期刊
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
卷 144, 期 22, 页码 9827-9835出版社
AMER CHEMICAL SOC
DOI: 10.1021/jacs.2c02405
关键词
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资金
- Office of Science, Office of Basic Energy Sciences, of the U.S. Department of Energy [DE-AC02-05CH11231]
- Department of Energy (DOE), Office of Basic Energy Sciences, Division of Materials Sciences and Engineering [DE-AC02-76SF00515]
Covalent organic frameworks (COFs) have shown great potential for various advanced applications due to their unique structure. Researchers have developed a synthetic approach that introduces nitrogen-containing heterocycles into COFs, leading to the introduction of new functionalities. This general strategy opens up possibilities for a broader range of functional porous crystalline materials.
Covalent organic frameworks (COFs) show great potential for many advanced applications on account of their structural uniqueness. To address the synthetic challenges, facile chemical routes to engineer the porosity, crystallinity, and functionality of COFs are highly sought after. Herein, we report a synthetic approach that employs the Cadogan reaction to introduce nitrogen-containing heterocycles as the linkages in the framework. Irreversible indazole and benzimidazolylidene (BIY) linkages are introduced into COFs for the first time via phosphine-induced reductive cyclization of the common imine linkages following either stepwise or one-pot reaction protocols. The successful linkage transformation introduces new functionalities, as demonstrated in the case of BIY-COF, which displays excellent intrinsic proton conductivity without the need of impregnation with external proton transfer reagents. Such a general strategy will open the window to a broader class of functional porous crystalline materials.
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