摘要
为了研究咪唑二羧酸基配位聚合物的结构和性能,该文采用有机配体2-(p-N-咪唑基)苯基-1H-4,5-咪唑二羧酸(p-IPh H3IDC)与六水合氯化钴通过溶剂热反应制备了一个新的二维配位聚合物[Co(p-IPh HIDC)]n(1)。采用元素分析、红外光谱以及X-射线单晶衍射分析了其分子结构。结果表明:咪唑二羧酸配体呈现出强的配位能力和复杂的配位模式。采用粉末衍射图谱证实了配合物1的纯度。研究了配合物1在空气气氛下的热分解规律。2~300 K内的变温磁化率研究证实,在12.5~300 K的温度范围内,χ-1M^T符合居里外斯定律,居里常数CM=0.416 cm^3K mol^(-1),韦斯常数θ=-22.05 K。χMT曲线的随温度下降而下降的趋势以及负的Weiss值均说明相邻的Co(Ⅱ)离子之间存在着反铁磁偶合作用。
In order to study the structure and properties of imidazole-carboxylate-based coordination polymers,by the reaction of an organic ligand 2-(p-N-imidazol-1-yl)-phenyl-1H-imidazole-4,5-dicarboxylic acid(p-IPhH 3IDC)with CoCl 2·6H 2O,a new two-dimensional Co(Ⅱ)coordination polymer,[Co(p-IPhHIDC)]n(1)is solvothermally prepared.The molecular structure of 1 is characterized by elemental analysis,infrared spectroscopy and X-ray single crystal diffraction.The results indicate that the p-IPhH 3IDC ligand exhibits strong coordination ability and complicated coordination modes.The purity of the complex is confirmed by the powder X-ray diffraction.The thermal behavior of 1 is studied by the thermal analysis in air.The variable temperature susceptibility in 2-300 K confirms that theχ-1 M^T accord with the Curie-Weiss law in the temperature 12.5-300 K.The Curie constant C M and Weiss constantθare equal to 0.416 cm 3 K mol-1 and-22.05 K,respectively.The decreasing trend ofχM T with decreasing temperature and the negative Weiss constant indicate that there is an antiferromagnetic coupling between the adjacent Co(Ⅱ)ions.
作者
刘春丽
冯俊阳
岳志芳
贺贝贝
信志坤
黄秋颖
Liu Chunli;Feng Junyang;Yue Zhifang;He Beibei;Xin Zhikun;Huang Qiuying(Department of Chemical Engineering,Henan Polytechnic Institute,Nanyang 473009,China;School of Medicine and Pharmacy,Henan Vocational College of Applied Technology,Kaifeng 475004,China;Henan Ding Tai Detection Technology Co.,Ltd.,Xinxiang 453006,China)
出处
《南京理工大学学报》
EI
CAS
CSCD
北大核心
2018年第4期491-496,共6页
Journal of Nanjing University of Science and Technology
基金
国家自然科学基金(J1210060)
河南省教育厅基础与前沿技术研究计划项目(16B150002)
河南省高等学校重点科研项目(18A150036)
关键词
Co(Ⅱ)-配位聚合物
咪唑二羧酸
溶剂热合成
单晶X-衍射
反铁磁偶合
晶体结构
热稳定性
磁性
Cd(Ⅱ)-coordination polymer
imidazole dicarboxylate
crystal structure
thermal stability
magnetic property
solvothermal prepration
single crystal X-ray diffraction
antiferromagnetic coupling
