离子键合
选择性
钠
冠醚
离子
钾
纳米孔
膜
化学
材料科学
纳米技术
有机化学
生物化学
催化作用
作者
Tingyan Ye,Gao‐Lei Hou,Wen Li,Chaofeng Wang,Kangyan Yi,Nannan Liu,Jian Liu,Shaoming Huang,Jun Gao
标识
DOI:10.1038/s41467-021-25597-1
摘要
Abstract Biological sodium channels ferry sodium ions across the lipid membrane while rejecting potassium ions and other metal ions. Realizing such ion selectivity in an artificial solid-state ionic device will enable new separation technologies but remains highly challenging. In this work, we report an artificial sodium-selective ionic device, built on synthesized porous crown-ether crystals which consist of densely packed 0.26-nm-wide pores. The Na + selectivity of the artificial sodium-selective ionic device reached 15 against K + , which is comparable to the biological counterpart, 523 against Ca 2 + , which is nearly two orders of magnitude higher than the biological one, and 1128 against Mg 2 + . The selectivity may arise from the size effect and molecular recognition effect. This work may contribute to the understanding of the structure-performance relationship of ion selective nanopores.
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