Crystal structures and properties of four coordination polymers based on a new asymmetric ligand: Tuning structure/dimensionality by various organic solvents
作者:Bin Li、Qing-Qing Yan、Guo-Ping Yong
DOI:10.1016/j.ica.2019.119403
日期:2020.4
Abstract An asymmetric ligand, 4,4'-([2,3'-bipyridine]-4,6-diyl)dibenzoic acid (H2L) was successfully used to construct four new coordination polymers, namely [M(HL)2]n (M = Cd(1), Co(2), Zn(3)) and [Ni(L)(H2O)2]n·H2O (4), which were solvothermally synthesized and structurally characterized. In coordination polymers 1−4, two ligands bridge two metal centres through carboxylate oxygen atoms and pyridyl
摘要成功地使用不对称配体4,4'-([[2,3'-联吡啶] -4,6-二基)二苯甲酸(H2L)来构建四种新的配位聚合物,即[M(HL)2] n (M = Cd(1),Co(2),Zn(3))和[Ni(L)(H2O)2] n·H2O(4),通过溶剂热合成并进行结构表征。在配位聚合物1-4中,两个配体通过羧酸氧原子和吡啶氮原子桥接两个金属中心,形成菱形网格图案。其中,每个菱形网格通过金属节点连接到相邻的菱形网格,以构建具有部分去质子化的2-连接的HL-配体的1-3的螺旋状一维链,而完全去质子化的3-连接的L2-配体构成了菱形的网格。 4的2D网络。1-4的各种结构/维数基本上源于有机溶剂的类型,因为双极性DMF溶剂会导致4中的L2-完全去质子化,相反,极性NMP和MeCN仅会导致1-3中配体的部分去质子化。有趣的是,与H2L配体相比,增强的发光出现在1和3中,而2和4则显示出反铁磁行为。此外,