嵌合式异金属Cu8Ln4复合体与Enantiopure希夫基联体:合成,结构,光谱和磁性研究
Despina Dermitzaki1, Angeliki Panagiotopoulou2, Michael Pissas1
1Institute of Nanoscience and Nanotechnology, NCSR "Demokritos", 15310, Aghia Paraskevi, Athens, Greece.
ChemPlusChem
|April 9, 2024
概括
石化希夫基联结物产生了新的十二核铜-兰坦化复合体,在溶液中保持了性. 这些复合物表现出独特的磁性,包括一些含有Dy的化合物的慢磁放松.
科学领域:
- 协调化学 协调化学
- 超分子化学 超分子化学
- 材料科学 材料科学 材料科学
背景情况:
- 希夫基联体是协调化学中的多功能构建块.
- 基拉尔配体对于开发反选择性催化剂和材料至关重要.
- 异金属复合体具有可调节的电子和磁性质.
研究的目的:
- 为了合成和描述新型的性异金属十二核复合体.
- 研究这些复合物的结构和磁性特性.
- 探索联结体性对复杂形成和特性的影响.
主要方法:
- 合成纯净的 Schiff 基联体.
- 十二核复合体的结晶和X射线衍射分析.
- 循环二极化 (CD) 光谱法以确认溶液中的性.
- 测量磁性易感性 (DC和AC) 以研究磁性行为.
主要成果:
- 成功合成了具有总式[Cu8Ln4 (((OH) 8 (((OMe) 4 ((O2CBut) 8 ((L-S或L-R) 4 ((H2O) 4)) 的奇拉二核铜-兰坦化物复合物.
- 复合体是同型的,在非中心对称的极空间组C2中结晶,证实了性.
- 在溶液中保留了奇拉性,镜像CD光谱证明了这一点.
- 磁性研究揭示了Dy含有复合物 (3S) 中的铁磁相互作用,以及其他复合物中的反铁磁相互作用.
- 在2K以下的复杂3S中观察到缓慢的磁放松现象.
结论:
- 精度纯希夫基联体成功指导了奇拉异金属十二核复合体的形成.
- 配体的性有效地转移到复合体及其晶体结构中.
- 这些性复合体表现出有趣的磁性特性,包括缓慢磁放松的潜力,使它们成为分子磁力应用的候选者.
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