液态离子液体在共价有机框架中的液态-液态相分离,用于可热切换的质子导电
Wenhui Yao1, Yongkui Chen1,2, Timing Fang3
1School of Chemistry and Materials Engineering, Xinxiang University, Xinxiang, Henan 453003, P. R. China.
The journal of physical chemistry letters
|September 6, 2023
概括
研究人员使用功能化共价有机框架 (COF) 和离子液体 (IL) 开发了可切换的质子导电性. 这项创新使COF纳米孔内的可逆导电性控制成为可能,这对于先进的电解质设计至关重要.
科学领域:
- 材料科学 材料科学 材料科学
- 纳米技术纳米技术
- 电化学 电化学 电化学
背景情况:
- 联有机框架 (COF) 由于它们的规则通道,为固体电解质提供了潜在的潜力.
- 设计具有可调节性质的智能导电COF仍然是一个重大挑战.
- 离子液体 (ILs) 在各种应用中被探索其导电性质.
研究的目的:
- 为了制造热敏的含有离子液体的COF.
- 为了研究在COF纳米孔内ILs的相位行为.
- 在基于COF的材料中实现可切换的质子导电性.
主要方法:
- 用PEG功能化的离子液体 (ILs) 通过键被定在COF壁上.
- 由此产生的材料,IL@COF,经历了不同的湿度水平,以观察相位行为.
- 测量了质子导电性,以评估切换性和循环稳定性.
主要成果:
- 在高湿度下,COF纳米孔内的ILs表现出较低的临界溶液温度 (LCST) 类型相位行为.
- 由于IL-COF相互作用,水性ILs的相分离温度在COF通道内下降.
- 通过IL相混合性和COF纳米孔中的分离,实现了质子导电性的可逆切换.
- 在20个切换周期后,IL@COF材料的导电性没有显著下降.
结论:
- 这项研究展示了PEG功能化的ILs在COF中定用于可切换质子导电性的第一个例子.
- 这些发现提供了关于在狭窄的纳米空间内液态相隔离的见解.
- 这项工作为基于COF的可切换质子导电材料的设计开辟了新的途径.
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