九配位Sm^(3+),Eu^(3+)和Gd^(3+)与EDTA配合物的合成及结构研究

Synthesis and Structure Studies of Nine-Coordinate Sm^(3+),Eu^(3+) and Gd^(3+) Complexes with EDTA Ligand

详细报道了Sm3+,Eu3+和Gd3+分别与乙二胺四乙酸(EDTA)配体形成配合物的合成及结构测定。通过单晶X-射线衍射仪和元素分析的测定,确定了这些配合物的结构都是以Sm3+,Eu3+和Gd3+为中心的九配位单帽四方反棱柱体结构,组成分别为Na[Sm(EDTA)(H2O)3]·5H2O,Na[Eu(EDTA)(H2O)3]·4H2O和Na[Gd(EDTA)(H2O)3]·5H2O。

Sm^(3+), Eu^(3+) and Gd^(3+) complexes with ethylenediaminetetraacetic acids (EDTA) were prepared and their composition and structures were determined as Na[Sm(EDTA)(H_2O)_3]·5H_2O, Na[Eu(EDTA)(H_2O)_3]·4H_2O and Na[Gd(EDTA)(H_2O)_3]·5H_2O by single-crystal X-ray diffraction analyses and elemental analyses, respectively. In these complexes, the REN_2O_7 parts form the nine-coordinate structures with mono-capped square antiprism.