混合配体构筑的高稳定性Zn-MOF的合成、结构及荧光性质  

Synthesis,structure and fluorescent property of Zn-MOF with high stability based on mixed ligands

作　　者：翟沙沙 杜锦阁 ZHAI Shasha;DU Jin’ge(School of Basic Medicine,Sanquan Colledge of Xinxiang Medical University,Xinxiang 453003,Henan,China;School of Public Health,Xinxiang Medical University,Xinxiang 453003,Henan,China)

机构地区：[1]新乡医学院三全学院基础医学院,河南新乡453003 [2]新乡医学院公共卫生学院,河南新乡453003

出　　处：《云南大学学报（自然科学版）》2024年第5期918-925,共8页Journal of Yunnan University(Natural Sciences Edition)

基　　金：河南省自然科学基金(222300420263)。

摘　　要：选择芳香多羧酸配体5-(2-乙酰氧基–丙酰氨基)间苯二甲酸(H_(2)L)和辅助配体4,4΄-联吡啶(bpy)与硝酸锌在水热条件下合成了锌(Ⅱ)配位聚合物{[Zn_(2)(L)_(2)(bpy)_(1.5)(H_(2)O)_(3)]·4H_(2)O}_(n).通过元素分析、红外光谱、X射线单晶衍射和粉末衍射表征了其结构.该配合物结晶于三斜晶系,P-1空间群,晶胞参数为a=1.00074(4)nm,b=1.27323(6)nm,c=1.82004(8)nm,α=110.164(4)°,β=100.484(4)°,γ=98.060(4)°,V=2.08820(17)nm^(3);中心离子Zn(Ⅱ)具有扭曲的四面体和三角双锥两种构型;芳香多羧酸配体与Zn(Ⅱ)离子以单齿桥联的方式形成一维链状结构,2条相邻链由bpy连接形成一维梯子状双链结构,在氢键作用下构筑成三维超分子结构.此外,还通过热重分析和固态荧光测试了配合物的热稳定性和荧光性能.结果表明,该配合物具有良好的热稳定性和较强的荧光发射性能.A zinc(Ⅱ)coordination polymer{[Zn_(2)(L)_(2)(bpy)_(1.5)(H_(2)O)_(3)]·4H_(2)O}_(n) was synthesized hydrothermally with 5-(2-acetoxy-propionylamino)-isophthalic acid(H_(2)L),4,4'-bipyridine(bpy)and zinc nitrate.The complex was characterized by elemental analysis,infrared spectroscopy,X-ray single crystal and powder diffraction diffraction.The complex crystallizes in triclinic system,P-1 space group,and the cell parameters are a=1.00074(4)nm,b=1.27323(6)nm,c=1.82004(8)nm,α=110.164(4)°,β=100.484(4)°,γ=98.060(4)°,V=2.08820(17)nm^(3).The central ion Zn(Ⅱ)has two configurations of twisted tetrahedron and triangular bicone.Zn(Ⅱ)ions are bridged with the aromatic polycarboxylate ligands to form a one-dimensional chain,and the two adjacent chains are connected by auxiliary ligand bpy to form a ladder-like double-stranded structure,and finally a three-dimensional supramolecular structure is constructed through hydrogen bonds.Besides,thermal stability and fluorescent property of the complex were tested by thermogravimetric analysis and solid-state fluorescence,respectively.The results show that the complex has good thermal stability and strong fluorescence emission performance.

关 键 词：金属有机框架 芳香多羧酸配体 晶体结构 荧光性能 

分 类 号：O611.4[理学—无机化学] O641[理学—化学] O743