结晶共价有机框架从金属有机框架通过化学诱导相工程
Abdul Khayum Mohammed1, Safa Gaber1, Jésus Raya2
1Department of Chemistry, Khalifa University, PO Box: 127788, Abu Dhabi, United Arab Emirates.
Scientific reports
|November 9, 2023
概括
研究人员开发了一种化学策略,将金属有机框架 (MOF) 转化为共价有机框架 (COF). 这一阶段工程改善了孔径大小,结晶性和稳定性,为先进的多孔材料提供了新的可能性.
科学领域:
- 材料科学 材料科学 材料科学
- 化学 化学 化学
- 纳米技术 纳米技术
背景情况:
- 像金属有机框架 (MOF) 和共价有机框架 (COF) 这样的有序多孔框架通常由使用金属协调或共价链接的单体构建.
- 不同类型的多孔材料 (如MOF和COF) 之间的转化是一个尚未探索的领域,有可能产生新特性.
研究的目的:
- 展示一种化学诱导相位工程策略,用于将2D结合铜基SA-MOF (Cu-Tp) 转化为2D-COF (Cu-TpCOFs).
- 为了研究由此产生的孔径,金属分布,结晶性,多孔性和稳定性的变化.
主要方法:
- 使用化学诱导策略,诱导从基于2D Cu的SA-MOF (Cu-Tp) 到2D-COF (Cu-TpCOFs) 的相位过渡.
- 使用特征化技术分析结构和性质变化,包括孔径大小,金属分布,结晶性,多孔性和稳定性.
主要成果:
- 阶段过渡成功将Cu-Tp MOF转化为Cu-TpCOF,使得在现场孔径工程从1.1 nm到1.5-2.0 nm.
- 由此产生的Cu-TpCOF表现为均和低金属兴奋剂 (1-1.5%),与母Cu-TpMOF相比,结晶性,多孔性和稳定性都提高了.
- 从现有框架中成功构建一个新的框架突显了阶段工程策略的潜力.
结论:
- 化学诱导相位工程是一种有效的策略,可以将MOF转化为具有定制性质的COF.
- 这种方法可以精确控制毛孔大小,并改善材料特性,如结晶性,多孔性和稳定性.
- 框架对框架的构建为设计具有可调节功能的先进多孔材料开辟了新的途径.
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