Synthesis,structure,and magnetic property of a cobalt(Ⅱ)complex based on pyridyl⁃substituted imino nitroxide radical  

基于吡啶取代的单臂氮氧自由基的钴Ⅱ配合物的合成、结构和磁性质

作　　者：WANG Xiaoling ZHANG Hongwu LIU Daofu 王晓玲;张洪武;刘道富(淮南师范学院化学与材料工程学院,淮南232038)

机构地区：[1]School of Chemistry and Materials Engineering,Huainan Normal University,Huainan,Anhui 232038,China

出　　处：《无机化学学报》2025年第2期407-412,共6页Chinese Journal of Inorganic Chemistry

基　　金：淮南师范学院科研创新团队建设计划资助。

摘　　要：A new cobalt(Ⅱ)-radical complex:[Co(im4-py)_(2)(PNB)_(2)](im4-py=2-(4'-pyridyl)-4,4,5,5-tetramethylimidazole-1-oxyl,HPNB=p-nitrobenzoic acid)has been synthesized and characterized by X-ray diffraction analysis,elemental analysis,IR,and magnetic properties.X-ray diffraction analysis shows that the complex exists as mononuclear molecules and Co(Ⅱ)ion is four-coordinated with two radicals and two PNB-ligands.The magnetic susceptibility study indicates the complex exhibits weak ferromagnetic interactions between cobalt(Ⅱ)and im4-py radical.The magnetic property is explained by the magnetic and structure exchange mechanism.CCDC:976028.用对硝基苯甲酸(HPNB)和一种单臂氮氧自由基反应,合成了一种新的配合物[Co(im4-py)_(2)(PNB)_(2)](im4-py=2-(4′-吡啶基)-4,4,5,5-四甲基咪唑啉-1-氧基自由基),并对其进行X射线衍射、元素分析、红外和磁性质等表征。晶体结构分析表明,配合物中每个CoⅡ处于四配位的变形四面体构型中,分别与2个im4-py和2个PNB-配位。磁性质研究表明,配合物中CoⅡ离子和自由基之间存在着弱的铁磁相互作用。通过磁构交换机理对磁性质进行了解释。

关 键 词：Co(Ⅱ)complex imino nitroxide radical crystal structure magnetic property 

分 类 号：O614.812[理学—无机化学]