双二甲十甲基二硫酸的合成和磁性特性
Sophie C Corner1, Gemma K Gransbury1, Iñigo J Vitorica-Yrezabal1
1Department of Chemistry, The University of Manchester, Oxford Road, Manchester M13 9PL, U.K.
Inorganic chemistry
|February 21, 2024
概括
新的dysprosium复合物显示了创纪录的磁性记忆效应,推进了单分子磁铁技术. 这些十甲基酸表现出增强的特性,为未来的磁性存储应用铺平了道路.
科学领域:
- 有机金属化学 有机金属化学
- 材料科学 材料科学 材料科学
- 磁力学 磁力学 是一种
背景情况:
- 十甲基基酸 ([Dy(Cp*) 2]+) 之前曾被研究为单分子磁铁 (SMM).
- 较大的dysprosocenium离子最近证明了高达80K的磁性记忆效应.
- [Dy(Cp*) 2+的独特结构和电子性质表明了有利于SMM行为的潜力.
研究的目的:
- 为了合成和表征新型的十甲基酸酸的酸添加物.
- 调查这些新复杂物体的磁性特性,重点关注SMM行为.
- 探索二联体对[Dy(Cp*) 2+的SMM性能的影响.
主要方法:
- 通过连续反应合成二甲二甲十甲基二硫酸.
- 使用X射线衍射,NMR,ATR-IR光谱学,元素分析和SQUID磁力学进行表征.
- 使用密度函数理论 (DFT) 和初始计算的计算分析.
主要成果:
- [Dy(Cp*) 2(PhX-κ-X) 2][Al{OC(CF3) 3}4 (X=F,Cl) 和[Dy(Cp*) 2C6H4F2-κ2-F,F) C6H4F2-κ-X) 22的成功合成了Al{OC==CF334.
- 在合成的阴离子中观察高度曲的Cp*···Dy···Cp*角.
- 复杂的[Dy(Cp*) 2 PhF-κ-F) 2[Al{OC(CF3) 3}4]实现了创纪录的能量屏障为930(6) 厘米-1的SMM与{Dy(Cp*) 2}碎片.
结论:
- [Dy(Cp*) 2]+的双二烯添加物表现出独特的结构特征和SMM特性.
- 观察到的SMM参数受到联体场效应和线性偏差的影响.
- 这些发现有助于开发先进的单分子磁铁材料.
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