九配位多孔金属有机框架Eu(HCOO)_3配合物的原位合成及其结构分析  

Synthesis and crystal structure of nine-coordinate、porous metal-organic framework complex Eu(HCOO)_3 by situ reaction

作　　者：田婧[1] 薛智[2] 罗华锋[1] 

机构地区：[1]宜宾学院实验与教学资源管理中心,宜宾644000 [2]宜宾学院化学与化工学院,宜宾644000

出　　处：《四川大学学报（自然科学版）》2014年第6期1255-1261,共7页Journal of Sichuan University(Natural Science Edition)

摘　　要：在高温水热条件下,N,N-二甲基甲酰胺(DMF)水解生成甲酸配体,合成九配位的配合物Eu(HCOO)3,配合物通过红外光谱,X-射线单晶衍射和元素分析.结果显示:配合物为三方晶系,R3m空间群.a=1.04972(3)nm,b=1.04972(3)nm,c=0.40011(2)nm,α=90.00°,β=90.00°,γ=120.00°,V=0.38182(2)nm3.配合物中,甲酸根以三齿配位方式桥联,每1个铕(Ⅲ)离子与9个甲酸根的氧原子配位,形成了EuIII O9的九配位三帽三角棱柱体结构,具有高度对称结构.同时对配合物进行了荧光测试,发现配合物具有下转换发光,荧光寿命较长为1.1ms.The nine-coordinate complex Eu（HCOO）3 has been synthesized in the high temperature hydro- thermal conditions, in which the formic acid ligand has been synthesized by the hydrolysis reaction of N, N-dimethyl-Formamide （DMF）. The title complex has been characterized by X-ray single-crystal diffrac- tion, IR and elemental analysis. The results show that the crystal belongs to trigonal system, R3m space group with a=1. 04972（3） nm, b=1. 04972（3） nm, c=0. 40011（2） nm, α=90.00°, β=90.00°, γ =120.00°, V=0. 38182（2） nm^3. In this complex, two Eu（Ⅲ） cations are bridged by formate with tri- dentate coordination mode. Each Eu（Ⅲ） cation is nine-coordinated to nine oxygen atoms of nine formate ligands, which leads the EuⅡO9 part in the nine-coordination structure to be of tricapped trigonal prism with a highly symmetry. The complexes display the characteristic of down-conversion emissions with longer lifetime values of 1.1 ms.

关 键 词：九配位配合物 EuⅢ 晶体结构 水解 荧光 

分 类 号：O614.331[理学—无机化学]