Five novel SrⅡ-LnⅢ heterometallic coordination polymers based on pyridine-2,6- dicarboxylic acid （H2pda） and imidazole （im）, namely, [LnSr（pda）3（H2O）5]-Him·C2H5OH·3H2O （Ln = Nd （1）; Pr （2））, ...Five novel SrⅡ-LnⅢ heterometallic coordination polymers based on pyridine-2,6- dicarboxylic acid （H2pda） and imidazole （im）, namely, [LnSr（pda）3（H2O）5]-Him·C2H5OH·3H2O （Ln = Nd （1）; Pr （2））, [Ln2Sr（pda）6（H2O）5]-4Him·C2H5OH·5H2O （Ln = Nd （3）; Pr （4））, and [ErSr（pda）3（H2O）4].Him-3.5H2O （5）, have been prepared and structurally characterized. X-ray crystallographic analyses revealed that these complexes display three varieties of l-D chain structures. Several types of hydrogen bonding interactions are found for 1-5, which connect the 1 -D chain structures to form 2-D suoramolecular networks.展开更多
A 4d-4f heterometallic coordination polymer, [AgNd（pydc）2].2H2O （1） （H2pydc=pyridine-3,4-dicarboxylic acid）, was synthesized under hydrothermal conditions, and fimher characterized by elemental analysis, IR, the...A 4d-4f heterometallic coordination polymer, [AgNd（pydc）2].2H2O （1） （H2pydc=pyridine-3,4-dicarboxylic acid）, was synthesized under hydrothermal conditions, and fimher characterized by elemental analysis, IR, thermogravimetric analysis and single-crystal X-ray dif- fraction. Complex 1 featured a three-dimensional （3D） framework containing one-dimensional （1D） channels occupied by free water molecules, which was constructed from 1D inorganic heterometallic chains and linear pydc linkers. To our knowledge, complex 1 represented a rare example of 3D open-framework 4d-4f heterometallic coordination polymer. After removal of the water molecules fi＇om complex 1, the remaining material had high thermal stability. Moreover, the near-infrared luminescent properties of 1 were also investigated in the solid state.展开更多
A new 3D heterometallic coordination polymer, namely [K2Pr2（C2O4）4·H2O]n（1）, has been successfully synthesized under hydrothermal conditions. X-ray single-crystal diffraction determination reveals that 1 crys...A new 3D heterometallic coordination polymer, namely [K2Pr2（C2O4）4·H2O]n（1）, has been successfully synthesized under hydrothermal conditions. X-ray single-crystal diffraction determination reveals that 1 crystallizes in monoclinic system, space group P21/n with a = 12.060（4）, b = 8.493（3）, c = 15.776（5）（A）, β = 93.235（3）°, V = 1613.4（9） A3, Z = 4, Mr = 730.12, Dc = 3.006 Mg/m^3, μ = 6.581 mm-1, F（000） = 1368, the final R = 0.0283 and wR = 0.0866 for 2939 observed reflections with I 〉 2σ（I）. Complex 1 features an unusual 3D heterometallic coordination framework, in which oxalates exhibit three different coordination behaviours. Moreover, powder X-ray diffraction and thermal properties for 1 have also been investigated.展开更多
基金Supported by Hundreds of Talents Program(2005012)of CASNNSFC(21272167 and 21201127)Priority Academic Program Development of Jiangsu Higher Education Institution and Graduate Education Innovation Project in Jiangsu Province(CXZZ12_0808)
文摘Five novel SrⅡ-LnⅢ heterometallic coordination polymers based on pyridine-2,6- dicarboxylic acid （H2pda） and imidazole （im）, namely, [LnSr（pda）3（H2O）5]-Him·C2H5OH·3H2O （Ln = Nd （1）; Pr （2））, [Ln2Sr（pda）6（H2O）5]-4Him·C2H5OH·5H2O （Ln = Nd （3）; Pr （4））, and [ErSr（pda）3（H2O）4].Him-3.5H2O （5）, have been prepared and structurally characterized. X-ray crystallographic analyses revealed that these complexes display three varieties of l-D chain structures. Several types of hydrogen bonding interactions are found for 1-5, which connect the 1 -D chain structures to form 2-D suoramolecular networks.
基金Project supported by National Natural Science Foundation of China (20971004)the Key Project of Chinese Ministry of Education (210102)
文摘A 4d-4f heterometallic coordination polymer, [AgNd（pydc）2].2H2O （1） （H2pydc=pyridine-3,4-dicarboxylic acid）, was synthesized under hydrothermal conditions, and fimher characterized by elemental analysis, IR, thermogravimetric analysis and single-crystal X-ray dif- fraction. Complex 1 featured a three-dimensional （3D） framework containing one-dimensional （1D） channels occupied by free water molecules, which was constructed from 1D inorganic heterometallic chains and linear pydc linkers. To our knowledge, complex 1 represented a rare example of 3D open-framework 4d-4f heterometallic coordination polymer. After removal of the water molecules fi＇om complex 1, the remaining material had high thermal stability. Moreover, the near-infrared luminescent properties of 1 were also investigated in the solid state.
基金supported by the National Natural Science of Foundation of China(No.31270388)
文摘A new 3D heterometallic coordination polymer, namely [K2Pr2（C2O4）4·H2O]n（1）, has been successfully synthesized under hydrothermal conditions. X-ray single-crystal diffraction determination reveals that 1 crystallizes in monoclinic system, space group P21/n with a = 12.060（4）, b = 8.493（3）, c = 15.776（5）（A）, β = 93.235（3）°, V = 1613.4（9） A3, Z = 4, Mr = 730.12, Dc = 3.006 Mg/m^3, μ = 6.581 mm-1, F（000） = 1368, the final R = 0.0283 and wR = 0.0866 for 2939 observed reflections with I 〉 2σ（I）. Complex 1 features an unusual 3D heterometallic coordination framework, in which oxalates exhibit three different coordination behaviours. Moreover, powder X-ray diffraction and thermal properties for 1 have also been investigated.
