独特的双层和三层的稀土 9,10-二博甲烯复合体的排列,具有单分子磁体的特征
Cedric Uhlmann1, Luca Münzfeld1, Adrian Hauser1
1Institute of Inorganic Chemistry, Karlsruhe Institute of Technology (KIT), Engesserstraße 15, 76131, Karlsruhe.
Angewandte Chemie (International ed. in English)
|February 23, 2024
概括
这项研究报告了新型稀土复合物的合成与9,10-diborataanthracene配体,创建独特的三层结构和三层结构. 一些复合体表现出单分子磁铁行为,扩大稀土协调化学.
科学领域:
- 有机金属化学 有机金属化学
- 协调化学 协调化学
- 材料科学 材料科学 材料科学
背景情况:
- 9,10-二甲 (DBA) 连接体是一种14-π电子系统,以其高还原潜力和用于小分子激活而闻名.
- 稀土元素复合物因其独特的电子和磁性特性而引起人们的兴趣.
- 以前的DBA连接体的协调化学在很大程度上忽视了稀土元素.
研究的目的:
- 为了合成和描述包含9,10-diborataanthracene配体的新型稀土复合物.
- 探索这些综合体的结构多样性,包括三层建筑和三层建筑.
- 研究合成的稀土DBA复合物的磁性特性,特别是单分子磁体 (SMM) 行为.
主要方法:
- 在二9,10-二甲基-9,10-二二甲酸甲[K2 (DEDBA) ]和稀土前体[LnIII (η8) -CotTIPS (BH4) (thf) x]之间进行盐分去除反应.
- 软体测量控制 (1:1和1:2比) 以产生不同的复杂类型.
- 从多烯结晶形成协调聚合物.
- 测量磁敏度以评估磁性和SMM行为.
主要成果:
- 对Ln = Y,Dy,Er的异体感三层复合体[K(η8-CotTIPS) LnIII(η6-DEDBA]和异体感三层复合体[η8-CotTIPS) LnIII(μ-η6:η6-DEDBA) LnIII(η8-CotTIPS) 的成功合成.
- 从多烯结晶形成一维协调聚合物的形成.
- 识别了第一个带有六个成员环甲板的三层胺化合物和第一个带有异环协调球的三价胺三层胺化合物.
- 在特定的Dy和Er三明治和三层复合体中观察单分子磁铁 (SMM) 的行为.
- 在三层复合体中增强磁性特征,原因是兰化离子之间的反铁磁相互作用.
结论:
- 这项工作确定了在稀土协调化学中使用9,10-diborataanthracene配体的可行性.
- 合成的复合物代表了新的结构图案,包括新的三层兰化物.
- 观察到的SMM行为和磁相互作用凸显了这些稀土DBA复合体在分子磁性的潜力.
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