摘要
以3-(2-羧苯基)-7-甲基-2-丙基-3H-苯并[d]咪唑-5-羧酸(MZ)为配体,与六水合硫酸锌通过溶剂加热回流后常温静置挥发制备了化合物1(MZ·1.5H_(2)O)和配合物2({[Zn(MZ)_(2)]·H_(2)O}_(n)),并利用元素分析、红外光谱和X-射线单晶衍射技术手段对其结构进行表征。X-射线单晶衍射结果表明,化合物1由一个MZ配体和1.5个水分子组成,通过氢键连接R_(3)~3(10)单元(水分子与羰基间)形成一维锯齿链,进一步通过氢键连接C_(2)~2(4)单元(水分子与咪唑环氮上氢原子间)形成二维结构,之后通过π-π堆积作用有序堆积形成三维网络结构;配合物2由两个独立的分子Zn1和Zn2组成,Zn1和Zn2均由一个Zn(Ⅱ)原子,两个MZ配体分子和一个配位水分子组成,通过MZ配体连接中心Zn(Ⅱ)原子形成了独特的二维结构,进一步通过氢键作用形成三维网络结构。此外,还研究了化合物1、2的热稳定性。
Compound 1(MZ·1.5 H_(2)O)[MZ=3-(2-carboxyphenyl)-7-methyl-2-propyl-3H-benzo[d]imidazole-5-carboxylic acid]and its coordination polymer 2({[Zn(MZ)2]·H_(2)O}n)were successfully prepared by solvent refluxing reaction and then volatilization at room temperature with the MZ ligand and zinc sulfate hexahydrate.The complexes were confirmed by elemental analysis,IR and X-ray single crystal diffraction.The X-ray single crystal diffraction results showed that compound 1 was composed of one MZ ligand and 1.5 water molecules.A one-dimensional(1D)zigzag chain was formed through hydrogen bond connect with the R^(3)_(3)(10)units(formed by hydrogen bond between water molecule and carbonyl oxygen atom).Then a two-dimensional(2D)structure was formed though hydrogen bond between 1D zigzag chain and C^(2)_(2)(4)units(formed by hydrogen bond between water molecule and NH of imidazole ring),and a three-dimensional(3D)network structure was further formed throughπ-πstacking.Complex 2 was composed of two independent molecules Zn1 and Zn2,both of which were composed of one Zn(Ⅱ)atom,two MZ ligand molecules and one coordination water molecule.A unique 2D structure was formed by connecting the central Zn^(Ⅱ)atoms with MZ ligands,and then formed a 3D network structure by hydrogen bonding interaction.In addition,the thermal stability of complexes 1,2 was studied.
作者
赵明霞
熊丽琴
常进
赵治巨
齐传民
ZHAO Ming-xia;XIONG Li-qin;CHANG Jin;ZHAO Zhi-ju;QI Chun-min(Department of Miming Engineering,Shanxi Institute of Technology,Yangquan 045000,China;School of Biomedical Engineering,Shanghai Jiaotong Universit,Shanghai 200025,China;College of Biomedical Engineering,Taiyuan University of Technology,Taiyuan 030000,China;College of Chemical Engineering and Biotechnology,Xingtai University,Xingtai 054001,China;College of Chemistry,Beijing Normal University,Beijing 100875,China)
出处
《化学试剂》
CAS
北大核心
2021年第8期1124-1129,共6页
Chemical Reagents
基金
国家自然科学基金资助项目(21571021)
山西省自然科学基金资助项目(201701D221283)
山西省高等学校科技创新项目(2019L0985)
阳泉市科技重点研发项目(2019G30)
山西省大学生创新创业训练计划项目(2019001,2020001)
河北省高等学校科学研究项目(ZD2018311,ZD2020417)
中央引导地方科技发展基金资助项目(206Z1402G)。
