Syntheses and characterizations of two lanthanide(III)-copper(II) coordination polymers constructed by pyridine-2,6-dicarboxylic acid |
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| Authors: | Yue-Peng Cai Cheng-Yong Su Zong-Wan Mao An-Wu Xu |
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| Institution: | a Department of Chemistry, South China Normal University, Shipai Street, Tianhe District, Guangzhou 510631, PR China
b School of Chemistry and Chemical Engineering, Sun Yet-Sen University, Guangzhou 510275, PR China |
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| Abstract: | The hydrothermal reaction of La2O3 and Pr2O3 with pyridine-2,6-dicarboxylic acid (H2pydc), CuO, and H2O with a mole ratio of 1:2:4:300 resulted in the formation of two polymeric Cu(II)-Ln(III) complexes, {Ln4Cu2(pydc)8(H2O)8} · 18H2O]n (Ln = La (1); Pr (2)). 1 and 2 are isomorphous and crystallize in monoclinic space group C2/c. Complexes 1 and 2 have one-dimensional infinite chains with “∞” shape. The 1D chains are linked by the hydrogen bonds and π?π stacking interactions to form layer structures which are further linked by the hydrogen bonds and π?π stacking interactions to form the three-dimensional (3D) structures with nanoscale porosities. Temperature-dependent magnetic susceptibilities and the thermal stabilities of complexes 1 and 2 were studied. |
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| Keywords: | Lanthanide(III)-copper(II) coordination polymers Pyridine-2 6-dicarboxylic acid Crystal structures Temperature-dependent magnetic susceptibilities The thermal stabilities |
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