Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 61, Issue 12, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.202213247
Keywords
Collidine; Covalent Organic Frameworks; Environmental Remediation; Oxoanions
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Funding
- National Natural Science Foundation of China [22001131]
- Frontiers Science Center for New Organic Matter [63181206]
- 111 projects [B12015]
- Postdoctoral Science Foundation of China [2019M660974]
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This research successfully synthesized a series of highly crystalline covalent organic frameworks (COFs) using a melt polymerization method and demonstrated the kilogram-scale fabrication of robust foams. The resulting COFs are low-cost and can be conveniently transformed into ionic COFs, exhibiting highly efficient ion-exchange adsorption capacity.
Large-scale and low-cost synthesis of covalent organic frameworks (COFs) to meet the demands of industrial application remains formidably challenge. Here we report using 2,4,6-collidine as monomer to produce a series of highly crystalline olefin-linked COFs by a melt polymerization method. This method enables the kilogram-scale fabrication of self-shaped monolithic robust foams. The afforded COFs possess extremely low cost (<50 USD/kg), superior to all the reported COFs. Furthermore, using one-pot or post-modification methods can conveniently transform neutral COFs to ionic COFs, which can be applied as highly efficient ion-exchange sorbents for scavenging oxoanion pollutants. Remarkably, the superior adsorption capacity of a model oxoanion (ReO4-) is the highest among crystalline porous materials reported so far. This work not only expands the scopes of olefin-linked COFs but also enlightens the route for the industrial production of crystalline ion exchange sorbents.
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