基于5,5′-亚甲基二间苯二甲酸及1,2-双(咪唑基-1-甲基)苯的Zn~(2+)、Co~(2+)配位聚合物的合成及晶体结构

水热条件下,合成了2个三维配位聚合物{Zn4(L)2(o-bix)2]·2H2O}n(1),{Co4(L)2(o-bix)2]·2H2O}n(2)(H4L=5,5′-亚甲基二间苯二甲酸,o-bix=1,2-双(咪唑基-1-甲基)苯),并通过红外、热重和X-射线单晶衍射进行了表征。X-射线衍射结果表明这2个化合物具有相似的结构。在1个不对称单元中,化合物包含2个不同配位环境的金属离子,1个L4-配体,1个o-bix分子以及1个游离的溶剂水分子。中心金属离子分别采用畸变的四面体和四方锥构型,形成两类双核单元,然后通过全部脱质子的L4-形成3D孔洞结构,o-bix配体通过连接两类双核金属原子填充于孔洞之中,形成3D紧密堆积结构。对化合物的红外和热重性质进行了表征。

Syntheses and Crystal Structures of Zn2+ and Co2+ Coordination Polymers Based on Methylenediisophthalic Acid and 1,2-Bis(imidazol-1-ylmethyl)benzene) Ligands

Under hydrothermal conditions, two 3D coordination complexes {Zn₄(L)₂(o-bix)₂]·2H₂O}_n (1), {Co4(L)₂(o-bix)₂]·2H₂O}_n(2)(H₄L=methylenediisophthalic acid, o-bix=1,2-bis(imidazol-1-ylmethyl)benzene)) have been synthesized and characterized by IR, TGand single crystal X-ray diffraction analysis. The result of X-ray diffraction analysis shows that two complexes share similar structural motifs. There are two crystallographic independent metal ions, one L^4- ligand, one o-bix ligand and one free water molecule in the asymmetric unit. Two kinds of binuclear metal clusters are joined together through deprotonated L^4- ligand, giving rise to 3D porous framework, then o-bix ligands coordinated to two kinds of binuclear metal units to be 3D condensed structure. Moreover, the characterizations of IR spectra and TGproperties were carried out. CCDC: 976916, 1; 976917, 2.