混合配体构筑的Zn(Ⅱ)金属有机骨架化合物的合成、结构与荧光性质

Synthesis,Structure and Luminescence Propreties of 3D Interpenetrating Metal-organic Frameworks Built by Zn( Ⅱ) and Mixed Ligands

在水热条件下,利用锌离子与2种有机配体合成出1个结构新颖的金属有机骨架化合物[Zn2(BPDC)(IN)2](H2BPDC=4,4'-联苯二羧酸;HIN=异烟酸),并通过单晶X射线衍射、红外光谱、热重分析和荧光光谱等对该化合物进行了表征.结果表明,该化合物结构中Zn离子与BPDC的羧基形成双核金属次级结构单元[Zn2(—CO2)2(IN)2],相邻次级结构单元通过IN配离子连接形成[Zn2(—CO2)2(IN)2]∞二维层面,相邻的二维层通过BPDC相互连接形成具有三重互穿的简单格子拓扑结构.该化合物表现出良好的荧光性质.

A new metal-organic framework compound,[Zn2（ BPDC）（ IN）2]（ H2 BPDC = biphenyl-4,4’-dicarboxylic acid,HIN = isonicotinic acid）,was synthesized by self-assembly of mixed ligands and Zn（ Ⅱ）under hydrothermal conditions and characterized by means of single-crystal X-ray diffraction,X-ray powder diffraction,thermogravimetric analysis and fluorescence spectra. Single-crystal X-ray diffraction analysis revealed that Zn ions connected to carboxyl of BPDC,forming dual- core metal secondary building units（ SBUs）[Zn2（ —CO2）2（ IN）2],the SBUs connected to the adjacent SBUs through IN to form an unlimited extension two-dimensional network [Zn2（ —CO2）2（ IN）2]∞. The adjacent [Zn2（ —CO2）2（ IN）2]∞layers were interconnected by BPDC ligand to form a simple three-dimensional framework. The three-dimensional framework of the compound has simple cubic lattice topology of threefold interpenetrating. In addition,luminescence properties of [Zn2（ BPDC）（ IN）2]in the solid state were characterized.