在八核FeIII旋转交叉金属有机中引发的可逆旋转状态切换
Zhi-Kun Liu1, Xue-Yang Ji2, Meng Yu1
1Key Laboratory of Cluster Science of Ministry of Education, School of Chemistry and Chemical Engineering, Liangxiang Campus, Beijing Institute of Technology, Beijing 102488, P. R. China.
Journal of the American Chemical Society
|July 23, 2024
概括
我们开发了新的金属有机 (MOCs),在室温以上表现出自旋交叉 (SCO) 活性. 这些子可以根据pH值的变化进行磁性切换,
科学领域:
- 协调化学
- 材料科学
- 超分子化学
背景情况:
- 旋转交叉 (SCO) 金属有机 (MOC) 是用于传感和分子切换的动态材料.
- 基于铁的MOC提供了空气稳定性,但对于SCO属性没有充分研究.
- 现有的SCO材料往往缺乏稳定性或对环境刺激的反应性.
研究的目的:
- 合成和表征具有旋转交叉活动的新型铁 (III) MOC.
- 研究环境刺激,特别是pH,对这些Fe (III) MOCs的磁性特性的影响.
- 探索这些材料作为响应磁传感器和分子开关的潜力.
主要方法:
- 两种新型Fe (III) MOCs的合成,使用双酸连接体.
- 在室温以上的SCO活动的特征.
- 使用1H NMR光谱的pH依赖磁性切换的研究.
- 使用EXAFS进行结构和电子变化的分析和理论计算.
主要成果:
- 成功合成了两种具有非典型{FeN6}类型协调球体的新型Fe ((III)) MOC.
- 在这些Fe (III) 中证明室温以上的旋转交叉活动.
- 通过酸变化引发的可逆磁切换的观察.
- 识别NH位点上的质子化/脱质子化作为调节磁性特性的机制.
结论:
- 这些Fe (III) MOC是首次报告的SCO活性Fe (III) .
- 这些子表现出多个位置,多个层次的质子诱导的旋转状态调制.
- 这些材料有望成为可调节的磁传感器和多功能分子开关.
- 这项工作扩大了SCO活性材料及其应用的范围.
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