在3d4f的单分子磁铁属性中,有3d4f的异金属铁和复合体,涉及酸联体
Bertrand Lefeuvre1, Thierry Guizouarn1, Vincent Dorcet1
1CNRS, ISCR (Institut des Sciences Chimiques de Rennes)-UMR 6226, University of Rennes, 35000 Rennes, France.
Molecules (Basel, Switzerland)
|September 9, 2023
概括
这项研究合成了新的铁 - 协调复合体,揭示了由于铁磁相互作用的化合物1和2中的单分子磁铁行为. 综合体3和4显示铁在混合氧化状态.
科学领域:
- 协调化学 协调化学
- 材料科学 材料科学 材料科学
- 磁电化学 磁电化学 磁电化学
背景情况:
- 新型协调复合体的合成和表征对于开发先进材料至关重要.
- 基于兰他尼德的协调复合物,特别是那些涉及 (Dy) 的协调复合物,由于其磁性特性而引起人们的兴趣.
- 研究异金属复合体可以导致独特的磁性行为和分子磁力学中的潜在应用.
研究的目的:
- 为了合成和描述新型的同金属和异金属协调复合体,其中包括dysprosium和铁.
- 研究合成复合物的结构和磁性特性.
- 探索这些复杂物作为单分子磁铁的潜力.
主要方法:
- (E) -N'-(2-基-3-甲基利丁) 皮拉-2-碳水化合物 (H2opch) 连接体与异前体的反应.
- 合成异金属复合物使用铁盐和辅配体,如1,2-Bis(2-基-3-甲基利丁) 氨酸 (H2bmh).
- 单晶X射线衍射用于结构确定.
- 直流 (dc) 和动态磁性易感度测量.
主要成果:
- 同金属Dy复合物的形成[Dy2(hfac) 3(H2O) ((Hopch) 2) [Dy(hfac) 4) (1).
- 异金属四核复合物的分离:[FeDy3 (hfac) 8 (H2O) 2 (opch) 2 (2) ],[Fe3Dy (hfac) 6 (opch) 2 (H2bmh) ]·C6H14 (3) 和[Fe2Dy (hfac) 7 (opch) 2 (H2bmh) ]·0.5C7H16 (4) ].
- 复合物3和4含有+II和+III氧化状态的铁.
- 综合体1和2由于铁磁相互作用而表现出单分子磁体行为.
结论:
- 该研究成功合成了一系列基于Dy的新型同金属和Fe-Dy异金属协调复合体.
- 结构分析显示,四核复合体的形成具有不同的Fe:Dy比率.
- 磁性研究证实了单分子磁体在特定复合体中的行为,突出了铁磁相互作用的作用.
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