基于手性芳香多羧酸配体构筑的Cd(Ⅱ)手性配合物的合成、晶体结构及荧光性质

Synthesis,crystal structure and fluorescence property of Cd(Ⅱ)chiral coordination polymer based on an chiral aromatic polycarboxylate ligand

选择手性化合物(S)-3,5-二(1-羧乙氧基甲基)-苯甲酸三钠盐(Na_3L)为芳香多羧酸有机配体,以1,2-二吡啶乙烷(bpa)为含氮辅助配体与醋酸镉在水热条件下反应得到一个手性配位聚合物{Cd_2(L)(bpa)_2(CH_3COO)}_n(1).利用单晶X-射线衍射分析、元素分析和红外光谱考察了配合物1的晶体结构.配合物1中双核镉金属构筑单元通过羧酸配体L3-连接形成了管状结构,相邻的管状结构之间通过辅助配体bpa连接在一起形成二维层状结构,最后相邻的层状结构通过C-H…π弱相互作用力构筑成三维超分子结构.此外还对配合物1的晶体纯度、热稳定性和荧光性能进行了分析.

A chiral coordination polymer based on(S)-3,5-(di-1-carboxyethoxymethyl)-benzoate(Na 3L)and ancillary nitrogen ligand(bpa=1,2-dipyridine ethane),namely{Cd 2(L)(bpa)2(CH 3COO)}n(1),has been synthesized and characterized by single-crystal X-ray diffraction,elemental analysis and infrared spectrum.In the structure of complex 1,binuclear cadmium building units are connected by L 3-ligands to form a tubular structure,and the adjacent tubular structures are associated together by the auxiliary ligand bpa to form two-dimensional layers,which are connected together through the weak force C-H…πto construct a three-dimensional supramolecular structure.Besides,the purity of crystals,thermal stability analysis as well as luminescence have also been investigated.