Efficient metal ion sieving in rectifying subnanochannels enabled by metal-organic frameworks.

Nature Materials
Jun LuHuanting Wang

Abstract

Biological ion channels have remarkable ion selectivity, permeability and rectification properties, but it is challenging to develop artificial analogues. Here, we report a metal-organic framework-based subnanochannel (MOFSNC) with heterogeneous structure and surface chemistry to achieve these properties. The asymmetrically structured MOFSNC can rapidly conduct K+, Na+ and Li+ in the subnanometre-to-nanometre channel direction, with conductivities up to three orders of magnitude higher than those of Ca2+ and Mg2+, equivalent to a mono/divalent ion selectivity of 103. Moreover, by varying the pH from 3 to 8 the ion selectivity can be tuned further by a factor of 102 to 104. Theoretical simulations indicate that ion-carboxyl interactions substantially reduce the energy barrier for monovalent cations to pass through the MOFSNC, and thus lead to ultrahigh ion selectivity. These findings suggest ways to develop ion selective devices for efficient ion separation, energy reservation and power generation.

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Citations

Jun 26, 2020·Nature Materials·Alexandre Legrand, Shuhei Furukawa
Nov 24, 2020·Chemical Society Reviews·Haozhen DouZhongwei Chen
Sep 1, 2020·The Science of the Total Environment·Xin ShengXubiao Luo
Jan 19, 2021·Journal of the American Chemical Society·Congcong ZhuLiping Wen
Mar 25, 2021·Journal of the American Chemical Society·Yijun QianWeiwei Lei
May 25, 2021·ACS Applied Materials & Interfaces·Shi-Qi ChengHaibing Li
May 4, 2021·Chemistry : a European Journal·Bin LiangBanglin Chen
Jun 25, 2021·Chemical Science·Alexandre LegrandShuhei Furukawa
Jul 17, 2021·ACS Applied Materials & Interfaces·Lulu FuJin Zhai
May 29, 2020·ACS Applied Materials & Interfaces·Chen ZhaoHuanting Wang
Aug 17, 2021·Advanced Materials·Ryan M DuChanoisMenachem Elimelech
Nov 21, 2020·Analytical Chemistry·Long MaYinghua Qiu
Oct 27, 2020·ACS Applied Materials & Interfaces·Muhammad UsmanWolfgang Ensinger
Oct 13, 2021·ACS Nano·Xuechen ZhouMenachem Elimelech
Oct 16, 2021·Chemistry : a European Journal·Jianfeng ZhangJan J Weigand

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Methods Mentioned

BETA
X-ray

Software Mentioned

LAMMPS

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