Field-induced Slow Magnetic Relaxation Behavior in a Mononuclear Dy(III) Complex based on 8-Hydroxyquinoline Derivate Ligand
Field-induced Slow Magnetic Relaxation Behavior in a Mononuclear Dy(III) Complex based on 8-Hydroxyquinoline Derivate Ligand
复制标题
基于 8-羟基喹啉衍生物配体的单核 Dy(III) 配合物中场诱导的慢磁弛豫行为
DOI：
10.1002/zaac.201800310
复制
发表时间：
2018
期刊：
影响因子：
--
通讯作者：
Xing-Cai Huang
中科院分区：
文献类型：
--
作者：
Cheng-Long Ji;Yu-Xuan Jiang;Jia-Chen Zhang;Zi-Yi Qi;Jiao-Jiao Kong;Xing-Cai Huang
合成了一种基于8-羟基喹啉衍生物配体[quinbeyz = 8-羟基喹啉-2-甲醛-（苯甲酰基）肼]的单核Dy III化合物[Dy（quinbeyz）（NO3）2（DMF）]（1），并通过X射线单晶衍射对其进行了表征。晶体结构表明，化合物的DyIII离子是九配位的，在一个扭曲的盖帽正方形反棱柱排列与伪C4 v对称性。直流磁化率表明化合物1表现出易轴向磁各向异性。通过对磁性数据的拟合得到了晶体场参数（CFPs），并利用静电模型计算了化合物1中心DyIII原子的磁易轴取向.这将有助于进一步理解DyIII的磁各向异性和磁结构关系。交流（ac）磁性测量表明化合物1表现出场致缓慢磁弛豫行为。这些结果表明，通过使用8-羟基喹啉衍生物配体可以有效地构建具有伪C4 v对称性的单核镧系单分子磁体（SMM）。
A mononuclear DyIIIcompound [Dy(quinbeyz)(NO3)2(DMF)] (1) based on 8‐hydroxyquinoline derivative ligand [quinbeyz = 8‐hydroxyquinoline‐2‐carboxyaldehyde‐(benzoyl)hydrazine] was synthesized and characterized by single‐crystal X‐ray diffraction analysis. The crystal structure showed that the DyIIIion of the compound is nine‐coordinate in a distorted capped square antiprism arrangement with pseudo‐C4vsymmetry. Direct‐current (dc) magnetic susceptibilities revealed that compound1showed easy axial magnetic anisotropy. The crystal field parameters (CFPs) were obtained from fitting of the magnetic data, and the orientation of the magnetic easy axis of the central DyIIIatom for compound1was calculated by the electrostatic model. It can be helpful further to understand the magnetic anisotropy of DyIIIand the magneto‐structural relationship. Alternating current (ac) magnetic measurements demonstrated that compound1exhibited field‐induced slow magnetic relaxation behavior. These results demonstrated that an approach to achieve mononuclear lanthanide single‐molecule magnets (SMMs) with pseudo‐C4vsymmetry could be effectively constructed by using 8‐hydroxyquinoline derivative ligand.