单分子磁铁性质的silole和stannole结合的埃尔循环-octatetraenyl三明治复合体
Siddhartha De1, Arpan Mondal1, Yan-Cong Chen2
1Department of Chemistry, School of Life Sciences, University of Sussex, Brighton, BN1 9QR, UK.
Chemistry (Weinheim an der Bergstrasse, Germany)
|January 27, 2025
概括
新的复合体,包括和联体,表现出单分子磁体行为. 这些有机金属化合物具有相似的结构和磁性质,与的交换对的影响最小.
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:
- 埃尔比亚复合物因其磁性特性而受到关注.
- 已知有兰他尼德复合物,其中含有环丁二烯类同类 (Cp) 和环八二烯 (COT) 连接物.
- 单分子磁铁 (SMM) 在f元素复合体中的行为是一个关键的研究领域.
研究的目的:
- 合成和表征的新型 η5 - 和 η5 - 复合物.
- 为了研究这些新的复合物的结构和磁性特性.
- 为了比较和复合物的SMM行为与它们的类似物.
主要方法:
- 合成 [η5-CpSi) 盐的 Er8-COT) - 和 [η5-CpSn) Er8-COT) - .
- 进行X射线晶体学以确定分子结构.
- 测量磁性易感性和初始计算,以分析磁性和电子结构.
主要成果:
- 获得了同结构的三明治复合体[η5-CpSi) 埃尔[η8-COT) ]− (1Si) 和[η5-CpSn) 埃尔[η8-COT) ]− (1Sn).
- 这两种复合体都在零应用场中表现出单分子磁铁行为,具有可比的能量障碍 (115±7和125±3厘米-1).
- 最初的计算显示了类似的电子结构,放松可能通过第一次激发的克莱默斯双倍.
结论:
- 静态和静态复合体显示出非常相似的结构和动态磁性特性.
- 在这些复合体中,换锡对它们的单分子磁铁行为产生最小的影响.
- 这些发现有助于理解14组元素对兰坦化物SMM的影响.
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