基于一类双官能团有机配体的稀土金属中心配位聚合物的合成、结构及性质研究

Syntheses, structures and characterizations of rare earth metal center coordination polymers based on bifunctional ligands

摘要:

利用溶剂热合成法/溶剂缓慢挥发法，以一类双官能团有机配体（5-四氮唑基-间苯二甲酸(H3TZI)，(5-(4-(1H-四唑基)苯基)间苯二甲酸(H3TZPI))为连接器分别与Dy3+/La3+稀土金属离子配位，得到化合物[Dy(TZI)(H2O)4]•4H2O (1), [La(HTZPI)(HC2O4)(H2O)3]•H2C2O4 (2). 单晶X-射线衍射分析表明该化合物1与化合物2分别为包含双核基本单元的一维双链和二维层状结构. 结构分析发现该类双官能团有机配体与稀土金属中心的配位时四氮唑基团皆未参与配位. 同时，对化合物的热稳定性和荧光性质进行了研究.

Abstract:

The coordination polymers ([Dy(TZI)(H2O)4]•4H2O (1) and [La(HTZPI)(HC2O4)(H2O)3]•H2C2O4 (2)) have been synthesized by involving the bifunctional ligands (5-tetrazolylisophthalic acid (H3TZI) and 5-(4-(1H-tetrazolyl) phen) isophthalic acid (H3TZPI)) as linkers coordinating with rare earth metal ions (Dy3+/La3+). The using synthesis methods are hased on solvothermal synthesis and slow solvent evaporation. Crystal structures are characterized by X-ray single crystal diffraction, which show that the two compounds correspond to one-dimensional double-stranded chain and two-dimensional layer structure, respectively. It is notable that for this bifunctional ligand the tetrazolyl group is invalid when it coordinates with rare earth metal centers. Meanwhile, the thermal stabilities and the luminescent properties of them are investigated.