稀土配位聚合物[Pr(2,5-pdc)(OH)(H_2O)_2]·H_2O的合成、结构及热稳定性

Crystal Structure and Thermal Stability of a New Lanthanide Coordination Polymer [Pr(2,5-pdc)(OH)(H_2O)_2]·H_2O

采用水热方法合成一种新型的稀土有机配合物[Pr(2,5-pdc)(OH)(H2O)2].H2O,通过元素分析、红外光谱及X射线衍射方法对该配合物进行结构表征.结构分析表明:标题配合物属于单斜晶系;P21/c空间群;晶胞参数a=0.9350(4)nm,b=1.6158(6)nm,c=0.8309(3)nm,α=γ=90.000°,β=94.078(7)°,V=1.2521(9)nm3,Z=4.配合物中镨离子通过μ2-OH桥连接形成双核构筑单元,进一步通过2,5-pdc中的羧基氧原子连接形成三维结构.

A new lanthanide-organic framework [Pr（2,5-pdc）（OH）（H2O）2]·H2O was synthesized under hydrothermal conditions and characterized by elemental analysis,IR spectrometry and single crystal X-ray diffraction. X-ray diffraction analyses reveal that the title complex was crystallized in a monoclinic space group P21/c,with a=0.935 0（4） nm,b=1.615 8（6） nm,c=0.830 9（3） nm,α=γ=90.000°,β=94.078（7）°,V=1.252 1（9） nm3,Z=4. The complex possesses binuclear units constructed via OH-bridging,and the binuclear units are further connected by carboxyl oxygen atoms of 2,5-pdc ligands to form a 3D framework.