Metallogrid Single-Molecule Magnet: Solvent-Induced Nuclearity Transformation and Magnetic Hysteresis at 16 K

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• 作者：Wei Huang ; Fu-Xing Shen ; Shu-Qi Wu ; Li Liu ; Dayu Wu ; Zhe Zheng ; Jun Xu ; Ming Zhang ; Xing-Cai Huang ; Jun Jiang ; Feifei Pan ; Yao Li ; Kun Zhu ; Osamu Sato
• 刊名：Inorganic Chemistry
• 出版年：2016
• 出版时间：June 6, 2016
• 年：2016
• 卷：55
• 期：11
• 页码：5476-5484
• 全文大小：668K
• 年卷期：0
• ISSN：1520-510X

文摘

Structural assembly and reversible transformation between a metallogrid Dy₄ SMM (2) and its fragment Dy₂ (1) were established in the different solvent media. The zero-field magnetization relaxation was slowed for dysprosium metallogrid (2) with relaxation barrier of U_eff = 61.3 K when compared to Dy₂ (1). Both magnetic dilution and application of a moderate magnetic field suppress ground-state quantum tunneling of magnetization and result in an enhanced U_eff of 119.9 and 96.7 K for 2, respectively. Interestingly, the lanthanide metallogrid complex (2) exhibits magnetic hysteresis loop even up to 16 K at a given field sweep rate of 500 Oe/s.