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Self‐Generation of Surface Roughness by Low‐Surface‐Energy Alkyl Chains for Highly Stable Superhydrophobic/Superoleophilic MOFs with Multiple Functionalities
Author(s) -
Zhu NengXiu,
Wei ZhangWen,
Chen ChengXia,
Wang Dawei,
Cao ChenChen,
Qiu QianFeng,
Jiang JiJun,
Wang HaiPing,
Su ChengYong
Publication year - 2019
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201909912
Subject(s) - alkyl , catalysis , sonogashira coupling , materials science , surface energy , chemical engineering , ligand (biochemistry) , self assembly , metal organic framework , metal , hydrophobic effect , palladium , contact angle , chemistry , polymer chemistry , nanotechnology , organic chemistry , composite material , adsorption , engineering , biochemistry , receptor
We transformed the hydrophilic metal–organic framework (MOF) UiO‐67 into hydrophobic UiO‐67‐R s (R=alkyl) by introducing alkyl chains into organic linkers, which not only protected hydrophilic Zr 6 O 8 clusters to make the MOF interspace superoleophilic, but also led to a rough crystal surface beneficial for superhydrophobicity. The UiO‐67‐R s displayed high acid, base, and water stability, and long alkyl chains offered better hydrophobicity. Good hydrophobicity/oleophilicity were also possible with mixed‐ligand MOFs containing metal‐binding ligands. Thus, a (super)hydrophobic MOF catalyst loaded with Pd centers efficiently catalyzed Sonogashira reactions in water at ambient temperature. Studies of the hydrophobic effects of the coordination interspace and the outer surface suggest a simple de novo strategy for the synthesis of superhydrophobic MOFs that combine surface roughness and low surface energy. Such MOFs have potential for environmentally friendly catalysis and water purification.