稀土(铕,钕)-2,6-吡啶二甲酸配合物的合成、结构及其性质  

Synthesis,Structures and Properties of Rare Earth(Eu,Nd)Complexes with Pyridine-2,6-Dicarboxylic Acid

作　　者：宋翰林 吕雪川 张晓帆 张雅琦 李成龙 高肖汉 Song Hanlin;LüXuechuan;Zhang Xiaofan;Zhang Yaqi;Li Chenglong;Gao Xiaohan(School of Petrochemical Engineering,Liaoning Petrochemical University,Fushun Liaoning 113001,China)

机构地区：[1]辽宁石油化工大学石油化工学院,辽宁抚顺113001

出　　处：《石油化工高等学校学报》2023年第1期58-65,共8页Journal of Petrochemical Universities

基　　金：国家自然科学基金项目(21003069、2113078)。

摘　　要：采用水热合成法,制备了铕/钕-2,6-吡啶二甲酸配合物[Ln(2,6-dipic)(2,6-Hdipic)(H_(2)O)_(2)]·4H_(2)O(Ln代表Eu及Nd),并通过单晶结构测定、磁化率测试、热重分析及差示扫描量热分析,研究了稀土吡啶羧酸类配合物的结构、磁性、热力学性质。结果表明,2个配合物为异质同构体,属于单斜晶系,P2_(1)/c空间群;晶体中的2,6-吡啶二甲酸采用了两种不同的配位模式;配合物呈现反铁磁性,有明显的轨道耦合作用;配合物具有较高的热稳定性。Rare earth complexes of Eu^(3+)and Nd^(3+)with pyridine dicarboxylate[Ln(2,6-dipic)(2,6-Hdipic)(H_(2)O)_(2)]•4H_(2)O(Ln:Eu,Nd)were synthesized by hydrothermal method.The structure,magnetism and thermodynamic properties of the complexes were studied by the means of single crystal X-ray diffraction measurement,magnetic test,thermogravimetric analysis and differential scanning calorimetry analysis.The results show that two complexes are isostructural crystallizing in the monoclinic system of space group P2_(1)/c.There are two different coordination modes for pyridine-2,6-dicarboxylic acid in the crystals.The complexes exhibit antiferromagnetism with obvious orbital coupling effect.The prepared complexes have good thermal stability.

关 键 词：稀土 2 6-吡啶二甲酸 配合物 磁性 热力学性质 单晶 

分 类 号：TQ133.3[化学工程—无机化工] O641.4[理学—物理化学]