具有金属和自由基电子转移的钴配合物晶体结构及其磁性研究  

Crystal Structure and Magnetic Properties of Cobalt Complex with Electron Transfer from Metal to Imino Nitroxide Radical Ligand

作　　者：梅雪兰 李倩 MEI Xue-lan;LI Qian(School of Materials Science and Chemical Engineering,Bengbu University,Bengbu,233030,Anhui)

机构地区：[1]蚌埠学院材料与化学工程学院,安徽蚌埠233030

出　　处：《蚌埠学院学报》2024年第5期7-10,共4页Journal of Bengbu University

基　　金：蚌埠学院产学研项目(00013540,00010086);蚌埠学院校级科研团队项目(BBXYKYTDxjZD03)。

摘　　要：合成了一例新的氮氧自由基-过渡金属配合物[Co(imOH-2Py)(imO^(-)-2Py)(N_(3))_(2)]·(CH_(3)OH)(H_(2)O)(其中imOH-2Py=2-(2’-吡啶基)-4,4,5,5-四甲基咪唑啉-1-氧基自由基),并对其结构和性质进行了元素分析、X-射线单晶衍射和磁化率的表征。结果表明:配合物属于三斜晶系,P1空间群,晶胞参数得以确定。配合物由一个[Co(imOH-2Py)(imO^(-)-2Py)(N_(3))_(2)]单元,一个甲醇分子和一个水分子构成,其中每个Co(Ⅲ)离子采取六配位的变形八面体构型,与两个imOH-2Py自由基上的亚胺基氮和吡啶环上的氮原子及两个线性的叠氮阴离子上的氮原子配位。磁性测试表明该配合物具有抗磁性。A new nitronyl nitroxide radical-transition metal complex[Co(imOH-2Py)(imO^(-)-2Py)(N_(3))_(2)](CH_(3)OH)(H_(2)O)(imOH-2Py=2-(2’-pyridyl)-4,4,5,5-tetramethylimidazoline-1-oxyl)was synthesized.The structure and properties of the complex were characterized by elemental analysis,single crystal X-ray diffraction,and variable temperature magnetic susceptibility measurements.The results showed that the complex belongs to the triclinic system,space group P1,with the sure cell parameter.X-ray diffraction analysis showed that the complex consists of one[Co(imOH-2Py)(imO^(-)-2Py)(N_(3))_(2)]unit one methanol molecule and one water molecule,in which the Co(III)ion was six-coordinated in a distorted octahedral coordination geometry.Each Co(III)ion was coordinated by two imOH-2Py radicals and two linear azide anions.Magnetic susceptibility studies revealed that the complex was diamagnetic.

关 键 词：氮氧自由基配合物 抗磁金属Co(Ⅲ) 晶体结构 磁性 

分 类 号：O614[理学—无机化学]