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曲的二胺单分子磁铁的隔离

Jack Emerson-King¹, Gemma K Gransbury¹, George F S Whitehead¹

¹Department of Chemistry, The University of Manchester, Oxford Road, Manchester M13 9PL, U.K.

Journal of the American Chemical Society

|January 29, 2024

概括

研究人员合成了两种胺基联体的复合物,为单分子磁体 (SMM) 实现了高能量屏障. 这种进步为高密度数据存储提供了潜力,尽管旋声合会影响性能.

科学领域:

协调化学
材料科学
量子计算

背景情况:

由于它们倾向于高协调数,合成低协调的兰他化物复合物是很困难的.
预计双坐标复合物会产生高性能单分子磁铁 (SMM) 用于数据存储.
之前仅用两个单联体合成这种dysprosium复合体的尝试没有成功.

研究的目的:

合成和表征一个正式的双坐标二胺) 复合物.
研究合成复合物的磁性特性,特别是磁逆转的能量屏障 (Ueff).
了解影响基于dysprosium的SMM性能的因素.

主要方法:

二胺) 复合物[Dy{N(SiⁱPr₃) ₂][Al{OC(CF₃) ₄ (1-Dy) 的化学合成及其类型.
磁性表征以确定磁反转的能量障碍 (Ueff).
开始计算以建模电子结构,并与实验磁性数据进行比较.

主要成果:

成功合成了曲的二胺复合物 (1-Dy).
对1-Dy实验确定了950 ± 30 K的磁逆转能量屏障 (Ueff).
计算的电子结构不能完全预测实验观察到的Ueff,这表明其他因素也参与其中.

结论:

合成的dysprosium复合体表现出显著的SMM行为,尽管低于理想化的线性结构的理论预测.
强化自旋声合,受异协调球和配体振动的灵活性影响,被认为是影响磁放松的关键因素.
在设计高温SMM时,连接体振动与磁性异构同样至关重要.

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