TY - JOUR
T1 - Solvent-Influenced Fragmentations in Free-Standing Three-Dimensional Covalent Organic Framework Membranes for Hydrophobicity Switching
AU - Mohammed, Abdul Khayum
AU - Al Khoori, Ayesha A.
AU - Addicoat, Matthew A.
AU - Varghese, Sabu
AU - Othman, Israa
AU - Jaoude, Maguy Abi
AU - Polychronopoulou, Kyriaki
AU - Baias, Maria
AU - Haija, Mohammad Abu
AU - Shetty, Dinesh
N1 - Publisher Copyright:
© 2022 The Authors. Angewandte Chemie International Edition published by Wiley-VCH GmbH
PY - 2022/3/21
Y1 - 2022/3/21
N2 - The ordered open organic frameworks membranes are attractive candidates for flow-assisted molecular separations. The physicochemical properties of such membranes mostly depend on their selectively chosen functional building blocks. In this work, we have introduced a novel concept of functional switchability of three-dimensional covalent organic framework (3D-COF) membranes through a simple solvent-influenced fragmentation method. This room-temperature interfacial synthesis provides free-standing 3D-COF membranes with distinct physicochemical properties from the same building monomers. Notably, the change of solvent from chloroform to ethyl acetate switches the membrane property from hydrophilic (water contact angle 60°) to hydrophobic (water contact angle 142°) nature. The hydrophobic 3D-COF membrane selectively passes oil molecules from an oil–water emulsion with a gravitational flux of 1536 L m−2 h−1.
AB - The ordered open organic frameworks membranes are attractive candidates for flow-assisted molecular separations. The physicochemical properties of such membranes mostly depend on their selectively chosen functional building blocks. In this work, we have introduced a novel concept of functional switchability of three-dimensional covalent organic framework (3D-COF) membranes through a simple solvent-influenced fragmentation method. This room-temperature interfacial synthesis provides free-standing 3D-COF membranes with distinct physicochemical properties from the same building monomers. Notably, the change of solvent from chloroform to ethyl acetate switches the membrane property from hydrophilic (water contact angle 60°) to hydrophobic (water contact angle 142°) nature. The hydrophobic 3D-COF membrane selectively passes oil molecules from an oil–water emulsion with a gravitational flux of 1536 L m−2 h−1.
KW - Covalent Organic Framework
KW - Halogen Bond
KW - Hydrophobicity
KW - Membranes
KW - Oil–Water Separation
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U2 - 10.1002/anie.202200905
DO - 10.1002/anie.202200905
M3 - Article
C2 - 35068021
AN - SCOPUS:85124819636
SN - 1433-7851
VL - 61
JO - Angewandte Chemie - International Edition
JF - Angewandte Chemie - International Edition
IS - 13
M1 - e202200905
ER -