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CO 2 ‐Cross‐Linked Frustrated Lewis Networks as Gas‐Regulated Dynamic Covalent Materials
Author(s) -
Chen Liang,
Liu Renjie,
Hao Xiang,
Yan Qiang
Publication year - 2019
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201812365
Subject(s) - frustrated lewis pair , covalent bond , lewis acids and bases , dynamic covalent chemistry , molecule , chemistry , nanotechnology , materials science , catalysis , organic chemistry , supramolecular chemistry
The design of structurally dynamic molecular networks can offer strategies for fabricating stimuli‐responsive adaptive materials. Herein we first report a gas‐responsive dynamic gel system based on frustrated Lewis pair (FLP) chemistry. Two trefoil‐like molecules with bulky triphenylborane and triphenylphosphine groups are synthesized as complementary Lewis acid and base with trivalent sites. They can together bind CO 2 gas molecules and further form a cross‐linked network via the bonding interactions between FLPs and CO 2 . Such CO 2 ‐bridged dative linkages are shown to be dynamic covalent bonds, which endow the frustrated Lewis network with adaptable behaviors and unprecedented gas‐regulated viscoelastic, mechanical, and self‐healing performance. This study is an initial attempt to apply the FLP concept in materials chemistry, but we believe that this strategy will open a promising future for gas‐sensitive smart materials.