Single-molecule magnet behavior in a mononuclear dysprosium(III) complex with 1-methylimidazole
Single-molecule magnet behavior in a mononuclear dysprosium(III) complex with 1-methylimidazole
复制标题
单核镝 (III) 与 1-甲基咪唑配合物中的单分子磁体行为
DOI：
10.1039/c6ra25038f
复制
发表时间：
2017
期刊：
影响因子：
3.9
通讯作者：
Zhang Xuan
中科院分区：
文献类型：
--
作者：
Yao Binling;Gu Bin;Su Meihui;Li Guoliang;Ma Yue;Li Licun;Wang Qinglun;Cheng Peng;Zhang Xuan
设计了三种与1-甲基咪唑配位的新型单核镧系元素配合物[Ln(hfac)3·(1-MeIm)2]（Ln = Dy(1)、Tb(2)和Ho(3)，hfac =六氟乙酰丙酮化物，1-MeIm = 1-甲基咪唑），并通过单晶X射线衍射、发光和磁测量对其进行了表征。研究表明，所有三种单核配合物的金属离子均采用稍微扭曲的D4d [LnO6N2]配位环境，该环境由两个末端1-甲基咪唑配体和三个双螯合hfac−阴离子形成。在动态磁化率测量中观察到配合物 1 的频率依赖性异相信号，这表明单分子磁性行为。
Three novel mononuclear lanthanide complexes coordinated with 1-methylimidazole [Ln(hfac)3·(1-MeIm)2] (Ln = Dy(1), Tb(2) and Ho(3), hfac = hexafluoroacetylacetonate, 1-MeIm = 1-methylimidazole) have been designed and characterized by single-crystal X-ray diffraction, luminescence and magnetic measurements. Studies indicate that the metal ions of all three mononuclear complexes adopt a slightly distorted D4d [LnO6N2] coordination environment, which is formed by two terminal 1-methylimidazole ligands and three bischelating hfac− anions. Frequency dependent out-of-phase signals were observed for complex 1 in dynamic magnetic susceptibility measurements, which indicates single-molecule magnetic behavior.