Fine-Tuning of the Coordination Environment To Regulate the Magnetic Behavior in Solvent/Anion-Dependent Dy<sup>III</sup> Compounds: Synthesis, Structure, Magnetism, and Ab Initio Calculations
作者:Lin Sun、Sheng Zhang、Chengfang Qiao、Sanping Chen、Bing Yin、Wenyuan Wang、Qing Wei、Gang Xie、Shengli Gao
DOI:10.1021/acs.inorgchem.6b01803
日期:2016.10.17
thermodynamically monitored by isothermal titration calorimetry. Magnetic data analysis reveals that 2 shows SMM behavior under a zero direct-current (dc) field, whereas 1 and 3 exhibit distinct slow magnetic relaxation processes upon a 1200 Oe dc field. To deeply understand the different magnetic behaviors, the magnetic anisotropy of 1–3 has been systematically studied by ab initio calculations, which is consistent
了解和阐明解决方案系统中基于Dy III的单分子磁体(SMM)的自组装机制至关重要。本文中,通过阴离子和溶剂的微调,我们制备了三种九配位单核化合物[Dy(2,3'-pcad)(NO 3)2(CH 3 OH)2 ](1),[Dy (2,3'-Hpcad)2(H 2 O)3 ]·3Cl·5H 2 O(2)和[Dy(2,3'-pcad)(NO 3)(H 2 O)4 ]·NO 3 ·H 2 O(3)[2,3′-Hpcad = N 3-(2-吡啶基)-3-吡啶甲酰胺基]。形成的用于反应1 - 3是原位通过等温滴定量热法热力学监测。磁数据分析表明,2显示在零直流(dc)场下的SMM行为,而1和3显示在1200 Oe dc场下明显的慢磁弛豫过程。为了深入了解不同的磁行为,已经通过从头算计算系统地研究了1 – 3的磁各向异性,这与实验观察结果是一致的。此外,半导体行为1 –通过紫外可见光谱的实验测量已经研究了3种。