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Porous organic cages as synthetic water channels.

ABSTRACT: Nature has protein channels (e.g., aquaporins) that preferentially transport water molecules while rejecting even the smallest hydrated ions. Aspirations to create robust synthetic counterparts have led to the development of a few one-dimensional channels. However, replicating the performance of the protein channels in these synthetic water channels remains a challenge. In addition, the dimensionality of the synthetic water channels also imposes engineering difficulties to align them in membranes. Here we show that zero-dimensional porous organic cages (POCs) with nanoscale pores can effectively reject small cations and anions while allowing fast water permeation (ca. 10⁹ water molecules per second) on the same magnitude as that of aquaporins. Water molecules are found to preferentially flow in single-file, branched chains within the POCs. This work widens the choice of water channel morphologies for water desalination applications.

SUBMITTER: Yuan YD

PROVIDER: S-EPMC7530991 | biostudies-literature | 2020 Oct

REPOSITORIES: biostudies-literature

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Porous organic cages as synthetic water channels.

Yuan Yi Di YD Dong Jinqiao J Liu Jie J Zhao Daohui D Wu Hui H Zhou Wei W Gan Hui Xian HX Tong Yen Wah YW Jiang Jianwen J Zhao Dan D

Nature communications 20201001 1

Nature has protein channels (e.g., aquaporins) that preferentially transport water molecules while rejecting even the smallest hydrated ions. Aspirations to create robust synthetic counterparts have led to the development of a few one-dimensional channels. However, replicating the performance of the protein channels in these synthetic water channels remains a challenge. In addition, the dimensionality of the synthetic water channels also imposes engineering difficulties to align them in membrane ...[more]

PMID: 33004793

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