一例反三棱柱型稀土四核MOF的合成、结构及性质研究

Synthesis,Structure and Property Investigation of a Rare-Earth Metal Clusters Based MOF with Anti-Triangular Prism Structure

由5-咪唑间苯二甲酸(H2L, C11H8O4N2)和稀土硝酸盐Er(NO3)3·5H2O合成了一例具有单晶结构的三维稀土金属有机框架(MOF)材料,并通过元素分析、热重分析和X射线单晶衍射等确定了产物的组成和结构。结构分析表明:该晶体属于正交晶系,空间群为Imma,分别包含两种四核簇次级构筑单元,而其中的镧系金属离子分别呈七配位及八配位构型。

A three-dimensional rare earth metal-organic framework with single crystal structure was successfully synthesized from 5-(1 H-imidazol-1-yl) isophthalic acid(H2L, C11H8O4N2) and Er(NO3)3·H2O, of which the composition and structure were fully investigated by elemental analysis, thermogravimetric analysis and X-ray single crystal diffraction. The structural analysis shows that it crystallizes in the orthogonal system, space group Imma. The complex contains two kinds of secondary building units of quad-core clusters, respectively, of which the lanthanide metal ions are in the 7 or 8 coordination configuration.