将COF膜通道划分为超微孔和π电子丰富的区间,用于多组件离子分离
Meidi Wang1,2, Zhuo-Hao Wu1,2, Guan-Zheng Zhou1,2
1College of Materials and Chemical Engineering, Key Laboratory of Inorganic Nonmetallic Crystalline and Energy Conversion Materials, China Three Gorges University, Yichang, 443002, P.R. China.
Angewandte Chemie (International ed. in English)
|September 13, 2025
概括
新型共价有机框架 (COF) 膜通过使用点击化学来分割通道来实现精确的离子分离. 这些超微孔膜在分离复杂的离子混合物方面表现出卓越的性能.
科学领域:
- 材料科学 材料科学 材料科学
- 纳米技术 纳米技术
- 化学工程是化学工程的重要组成部分.
背景情况:
- 联有机框架 (COF) 对纳米级选具有前景,但制造超微孔膜 (<0.7 nm) 仍然具有挑战性.
- 现有的COF膜通常具有0.8-10.0纳米范围的光圈,限制了它们在精确的分子和离子分离中的应用.
研究的目的:
- 开发具有精确控制的通道尺寸的新型超微孔COF膜,用于先进的离子分离.
- 调查点击化学用于通道分区的使用,并探索由此产生的材料特性用于选择性离子传输.
主要方法:
- 合成了两种新的alkynyl COF膜,使用铜催化化环添加 (CuAAC) 点击化学.
- 利用双化物分子与基基基基发生反应,形成三醇环桥,将COF通道分成六角或四角结构.
- 在分离三元和二元离子混合物时评估了膜性能,包括Li+/Mg2+/(K+) 和F-/SO42-/(Cl-).
主要成果:
- 通过点击化学成功制造出具有分区通道的超微孔性COF膜.
- 三醇环引入了阴离子或阴离子排斥的区域,从而实现了精确的离子选择性.
- 通过p-TpPa-CCH膜在分离复杂的离子混合物中实现了高选择性,例如K+/Mg2+ (101.2) 和Li+/Mg2+ (30.9).
结论:
- 开发的COF膜为超微孔材料制造和精确离子分离提供了一个多功能平台.
- 使用点击化学的通道分区是为高级分离应用量身定制COF膜性能的有效策略.
- 这些发现推动了具有广泛应用性的高性能离子分离膜的开发.
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