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(英文)

Syntheses and Structures of Lanthanide Metal-organic Frameworks Mainly Assembled by 5-Sulfosalicylic Acid

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)4(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。

Six new lanthanide metal coordination polymers, Ln2（SSA）2（phen）4（H20）2 （Ln=Er（Ⅲ） （1） and Yb（Ⅲ） （2））, [La2（SSA）2（phen）2（H2O）4·（phen）-（n20）l.33]n （3） and [Ln（SSA）（bpdo）0.5（H2O）-（H2O）]n （Ln=Nd（Ⅲ）（4）, Sm（Ⅲ） （5）, Eu（Ⅲ） （6）, SSA=5-sulfosalicylie acid, phen=phenanthroline and bpdo=4,4＇-bipyfidine-N,N＇-dioxide）, were synthesized under hydrothermal conditions and structurally characterized. Compounds 1 and 2 are isostructural with the butterfly-like binuclear 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.