Water cluster in hydrophobic crystalline porous covalent organic frameworks
Ke Tian Tan,
Shanshan Tao,
Ning Huang and
Donglin Jiang ()
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Ke Tian Tan: Faculty of Science, National University of Singapore
Shanshan Tao: Faculty of Science, National University of Singapore
Ning Huang: Faculty of Science, National University of Singapore
Donglin Jiang: Faculty of Science, National University of Singapore
Nature Communications, 2021, vol. 12, issue 1, 1-10
Abstract:
Abstract Progress over the past decades in water confinement has generated a variety of polymers and porous materials. However, most studies are based on a preconception that small hydrophobic pores eventually repulse water molecules, which precludes the exploration of hydrophobic microporous materials for water confinement. Here, we demonstrate water confinement across hydrophobic microporous channels in crystalline covalent organic frameworks. The frameworks are designed to constitute dense, aligned and one-dimensional polygonal channels that are open and accessible to water molecules. The hydrophobic microporous frameworks achieve full occupation of pores by water via synergistic nucleation and capillary condensation and deliver quick water exchange at low pressures. Water confinement experiments with large-pore frameworks pinpoint thresholds of pore size where confinement becomes dominated by high uptake pressure and large exchange hysteresis. Our results reveal a platform based on microporous hydrophobic covalent organic frameworks for water confinement.
Date: 2021
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Persistent link: https://EconPapers.repec.org/RePEc:nat:natcom:v:12:y:2021:i:1:d:10.1038_s41467-021-27128-4
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DOI: 10.1038/s41467-021-27128-4
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