含羟基基团取代的氮氧自由基构筑的三个双核稀土化合物的结构及磁性表征  

Three Binuclear Lanthanide Complexes Constructed from Nitronyl Nitroxide Radical Ligands Containing Phenol Groups:Structure and Magnetic Properties

作　　者：梅雪兰 郭简妮 杜敏杰 杨培培[4] 李倩 李宗群 瞿安荣 MEI Xue‑Lan;GUO Jian‑Ni;DU Min‑Jie;YANG Pei‑Pei;LI Qian;LI Zong‑Qun;QU An‑Rong(College of Materials Science and Chemical Engineering,Bengbu University,Bengbu,Anhui 233030,China;Department of Chemistry,Key Laboratory of Advanced Energy Materials Chemistry,College of Chemistry,Nankai University,Tianjin 300071,China;Military Representative Bureau of Nanjing of the PLA Army,Bengbu,Anhui 233030,China;College of Chemistry and Materials Science,Huaibei Normal University,Huaibei,Anhui 235000,China)

机构地区：[1]蚌埠学院材料与化学工程学院,蚌埠233030 [2]南开大学化学学院化学系,先进能源材料化学重点实验室,天津300071 [3]南京军代局驻蚌埠地区军代室,蚌埠233030 [4]淮北师范大学化学与材料科学学院,淮北235000

出　　处：《无机化学学报》2021年第4期592-600,共9页Chinese Journal of Inorganic Chemistry

基　　金：安徽高校自然科学基金(No.KJ2017A571);蚌埠学院自然科学基金(No.2017ZR01zd);蚌埠学院产学研项目(精密塑料零件成型工艺参数优化);大学生创新创业项目(No.201811305146)资助

摘　　要：以三氟乙酰丙酮(tfac)为共配体的稀土配合物分别与5-溴-2-羟基苯取代的自由基配体和5-硝基-2-羟基苯取代的自由基配体进行反应,合成3个稀土-自由基配合物[Ln2(tfac)4(NIT-5Br-2PhO)2](Ln=Gd (1),Dy (2))和[Dy2(tfac)4(NIT-5NO2-2PhO)2](3)(NIT-5Br-2PhOH=2-(2′-hydroxy-5′-bromophenyl)-4,4,5,5-tetramethylimidazoline-1-oxyl-3-oxide,NIT-5NO2-2PhOH=2-(2′-hydroxy-5′-nitrophenyl)-4,4,5,5-tetra-methylimidazoline-1-oxyl-3-oxide)。单晶结构分析表明这3个化合物中的稀土离子均通过自由基配体上的羟基氧基团连接为双核的结构。配合物1的直流磁化率表征揭示了Gd(Ⅲ)离子间的反铁磁耦合对其磁行为起主要作用。The nitronyl nitroxide radicals NIT-5Br-2PhOH(2-(2′-hydroxy-5′-bromophenyl)-4,4,5,5-tetramethylimidazoline-1-oxyl-3-oxide) and NIT-5NO2-2 PhOH(2-(2′-hydroxy-5′-nitrophenyl)-4,4,5,5-tetramethylimidazoline-1-oxyl-3-oxide) were selected as ligands to react with Ln(tfac)3·2H2O(tfac=trifluoroacetylacetonate) to produce three new lanthanide-radical complexes [Ln(tfac)2(NIT-5Br-2PhO)]2(Ln=Gd(1), Dy(2)) and [Dy(tfac)2(NIT-5NO2-2 PhO)]2(3).Single crystal X-ray crystallographic analysis reveals that all three complexes possess binuclear structure in which two lanthanide ions are connected through the hydroxy groups of the radicals. DC magnetic susceptibilities of Gd complex reveal that the antiferromagnetic coupling between the Gd(Ⅲ) centers plays a major role for the magnetic behavior. CCDC: 1981623,1;1981622,2;2021836,3.

关 键 词：稀土配合物 氮氧自由基 双核结构 磁行为 

分 类 号：O614.339[理学—无机化学] O614.342[理学—化学]