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Redox‐Active Two‐Dimensional Covalent Organic Frameworks (COFs) for Selective Reductive Separation of Valence‐Variable, Redox‐Sensitive and Long‐Lived Radionuclides
Author(s) -
Li Yang,
Guo Xinghua,
Li Xiaofeng,
Zhang Meicheng,
Jia Zhimin,
Deng Yun,
Tian Yin,
Li Shoujian,
Ma Lijian
Publication year - 2020
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201916360
Subject(s) - chemistry , redox , adsorption , chemisorption , protonation , physisorption , valence (chemistry) , covalent bond , covalent organic framework , selectivity , inorganic chemistry , selective adsorption , photochemistry , organic chemistry , catalysis , ion
We report the first example of 2D covalent organic framework nanosheets (Redox‐COF1) for the selective reduction and in situ loading of valence‐variable, redox‐sensitive and long‐lived radionuclides (abbreviated as VRL nuclides). Compared with sorbents based on chemical adsorption and physical adsorption, the redox adsorption mechanism of Redox‐COF1 can effectively reduce the impact of functional group protonation under the usual high‐acidity conditions in chemisorption, and raise the adsorption efficiency from the monotonous capture by pores in physisorption. The adsorption selectivity for UO 2 2+ reaches up to unprecedented ca. 97 % at pH 3, more than for any analogous adsorbing material.