期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 57, 期 21, 页码 6042-6048出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201712246
关键词
cations; covalent organic frameworks; functionalization; porous materials; X-ray diffraction
资金
- National Natural Science Foundation of China [21571079, 21621001, 21261130584, 21390394, 21571076, 21571078]
- 111 project [B07016, B17020]
- Guangdong and Zhuhai Science and Technology Department Project [2013B090200052, 2012D0501990028]
- Ministry of Education, Science and Technology Development Center Project [20120061130012]
- program for JLU Science and Technology Innovative Research Team
- Thousand Talents program (China)
- China-French joint laboratory Zeolites
Chemical functionalization of covalent organic frameworks (COFs) is critical for tuning their properties and broadening their potential applications. However, the introduction of functional groups, especially to three-dimensional (3D) COFs, still remains largely unexplored. Reported here is a general strategy for generating a 3D carboxy-functionalized COF through postsynthetic modification of a hydroxy-functionalized COF, and for the first time exploration of the 3D carboxy-functionalized COF in the selective extraction of lanthanide ions. The obtained COF shows high crystallinity, good chemical stability, and large specific surface area. Furthermore, the carboxy-functionalized COF displays high metal loading capacities together with excellent adsorption selectivity for Nd3+ over Sr2+ and Fe3+ as confirmed by the Langmuir adsorption isotherms and ideal adsorbed solution theory (IAST) calculations. This study not only provides a strategy for versatile functionalization of 3D COFs, but also opens a way to their use in environmentally related applications.
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