由5-磺基水杨酸组装的镧系金属有机骨架配合物的合成及结构

摘要

Six new lanthanide metal coordination polymers, Ln2(SSA)2(phen)4(H2O)2 (Ln=Er(Ⅲ) (1) and Yb(Ⅲ) (2)),[La2(SSA)2(phen)2(H2O)4·(phen)·(H2O)1.33]n(3) and [Ln(SSA)(bpdo)0.5(H2O)·(H2O)]n(Ln=Nd(Ⅲ)(4), Sm(Ⅲ) (5), Eu(Ⅲ)(6), SSA=5-sulfosalicylic acid, phen=phenanthroline and bpdo--4,4'-bipyridine-N,N'-dioxide), were synthesized under hydrothermal conditions and structurally characterized. Compounds 1 and 2 are isostructural with the butterfly-like hiunclear cores, which are further connected by hydrogen bonds and π-π interactions to generate a 3D coordination network. Compound 3 exhibits a 1D infinite ladder-like chain along a-axis, where the hydrogen bonds and π-π stacking interaction play important roles in the formation of the coordination network. Compounds 4-6 possess 3D frameworks with interweaving single-helical chains. In addition, the thermal stabilities and fluorescent properties of the six compounds are studied as well. Compound 3 displays intense blue emission in solid state when excited. CCDC: 612600, 1; 612602, 2; 612601, 3; 653354, 4; 653355, 5; 653356, 6.%在水热条件下,合成了6个新的镧系金属配位聚合物,Ln2(SSA)2(phen)2(H2O)2(Ln=Er(Ⅲ)(1),Yb(Ⅲ)(2)),[La2(SSA)2(phen)2(H2O)4·(phen)·(H2O)1.33]n(3)和[Ln(SSA)(bpdo)0.5(H2O)·(H2O)]n(Ln=Nd(Ⅲ)(4),Sm(Ⅲ)(5),Eu(Ⅲ)(6),SSA=5-磺基水杨酸,phen=邻二氮杂菲,bpdo=4,4'-联吡啶氮氧化物),并测定了它们的结构.化合物1和2都具有蝶状双核中心,这个双核中心进一步通过氢键和π-π相互作用形成三维骨架.化合物3在a方向形成一维梯状链,而氢键和π-π堆积作用在这一结构的形成中起着重要作用.化合物4-6由相互穿插的单螺旋链形成三维骨架结构.此外,对这6个化合物进行了热稳定性和荧光性质的研究.固态化合物3受激下,发射较强的蓝色荧光.