确定零场分裂和磁性交换在二进制欧 (II) 复合体中的影响
Stephanie H Carpenter1, Joshua Mengell2, Ju Chen2
1Chemistry Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States.
Inorganic chemistry
|April 26, 2024
概括
合成了新的双金属欧复合物,其中含有双酸 (BAP) 和β-二酸 (Acac) 连接物. 与Acac支持的模拟物相比,BAP支持的欧复合物表现出优越的稳定性,显示出类和类金属支持应用的潜力.
科学领域:
- 有机金属化学 有机金属化学
- 兰化物和动化物协调化学
背景情况:
- 已知双酸 (BAP) 和β-二酸 (Acac) 连接体可以支持类金属和类金属.
- 探索新型连接体系统对于开发稳定和功能性的f元素复合体至关重要.
研究的目的:
- 使用BAP和Acac合物合成和表征新的分子双金属欧 ((II) 复合物.
- 为了比较合成的BAP和Acac支持的欧复合物的稳定性和磁性.
主要方法:
- 通过盐转化反应合成欧 (II) 复合物,使用双 (bis) 甲 (mesitoyl) (phosphide) [Na (mesBAP) ]和甲替代β-二甲 (β-diketonate) [mesAcac]进行合成.
- 使用单晶X射线衍射,UV视,IR和NMR光谱仪进行表征.
- 磁性研究包括可变温度磁性易感性和磁化测量.
主要成果:
- 成功地分离和表征了[Eu(mesBAP) ((et2o) ]和[Eu(mesAcac) ((et2o) ]复合体.
- 在无氧,无水条件下,[Eu(mesBAP) ((et2o) ]显示出高稳定性,而[Eu(mesAcac) ((et2o) ]显示出分解.
- 这两种复合体都显示了类似的磁交换合 (Jex) 和轴向零场分裂 (D) 值.
结论:
- 与β-二甲基酸盐连接体相比,双甲基酸连接体为欧二复合体提供了增强的稳定性.
- 这些发现凸显了BAP配体作为f元素化学的强大支持者的潜力.
- 磁性特性表明,尽管连接体稳定性的差异,但可比的电子环境.
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