膜
选择性
离子
共价键
材料科学
离子通道
化学
离子运输机
化学工程
纳米技术
锂(药物)
有机化学
生物化学
内分泌学
催化作用
受体
工程类
医学
作者
Shaosuo Bing,Weipeng Xian,Sifan Chen,Yanpei Song,Linxiao Hou,Xiaolong Liu,Shengqian Ma,Qi Sun,Lin Zhang
出处
期刊:Matter
[Elsevier]
日期:2021-06-01
卷期号:4 (6): 2027-2038
被引量:54
标识
DOI:10.1016/j.matt.2021.03.017
摘要
As the most sophisticated separation system, biological membranes have served as natural prototypes for the design of artificial membranes because they provide high permeability and solute selectivity, owing to the presence of specialized ion channels. However, developing stable and selective artificial ion channels remains a formidable challenge. Herein, we demonstrate the construction of lithium nanochannels in two-dimensional covalent organic frameworks (COFs) to create biomimetic membranes. Implanted lithiophilic oligoethers conferred specificity and facilitated Li+ diffusion along the pore pathway of the COF. The ion channel characteristics were indicated by reversal potential measurements, showing that the relative permeability decreased in the order Li+ > K+ > Na+ > Ca2+ > Mg2+. The Li+ transfer was enhanced, while other ions were obstructed, allowing for high selectivity and permeability. A Li+/Mg2+ separation factor of 64 was achieved, confirming high lithium affinity. This study may serve as a design principle to develop selective artificial membranes for effective ion separation.
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