Artificial sodium-selective ionic device based on crown-ether crystals with subnanometer pores

Tingyan Ye, Gaolei Hou, Wen Li, Chaofeng Wang, Kangyan Yi, Nannan Liu (), Jian Liu, Shaoming Huang () and Jun Gao ()
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Tingyan Ye: Wenzhou University
Gaolei Hou: KU Leuven, Quantum Solid-State Physics section, Department of Physics and Astronomy
Wen Li: Wenzhou University
Chaofeng Wang: Wenzhou University
Kangyan Yi: Wenzhou University
Nannan Liu: Wenzhou University
Jian Liu: Qingdao University of Science and Technology
Shaoming Huang: Guangdong University of Technology
Jun Gao: Chinese Academy of Sciences

Nature Communications, 2021, vol. 12, issue 1, 1-8

Abstract: 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 Ca2 + , which is nearly two orders of magnitude higher than the biological one, and 1128 against Mg2 + . 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.

Date: 2021
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DOI: 10.1038/s41467-021-25597-1

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