Diverse lanthanide coordination polymers tuned by the flexibility of ligands and the lanthanide contraction effect: syntheses, structures and luminescence
作者:Xiaoyan Zhou、Yanling Guo、Zhaohua Shi、Xueqin Song、Xiaoliang Tang、Xiong Hu、Zhentong Zhu、Pengxuan Li、Weisheng Liu
DOI:10.1039/c1dt10931f
日期:——
same metal-to-ligand molar ratio of 2 : 3. LI, as a bridging ligand, reacts with lanthanide nitrates forming two different types of 2D coordination complexes: herringbone framework [Ln2(NO3)6(LI)3·mC4H8O2]∞ (Ln = La (1), and Pr (2), m = 1, 2)} as type I,; and honeycomb framework [Ln2(NO3)6(LI)3·nCH3OH]∞ (Ln = Nd (3), Eu (4), Tb (5), and Er (6), n = 0 or 3)} as type II, which change according to the
两个新的柔性外-bidentate配体设计并合成,结合不同的主链长度带有两个水杨酰胺臂,即2,2'-(2,2'-氧基双(乙烷-2,1-二基)双(氧基))双(N-苄基苯甲酰胺)(L I)和2,2'-(2,2' -(乙烷-1,2-二基双(氧基))双(乙烷-2,1-二基))双(氧基)双(N-苄基苯甲酰胺)(L II)。这两个与结构相关的配体用作构建具有发光特性的多种镧系元素聚合物的基础。在通过元素分析,TGA分析,X射线粉末衍射和IR光谱表征的两系列硝酸镧系元素络合物中,使用X射线衍射分析法确定了十种新的配位聚合物。所有的配位聚合物表现出相同的金属到配体的摩尔比为2:3。大号我,作为桥连配体,与硝酸镧反应,形成两种不同类型的2D配位化合物:人字形骨架[[Ln 2(NO 3)6(L I)3 · m C 4 H 8 O 2 ] ∞(Ln = La(1)和Pr(2),m = 1,2)}作为类型I,和蜂窝框架[Ln