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Toward azo-linked covalent organic frameworks by developing linkage chemistry via linker exchange.


ABSTRACT: Exploring new linkage chemistry for covalent organic frameworks (COFs) provides a strong driving force to promote the development of this emerging class of crystalline porous organic materials. Herein we report a strategy to synthesize COFs with azo linkage, one of the most important functional unit in materials science but having not yet been exploited as a linkage of COFs. This strategy is developed on the basis of in situ linker exchange, by which imine-linked COFs are completely transformed into azo-linked COFs (Azo-COFs). Moreover, distinct properties of Azo-COFs from their corresponding imine-linked precursors are observed, indicating unique property of Azo-COFs. This strategy provides a useful approach to develop new linkage chemistry for COFs. It also has established a synthetic method for azo-linked COFs, which not only enriches the family of COFs but also offers a platform to explore properties and applications of this class of crystalline porous conjugated polymers.

SUBMITTER: Zhou ZB 

PROVIDER: S-EPMC9023542 | biostudies-literature | 2022 Apr

REPOSITORIES: biostudies-literature

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Toward azo-linked covalent organic frameworks by developing linkage chemistry via linker exchange.

Zhou Zhi-Bei ZB   Tian Peng-Ju PJ   Yao Jin J   Lu Ya Y   Qi Qiao-Yan QY   Zhao Xin X  

Nature communications 20220421 1


Exploring new linkage chemistry for covalent organic frameworks (COFs) provides a strong driving force to promote the development of this emerging class of crystalline porous organic materials. Herein we report a strategy to synthesize COFs with azo linkage, one of the most important functional unit in materials science but having not yet been exploited as a linkage of COFs. This strategy is developed on the basis of in situ linker exchange, by which imine-linked COFs are completely transformed  ...[more]

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