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Designed Synthesis of a 2D Porphyrin‐Based sp 2 Carbon‐Conjugated Covalent Organic Framework for Heterogeneous Photocatalysis
Author(s) -
Chen Rufan,
Shi JiLong,
Ma Yuan,
Lin Guiqing,
Lang Xianjun,
Wang Cheng
Publication year - 2019
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201902543
Subject(s) - photocatalysis , covalent organic framework , imine , porphyrin , covalent bond , conjugated system , stacking , carbon fibers , chemistry , photochemistry , chemical engineering , materials science , catalysis , combinatorial chemistry , organic chemistry , polymer , composite number , composite material , engineering
The construction of stable covalent organic frameworks (COFs) for various applications is highly desirable. Herein, we report the synthesis of a novel two‐dimensional (2D) porphyrin‐based sp 2 carbon‐conjugated COF (Por‐sp 2 c‐COF), which adopts an eclipsed AA stacking structure with a Brunauer—Emmett—Teller surface area of 689 m 2 g −1 . Owing to the C=C linkages, Por‐sp 2 c‐COF shows a high chemical stability under various conditions, even under harsh conditions such as 9 m HCl and 9 m NaOH solutions. Interestingly, Por‐sp 2 c‐COF can be used as a metal‐free heterogeneous photocatalyst for the visible‐light‐induced aerobic oxidation of amines to imines. More importantly, in comparison to imine‐linked Por‐COF, the inherent structure of Por‐sp 2 c‐COF equips it with several advantages as a photocatalyst, including reusability and high photocatalytic performance. This clearly demonstrates that sp 2 carbon‐linked 2D COFs can provide an interesting platform for heterogeneous photocatalysis.