Chemically stable polyarylether-based covalent organic frameworks

The development of crystalline porous materials with high chemical stability is of paramount importance for their practical application. Here, we report the synthesis of polyarylether-based covalent organic frameworks (PAE-COFs) with high crystallinity, porosity and chemical stability, including tow...

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Bibliographic Details
Published in:Nature chemistry Vol. 11; no. 6; pp. 587 - 594
Main Authors: Guan, Xinyu, Li, Hui, Ma, Yunchao, Xue, Ming, Fang, Qianrong, Yan, Yushan, Valtchev, Valentin, Qiu, Shilun
Format: Journal Article
Language:English
Published: London Nature Publishing Group UK 01.06.2019
Nature Publishing Group
Subjects:
639/638
639/638/298
639/638/455
639/638/549
Analytical Chemistry
Antibiotics
Benzene
Biochemistry
Catechol
Chemical Sciences
Chemistry
Chemistry and Materials Science
Chemistry/Food Science
Corrosion resistance
Covalence
Crystal structure
Crystallinity
Functional groups
Inorganic Chemistry
Metal-organic frameworks
Organic Chemistry
Oxidation
Physical Chemistry
Porosity
Porous materials
Recyclability
Stability
Substitution reactions
Zeolites
ISSN:1755-4330, 1755-4349, 1755-4349
Online Access:Get full text
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Summary:The development of crystalline porous materials with high chemical stability is of paramount importance for their practical application. Here, we report the synthesis of polyarylether-based covalent organic frameworks (PAE-COFs) with high crystallinity, porosity and chemical stability, including towards water, owing to the inert nature of their polyarylether-based building blocks. The PAE-COFs are synthesized through nucleophilic aromatic substitution reactions between ortho -difluoro benzene and catechol building units, which form ether linkages. The resulting materials are shown to be stable against harsh chemical environments including boiling water, strong acids and bases, and oxidation and reduction conditions. Their stability surpasses the performance of other known crystalline porous materials such as zeolites, metal–organic frameworks and covalent organic frameworks. We also demonstrate the post-synthetic functionalization of these materials with carboxyl or amino functional groups. The functionalized PAE-COFs combine porosity, high stability and recyclability. A preliminary application of these materials is demonstrated with the removal of antibiotics from water over a wide pH range. The development of porous, crystalline materials with high chemical stability is crucial for their practical uses. Now, polyarylether-based covalent organic frameworks (PAE-COFs) have been synthesized that show high crystallinity and porosity, as well as good stability against harsh chemical environments including boiling water and strong acids and bases.
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ISSN:1755-4330
1755-4349
1755-4349
DOI:10.1038/s41557-019-0238-5