在液体-液体接口上解开格-共价有机框架转换的早期阶段动力学
G Shreeraj1, Madhvi Tiwari2, Venkateshwar Rao Dugyala2
1Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhopal 462066, Madhya Pradesh, India.
Langmuir : the ACS journal of surfaces and colloids
|July 23, 2024
概括
后合成链接器交换 (PLE) 能够实现高质量的共价有机框架 (COF) 合成. 悬挂下降张力计揭示了通过imine中间体和乳化而加速的界面COF生长.
科学领域:
- 材料科学 材料科学 材料科学
- 超分子化学 超分子化学
- 化学工程是化学工程的重要组成部分.
背景情况:
- 后合成链接器交换 (PLE) 是一种动态共价化学策略,用于合成共价有机框架 (COF).
- PLE已经适应2D-COF膜的界面合成,在24小时内达到高晶度.
- 了解界面PLE的初始动态对于优化加速COF生长至关重要.
研究的目的:
- 为了研究共价有机框架 (COF) 合成界面后合成链路交换 (PLE) 的早期反应动态.
- 通过悬浮滴张力计,阐明液体-液体界面加速COF增长背后的机制.
- 证明张力测量对于研究各种界面COF形成路径的实用性.
主要方法:
- 悬挂下降张力计被用来测量动态界面张力 (IFT) 在imine到COF转换过程中.
- 对PLE介导与直接COF合成的IFT概况进行比较分析.
- 使用光学显微镜,电子显微镜和粉末X射线衍射 (PXRD) 进行表征.
主要成果:
- 在PLE介导和直接COF合成之间观察到对比的IFT趋势,与散装聚合动力学保持一致.
- 对于不同的合成路线,已经确定了明显的早期界面行为.
- 发现在位生成的胺介质的形成和自发乳化加速了界面COF的生长.
结论:
- 吊垂张力计是一种有价值的技术,用于探测基于PLE的COF合成中早期的界面聚合动态.
- 该研究提供了对加速界面COF生长的机制性见解,突出了imine中间体和乳化作用.
- 开发的方法适用于研究新的界面PLE介导转换的动力学,例如到COF合成.
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