双极分子扭矩钥匙调节二维金属有机框架纳米板的堆叠
Wen-Qi Tang1, Xuannuo Yi2, Hanxi Guan3,4
1Jiangsu Key Laboratory of Biofunctional Materials, Jiangsu Collaborative Innovation Center of Biomedical Functional Materials, Jiangsu Key Laboratory of New Power Batteries, College of Chemistry and Materials Science, Nanjing Normal University, Nanjing 210023, China.
Journal of the American Chemical Society
|November 29, 2023
概括
研究人员开发了一种分子扭矩方法来控制二维金属有机框架 (MOF) 纳米板的堆叠. 这种对堆叠模式的精确控制可以在使用MOF静止相的异构分离中进行高级应用.
科学领域:
- 材料科学
- 纳米技术
- 超分子化学
背景情况:
- 精确控制二维纳米板的堆叠模式对于释放新特性和应用至关重要.
- 模块化纳米板堆叠的现有方法在材料科学中仍然是一个重大挑战.
- 金属有机框架 (MOF) 提供可调节的结构,但控制它们的纳米板组件是复杂的.
研究的目的:
- 开发一种用于精确控制二维金属有机框架 (MOF) 纳米板的堆叠模式的新策略.
- 研究双极分子作为"扭矩"对MOF纳米板组件的影响.
- 探索控制的纳米板堆叠在同位素分离的应用.
主要方法:
- 使用双极基 (甲,乙,,) 作为分子扭矩钥匙.
- 2D Zr-1,3,5-(4-甲) 金属有机框架 (Zr-BTB MOF) 纳米板的控制堆叠模式 (旋转或阴影).
- 通过实验测量和理论计算来描述堆叠角度.
- 使用顺序客体替代和2D 13C-1H异质核相关性 (HETCOR) 证实了基诱导机制.
- 作为静止相的堆叠纳米片的评估分离性能.
主要成果:
- 双极烯成功控制了堆叠模式,诱导了用甲和乙烯的旋转堆叠,并掩盖了用烯和烯的堆叠.
- 在旋转堆叠时观察到明显的角分布 (0-30°) 和高百分比的阴影堆叠 (64.8-93.3%).
- 证实了被遮蔽的堆叠纳米片具有高分辨率,选择性,可重复性和耐用性,用于分离二烯异构体.
- 旋转堆叠的毛孔显示出类似的化率,而阴影堆叠的毛孔显示出显著的差异.
结论:
- 双极分子扭矩战略提供了对2D多孔纳米板堆叠模式的精确控制.
- 这种方法可以合理设计基于MOF的材料,并为特定的应用提供量身定制的性能.
- 开发的阴影堆叠方法对于异构体的染色学分离非常有效.
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