异素Cu (II) 复合物的溶剂控制的固态相位过渡与伊米达基替代的基氧化物
Kristina A Smirnova1, Irina V Golomolzina1, Galina V Romanenko1
1International Tomography Center, Siberian Branch, Russian Academy of Sciences, 630090, Institutskaya str., 3a, Novosibirsk, Russia. bus@tomo.nsc.ru.
Dalton transactions (Cambridge, England : 2003)
|July 23, 2024
概括
观察到铜 (II) 链溶酸盐的自发固态转化,由溶剂损失驱动,并受溶剂类型的影响. 这些变化影响磁性特性,导致这些聚合物复合体中的新的磁性排序和旋转转变.
科学领域:
- 协调化学 协调化学
- 材料科学 材料科学 材料科学
- 固态化学 固态化学
背景情况:
- 聚合物链铜 (II) 复合物表现出不同的磁性特性.
- 溶剂分子可以影响协调化合物的固态结构和行为.
- 了解溶剂控制的转换对于设计功能性材料至关重要.
研究的目的:
- 为了研究铜 (II) 复合物的聚合物链溶酸盐中的自发固态转化.
- 探索不同溶剂分子对转变动力学和磁性特性的影响.
- 报告这些系统中的新型磁现象.
主要方法:
- 聚合物链溶酸盐的合成 [Cu(hfac) 2LPr]·0.5Solv.
- 在环境条件下的固态转换研究.
- 测量磁性易感度以探测磁性行为.
- 射线晶体学 (隐含) 用于确定结构变化.
主要成果:
- 观察到各种溶质的自发的,溶剂控制的固态转化.
- 对于THF和溶酸盐,完全转化为双核复合物发生的速度很快.
- 对于二甲,二甲和酸盐,部分转化为1D聚合物或混合物发生缓慢.
- 磁性行为对溶剂分子高度敏感,在几个溶解物中观察到过渡到低于4K的磁性有序状态.
- 对于THF和酸盐溶解物,观察到在190K的旋转过渡,这与铜原子环境和交换相互作用的变化有关.
结论:
- 溶剂的选择对这些铜 (II) 聚合物链溶解物中固态变化的速率和结果进行了批判性控制.
- 这些转换显著改变了磁性,包括诱导磁顺序和旋转过渡.
- 这项研究揭示了协调聚合物的结构属性关系的新见解,并突出了它们对可调节磁性行为的潜力.
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