自组装的兰酸正方形网格 (Ln = Er,Dy和Tb):Dy显示SMM/SMT和Tb显示SMT行为
Suman Mondal1, Deepanshu Chauhan2, Thierry Guizouarn3
1School of Chemistry, University of Hyderabad, Hyderabad 500046, India.
Inorganic chemistry
|September 12, 2024
概括
新的四核兰坦化团表现出独特的磁性. Dy和Tb集群显示铁磁相互作用和单分子磁体行为,而Er集群显示反铁磁相互作用.
科学领域:
- 协调化学 协调化学
- 无机化学 无机化学 有机化学
- 材料科学 材料科学 材料科学
背景情况:
- 兰化物团因其独特的磁性和光学特性而引起人们的兴趣.
- 设计具有特定磁性行为的分子架构是材料科学中的一个关键挑战.
研究的目的:
- 为了合成和描述新的四核兰坦化集群.
- 研究这些集群的磁性特性,包括单分子磁体 (SMM) 和单分子 toroic (SMT) 行为.
主要方法:
- 使用LnCl3·6H2O,bis[α-hydroxy(p-bromophenyl) methyl]phosphinic酸和pivalic酸合成四核兰坦化集群.
- 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以探测磁相互作用和SMM行为.
主要成果:
- 在Ln = Er (1), Dy (2) 和Tb (3) 的情况下形成[Me4N]2[Ln4(μ2-η1:η1-PO2R2) 8(η2-CO2But) 4(μ4-CO3)]集群.
- 1 中的 Er (III) 呈现出反铁磁相互作用.
- 2中的Dy (III) 和3中的Tb (III) 显示铁磁相互作用和SMM行为.
- 综合体2和3显示单分子形 (SMT) 行为.
结论:
- 合成的四核兰坦化集群表现出不同的磁性特性.
- 综合体2和3显示出有希望的单分子磁铁和单分子 toroic 特性.
- 这些发现有助于开发基于化协调复合物的新型磁性材料.
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