在超扩散水层内限制二维共价有机框架薄膜的合成
Qing Hao1,2, Chuangqi Zhao3, Bing Sun4
1Key Laboratory of Molecular Nanostructure and Nanotechnology, Institute of Chemistry , Chinese Academy of Sciences and Beijing National Laboratory for Molecular Sciences , Beijing 100190 , P. R. China.
Journal of the American Chemical Society
|September 5, 2018
概括
这项研究引入了一种新的方法,用于合成独立的二维共价有机框架 (2D COF) 薄膜,使用油中的水乳液. 这些COF薄膜具有出色的机械性能,适用于纳米过和传感.
科学领域:
- 材料科学
- 纳米技术
- 化学工程
背景情况:
- 二维共价有机框架 (2D COF) 是具有调节性质的先进材料.
- 现有的二维COF合成方法往往会产生粉末或需要复杂的程序.
- 开发独立的2DCOF薄膜对于先进的应用至关重要.
研究的目的:
- 开发一种新且高效的2DCOF薄膜封闭合成方法.
- 描述合成的COF薄膜的结构,形态和机械特性.
- 展示这些独立的COF薄膜在纳米过和传感中的应用潜力.
主要方法:
- 采用封闭合成方法,在油中浸泡的水凝上使用薄型超散水作为反应介质.
- 在油/水/水凝界面上加载单体进入油和水凝阶段,以促进COF合成.
- 使用原子力显微镜 (AFM) 缩影进行机械性质表征.
主要成果:
- 成功合成具有同质地形,大面积和可控制厚度 (4-150 nm) 的独立二维COF薄膜.
- 标志性薄膜表现出具有特定方向的结晶性和25.9 ± 0.6 GPa的扬模,表明良好的机械强度.
- 证明了这些薄膜在制造纳米过器膜和Ru3+光电化学传感器中的实用性.
- 扩展了合成策略,以产生晶体的酸伊米达酸框架-8 (ZIF-8) 薄膜.
结论:
- 开发的油/水/水凝接口策略为合成高质量,独立的2DCOF薄膜提供了新的途径.
- 合成的COF薄膜具有先进的膜和传感器应用的理想特性.
- 该方法的多功能性得到了成功应用到ZIF-8合成中,突出了其广泛的适用性.
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