基于氨三乙酸和钕的三维金属有机框架物的合成及结构表征(英文)

利用水热法合成了三维网状金属有机框架物Nd(NTA)(H2O)]∞其中NTA指氨三乙酸根(nitrilotriacetate anion)];采用元素分析仪、红外光谱仪和X射线单晶衍射仪等分析了产物的组成以及化学结构和晶体结构。结果表明,目标配合物中的NTA为四齿配体,Nd(III)原子采取八配位模式(NdN1O7)形成十二面体立体结构。与此同时,Nd(NTA)(H2O)]∞以菱形四面体Nd8C14O28为构筑块,通过桥连羧基和分子间氢键组装成为三维超分子网络结构。

Synthesis and characterization of a metal-organic framework of grid networks based on nitrilotriacetic acid and neodymium

A three dimensional （3D） metal organic framework of rhombic tetrahedral grid net- work, coordination polymer ENd（NTA） （H2O）2＋ （NTA = nitrilotriacetate anion）, was pre- pared by a hydrothermal method. The elemental composition as well as chemical structure and crystal structure of as synthesized product were analyzed by elemental analysis, infrared spec- trometry, and single crystal X-ray diffraction. It was found that the NTA ligand in the target coordination compound acts as a tetradentate metal linker, while the Nd（III） center in the com- plex adopts an eight-coordinated mode with NdN1 07 donors to construct a distorted triangular dodecahedral configuration. In the meantime, based on the building block of octanuclear homo- metallic NdaC14 028 rhombic tetrahedral unit, the neodymium coordination polymer is further assembled into highly ordered 3D architecture through O--C--O linkers and intermolecular hy- drogen bonds.