三角 lanthanide 复合体的长亚利法链衍生物
Yiwei Zhou1, Christian D Buch1, Steen H Hansen1
1Department of Chemistry, University of Copenhagen, Universitetsparken 5, DK-2100 Copenhagen, Denmark. Piligkos@chem.ku.dk.
Dalton transactions (Cambridge, England : 2003)
|June 15, 2023
概括
通过将YbL与1-octadecylamine进行反应,合成了新的兰化物复合物 (LnL18). 这些复合物表现出与原始YbL相似的磁性,其中八基链影响了晶体包装和自旋格子放松.
科学领域:
- 协调化学 协调化学
- 兰化物复合物 兰化物复合物
- 有机金属化学 有机金属化学
背景情况:
- 已知具有悬挂化基组的三角 lanthanide 复合体 (LnL) 与初级胺基发生反应.
- 用初级胺基对LnL的修改产生了新的异形兰坦化物复合物.
研究的目的:
- 为了合成和描述新型的异形兰坦化物复合物,LnL18.
- 调查这些新复杂物体的结构和磁性特性.
- 为了比较LnL18与父LnL复合体的属性.
主要方法:
- 通过与1-octadecylamine反应LnL (Ln = Yb, Lu) 来合成LnL18复合体.
- 使用X射线晶体学进行结构性表征 (对于YbL18).
- 磁性测量包括静电磁感应和AC磁感应.
- 排放光谱测量以确定能量水平的分解.
主要成果:
- YbL18的晶体结构显示了Yb(III) 协调球的微妙扰动,保持了七度协调.
- 八基链通过范德瓦尔斯相互作用直接将晶体包装成脂友性阵列.
- 在YbL18和YbL之间,F7/2地面倍数的能量水平分割是相似的.
- 在稀释样品中,旋转格子放松受直接和拉曼过程的控制,在高温下在YbL18中放松更快.
结论:
- LnL与1-octadecylamine的衍生形成LnL18,保留了兰化离子的核心协调环境.
- 长长的阿里巴斯链影响了固态包装和动态.
- 八甲基链有助于更高温度的衍生复合体中更快的自旋晶格放松,这可能是由于声子相互作用的增加.
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