一维链状镨配位聚合物[Pr(C_5H_4NCOO)_3(H_2O)_)2]_n的合成及晶体结构

Synthesis and Crystal Structure of One-Dimensional Coordinated Polymer [Pr(C_5H_4NCOO)_3(H_2O)_)2]_n

合成了一维配位镨聚合物[Pr(C5H4NCOO)3(H2O)2]n,表征了其晶体结构.结果表明,该配合物属单斜晶系,P21/c空间群;晶胞参数:a=0.970 77(12)nm,b=1.985 2(2)nm,c=1.165 82(14)nm,β=112.023(10)°,V=2.082 8(4)nm3,Z=2;每个镨离子同6个异烟酸配体的氧原子和2个配位水的氧原子配位,形成畸变的反四方棱柱体配位构型.配体异烟酸将相邻的2个镨离子相连,形成一维链状结构.

One-dimensional coordinated polymer [Pr（C5H4NCOO）3（H2O）2]n was synthesized,and its crystal structure was characterized.Results indicate that the coordinated polymer belongs to monoclinic system,space group P21/c,with cell parameters of a = 0.970 77（12） nm,b = 1.985 2（2） nm,c = 1.165 82（14） nm,β = 112.023（10）°,V = 2.082 8（4） nm3,and Z = 2.Pr（Ⅲ） cation is coordinated with six oxygen atoms of six isonicotinic acid ligand and two oxygen atoms of two coordination H2O molecules,forming distorted anti-tetragonal-prismoid.Two adjacent Pr（Ⅲ） ions are bridged by isonicotinic acid ligand,forming one-dimensional chain structure.