镉配位聚合物的原位水热合成、晶体结构及荧光性质

摘要

以镉盐和吡嗪并[2,3-f][1,10]菲啰啉-2,3二羧酸(H2PPDA)配体为主要原料,在水热条件下合成出2个含镉的配位聚合物.在反应过程中,H2PPDA配体通过原位反应分解为Dpq配体(Dpq=双-[3,2-d∶2',3'-f]喹喔啉)并与金属中心镉配位.配位聚合物1和2具有相同的结构式[Cd(Dpq)Cl2],但呈现出不同的空间结构.X射线单晶衍射分析结果表明它们具有不同的一维链状结构,并通过配体芳香环间强π-π堆积作用构筑成二维超分子骨架.此外,配位聚合物1在室温下展示出良好的固体荧光性质.%Two coordination polymers(CPs)based on cadmium chlorate and the ligand H2PPDA(H2PPDA=pyrazin[2,3-f][1,10] phenanthroline-2,3-dicarboxylic acid)were prepared under hydrothermal conditions.The ligand H2PPDA decomposed into Dpq(Dpq= dipyrido[3,2-d:2',3'-f] quinoxaline)through in situ reaction.CPs 1 and 2 have the same molecular formula [Cd(Dpq)Cl2] but different structures.CPs 1 and 2 are two-dimensional supramolecular networks formed by one-dimensional chains through strong π-π stacking among aromatic ring ligands.Furthermore,CP 1 shows good fluorescence properties in the solid state at room temperature.