Two new coordination polymers of Co(II) with 1,1′-(1,4-butanediyl)bis(benzimidazole)
作者:Jian-Fang Ma、Jing-Fu Liu、Ying-Chun Liu、Yan Xing、Heng-Qing Jia、Yong-Hua Lin
DOI:10.1039/b004787m
日期:——
Two
new compounds, [CoL2(H2O)2](NO3)2·8H2O (1) and [CoL(H2O)2(CH3CO2)2]·H2O (2), were obtained from self-assembly of the
corresponding metal salts with 1,1â²-(1,4-butanediyl)bis(benzimidazole) (L). In 1, each cobalt ion is coordinated to
four nitrogen atoms from four molecules of L, and to two water molecules. Metal ions are bridged by L ligands to form
infinite (4, 4) networks that contain 44-membered rings. The (4, 4) networks of 1 stack in a parallel fashion, resulting
in the formation of large channels in the material. In 2, each cobalt ion is coordinated to two N atoms
from two L molecules, two water molecules and two carboxylate O atoms from two acetate anions. Each L molecule
is coordinated to two cobalt ions, acting as a bridging ligand
as in 1.
The bridged cobalt ions form an infinite zigzag chain structure.
两个新化合物,[CoL2(H2O)2](NO3)2·8H2O (1) 和 [CoL(H2O)2(CH3CO2)2]·H2O (2),是通过相应金属盐与1,1'-(1,4-丁二烯)双(苯咪唑)(L)的自组装获得的。在1中,每个钴离子与四个L分子的四个氮原子和两个水分子配位。金属离子由L配体桥连,形成无限的(4, 4)网络,包含44元环。1的(4, 4)网络以平行方式堆叠,最终形成材料中的大通道。在2中,每个钴离子与两个L分子的两个氮原子、两个水分子和两个来自两个乙酸根阴离子的羧酸氧原子配位。每个L分子与两个钴离子配位,充当桥接配体,如同在1中一样。桥接的钴离子形成无限之字形链结构。