基于3-吡唑-5吡啶-1,2,4-三唑和均苯四甲酸构筑的两个同构配位聚合物的晶体结构和磁性
Crystal Structures and Magnetic Properties of Two Isomorphic Frameworks Based on 3-(1H-pyrazol-4-yl)-5-(pyridin-2-yl)-1,2,4-triazole and 1,2,4,5-Benzenetetracarboxylic Acid
作者单位E-mail
王玉芳 洛阳师范学院化学化工学院, 功能导向多孔材料重点实验室, 洛阳 471934 wangyf78@163.com 
太军慧 南阳师范学院化学与制药工程学院, 南阳 473000  
颜小伟 洛阳师范学院化学化工学院, 功能导向多孔材料重点实验室, 洛阳 471934  
赵梦云 洛阳师范学院化学化工学院, 功能导向多孔材料重点实验室, 洛阳 471934  
王利亚 南阳师范学院化学与制药工程学院, 南阳 473000  
摘要: 以3-吡唑-5吡啶-1,2,4-三唑(H2L)和均苯四甲酸(H4btec)为配体合成了2个新的同构配位聚合物[M(btec)0.5(H2L)]n(M=Co(II)(1),Cu(II)(2)),通过X射线单晶衍射、元素分析、红外光谱等进行了结构表征。晶体结构分析表明配合物12是同构的,都属于正交晶系,空间群为Pbca。2个配位聚合物都是二维结构,通过N…H…O氢键形成三维超分子框架结构。此外对上述配合物进行了磁性研究,结果表明配合物1内通过羧基桥连的金属钴离子之间是弱的铁磁相互作用;配合物2中存在典型的順磁行为。
关键词: 同构  晶体结构  磁性
基金项目: 国家自然科学基金(No.21671114)资助项目。
Abstract: Two new isomorphic coordination polymers,[M(btec)0.5(H2L)]n (M=Co(Ⅱ) (1), Cu(Ⅱ) (2); H4btec=1,2,4,5-benzenetetracarboxylic acid; H2L=3-(1H-pyrazol-4-yl)-5-(pyridin-2-yl)-1,2,4-triazole), have been synthesized under hydrothermal conditions. Compounds 1 and 2 were structurally characterized by elemental analysis, single crystal X-ray diffraction analysis, infrared spectroscopy and powder X-ray diffraction analysis. Single crystal X-ray diffraction measurement reveals that compounds 1 and 2 are isostructural structure and all crystallize in the orthorhombic system, space group Pbca. Compounds 1 and 2 have same 2D structure, which are connected by N…H…O hydrogen bonds to generate 3D frameworks. In addition, magnetic studies indicate that 1 show weak ferromagnetic exchange through carboxylate bridges between metal ions, and there is typical paramagnetic behavior in 2.
Keywords: isomorphic  crystal structure  magnetic property
投稿时间:2017-10-19 修订日期:2018-03-27
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王玉芳,太军慧,颜小伟,赵梦云,王利亚.基于3-吡唑-5吡啶-1,2,4-三唑和均苯四甲酸构筑的两个同构配位聚合物的晶体结构和磁性[J].无机化学学报,2018,34(6):1121-1126.
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