesized under hydrothermal conditions. The prepared compounds were characterized by elemental analysis, IR and TG analyses and single-crystal X-ray structure determination. Complex 1 crystallizes in monoclinic, space group C2/c with a = 14.104（2）, b = 11.1129（16）, c = 15.086（2） , β = 92.138（2）o, V = 2362.8（6） 3, Z = 4, C21H13Dy2N3O14, Mr = 856.34, Dc = 2.407 g·cm-3, F（000） = 1616, μ（MoKα） = 6.359 mm-1, the final R = 0.0422 and wR = 0.1016 for 2000 observed reflections with I 2σ（I）. Complex 2 crystallizes in triclinic, space group P with a = 8.9441（13）, b = 9.3959（14）, c = 14.625（2） , α = 98.065（2）, β = 95.481（2）, γ = 104.9130（10）o, V = 1164.7（3） 3, Z = 2, C21H15Pr2N3O15, Mr = 831.18, Dc = 2.370 g·cm-3, F（000） = 800, μ（MoKα） = 4.224 mm-1, the final R = 0.0355 and wR = 0.0731 for 4092 observed reflections with I 2σ（I）. These polymers are constructed from the 3,5-PDA ligand but they exhibit different kinds of metal-organic framework structures. Complexes 1 and 2 are constructed from M-C-O zigzag corner-linked chains （M = Dy and Pr）. In 1, the chains are composed of 8-coordinated DyⅢ centers, while the chains are made up of 8- and 9-coordinated PrIII centers in complex 2. These chains are cross-linked to each other by the pyridine rings of 3,5-PDA ligands, generating three-dimensional architectures. The magnetic behavior of compound 1 has been investigated, showing it exhibits antiferromagnetic interactions among the DyⅢ ions.展开更多
基金Supported by the NNSFC (No. 20761005)the Key Project of Chinese Ministry of Education (No. 205147)the Specialized Research Fund for the Doctoral Program of Higher Education (No. 20060673015)
文摘Two coordination polymers of lanthanide complexes [（Dy）2（3,5-PDA）3（H2O）2]n 1 and [（Pr）2（3,5-PDA）3（H2O）3]n 2 （3,5-PDA = pyridine-3,5-dicarboxylate） have been synthesized under hydrothermal conditions. The prepared compounds were characterized by elemental analysis, IR and TG analyses and single-crystal X-ray structure determination. Complex 1 crystallizes in monoclinic, space group C2/c with a = 14.104（2）, b = 11.1129（16）, c = 15.086（2） , β = 92.138（2）o, V = 2362.8（6） 3, Z = 4, C21H13Dy2N3O14, Mr = 856.34, Dc = 2.407 g·cm-3, F（000） = 1616, μ（MoKα） = 6.359 mm-1, the final R = 0.0422 and wR = 0.1016 for 2000 observed reflections with I 2σ（I）. Complex 2 crystallizes in triclinic, space group P with a = 8.9441（13）, b = 9.3959（14）, c = 14.625（2） , α = 98.065（2）, β = 95.481（2）, γ = 104.9130（10）o, V = 1164.7（3） 3, Z = 2, C21H15Pr2N3O15, Mr = 831.18, Dc = 2.370 g·cm-3, F（000） = 800, μ（MoKα） = 4.224 mm-1, the final R = 0.0355 and wR = 0.0731 for 4092 observed reflections with I 2σ（I）. These polymers are constructed from the 3,5-PDA ligand but they exhibit different kinds of metal-organic framework structures. Complexes 1 and 2 are constructed from M-C-O zigzag corner-linked chains （M = Dy and Pr）. In 1, the chains are composed of 8-coordinated DyⅢ centers, while the chains are made up of 8- and 9-coordinated PrIII centers in complex 2. These chains are cross-linked to each other by the pyridine rings of 3,5-PDA ligands, generating three-dimensional architectures. The magnetic behavior of compound 1 has been investigated, showing it exhibits antiferromagnetic interactions among the DyⅢ ions.
