不寻常的状的Ln根协调网络来自一个含有两个伊米达组的基氧化物:单晶到单晶的转换和磁性特性
Chao-Yi Jin1, Qiuxue Zhang1, Jinkui Tang2
1Department of Chemistry, Key Laboratory of Advanced Energy Materials Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China. llicun@nankai.edu.cn.
Dalton transactions (Cambridge, England : 2003)
|April 17, 2025
概括
新的2D协调网络的gadolinium和dysprosium与一个多牙的氧化联结体表现出独特的状结构和磁性特性. 这些材料显示出单晶转化和缓慢磁放松的潜力.
科学领域:
- 协调化学 协调化学
- 材料科学 材料科学 材料科学
- 磁电化学 磁电化学 磁电化学
背景情况:
- 对先进的磁性材料来说,开发具有化 (Ln) 离子和激素连接体的新型协调网络至关重要.
- 多联体为构建复杂网络架构提供了多功能协调模式.
- 尼нил氧化物基因因因其磁性交换相互作用而闻名.
研究的目的:
- 通过使用多酸尼氧化连接体合成和描述新的二维 (2D) 协调网络.
- 研究这些Ln根复合体的结构特征,包括拓和单晶转换.
- 探索合成材料的磁性特性,如磁性交换和放松行为.
主要方法:
- 合成{[Gd(hfac) 3]3 (NIT-Ph-3,5-bIm) 2) ·2.25C6H14 (1) 和{[Dy(hfac) 33 (NIT-Ph-3,5-bIm) 2) ·2.5C6 (NIT-Ph-3,5-bIm) 14 (2) 使用兰酸离子,酸 (hfac) 和多酸氧化 (和NIT-Ph-3,5-bIm).
- 单晶X射线衍射以确定晶体结构并确定二维网络拓 (KIa).
- 直接电流 (DC) 和动态磁性易感性研究,以探测磁交换相互作用和放松动态.
主要成果:
- 两种不寻常的两维协调网络成功合成和特征化.
- 观察到单晶到单晶的转变,从非中心对称的转变为中心对称的空间组,并失去螺旋性.
- 加多衍生品表现出占主导地位的铁磁Gd-NO交换,而异类比则表现出缓慢的磁放松行为.
结论:
- 多牙尼氧化联体有效地连接LnIII离子,形成具有KIa拓的独特的2D网络.
- 观察到的单晶转换凸显了这些协调网络的动态性质.
- 磁性研究揭示了有希望的铁磁相互作用和缓慢的磁性放松,这表明了分子磁力学中的潜在应用.
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