期刊
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
卷 139, 期 49, 页码 17771-17774出版社
AMER CHEMICAL SOC
DOI: 10.1021/jacs.7b11283
关键词
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资金
- National Natural Science Foundation of China [21571079, 21621001, 21261130584, 21390394, 21571076, 21571078]
- 111 project [B07016]
- Thousand Talents program (China)
Covalent organic frameworks (COFs) have emerged as functional materials for various potential applications. However, the availability of three-dimensional (3D) COFs is still limited, and nearly all of them exhibit neutral porous skeletons. Here we report a general strategy to design porous positively charged 3D ionic COFs by incorporation of cationic monomers in the framework. The obtained 3D COFs are built of 3-fold interpenetrated diamond net and show impressive surface area and CO2 uptakes. The ion-exchange ability of 3D ionic COFs has been highlighted by reversible removal of nuclear waste model ions and excellent size-selective capture for anionic pollutants. This research thereby provides a new perspective to explore 3D COFs as a versatile type of ion-exchange materials.
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