5-氨基间苯二甲酸构筑的镉配位聚合物的合成、晶体结构及其荧光性质研究

采用普通溶液法合成配位聚合物{Cd(Ⅱ)(NH_2-BDC)(H_2O)_3]}_n(NH_2-BDC=5-氨基间苯二甲酸),通过X-射线单晶衍射分析、红外光谱分析、热重分析以及荧光光谱分析等方法,对该配合物的结构进行测定和表征.分析结果表明,该配合物属正交晶系,空间群Pccn,晶体学参数a=0.739 9(5)nm,b=1.831 4(1)nm,c=1.510 8(1)nm,V=2.047 1(2)nm~3,Dc=2.243g/cm~3,μ(MoKα)=2.160(2),F(000)=1 360,S=1.069.每个镉离子周围有6个O原子与之配位,形成一个畸变的八面体.配位聚合物为一维链状结构,链与链之间通过芳香环的π-π堆积形成二维平面结构,而面与面之间通过分子间氢键作用形成三维网状结构.标题配合物能发荧光,最大发射波长是491nm,在发光材料方面有潜在的应用价值.

Synthesis,crystal structure and fluorescence properties of cadmium coordination polymers constructed by 5-aminoisophthalic acid

Cadmium of coordination polymer { Cd (Ⅱ) (NH2-BDC) (H2O) 3] } n (N H2-BDC =5-aminoisophthalic acid) has been synthesized by common solution method and property characterized by single-crystal X-ray diffraction analysis,infrared spectrometry analysis,fluorescent analysis and TG analysis.The compound belongs to orthogonal systems,space group Pccn.The unit cell parameters are:a=0.739 9(5)nm,b=1.831 4(1)nm,c=1.510 8(1)nm,V=2.047 1(2)nm3,Dc=2.243 g/cm3,μ(MoKa)=2.160(2),F(000)=1 360,S=1.061(3).The complex ofcadmium ions surrounded by six oxygen atoms,forming adistorted octahedral coordination geometry.The metal coordination polymer is a one-dimensional chain structure,through intermolecular hydrogen bonds form three-dimensional framework.Cadmium(Ⅱ) coordination polymer has well luminous performance.The metal coordination polymer {Cd(Ⅱ)(NH2-BDC)(H2O)3] }n has potential application value which is regarded as a promising candidate for luminous material.