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Preorganization and Cooperation for Highly Efficient and Reversible Capture of Low‐Concentration CO 2 by Ionic Liquids
Author(s) -
Huang Yanjie,
Cui Guokai,
Zhao Yuling,
Wang Huiyong,
Li Zhiyong,
Dai Sheng,
Wang Jianji
Publication year - 2017
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201706280
Subject(s) - ionic liquid , gravimetric analysis , chemistry , ion , ionic bonding , imide , quantum chemical , inorganic chemistry , molecule , organic chemistry , catalysis
A novel strategy based on the concept of preorganization and cooperation has been designed for a superior capacity to capture low‐concentration CO 2 by imide‐based ionic liquids. By using this strategy, for the first time, an extremely high gravimetric CO 2 capacity of up to 22 wt % (1.65 mol mol −1 ) and excellent reversibility (16 cycles) have been achieved from 10 vol. % of CO 2 in N 2 when using an ionic liquid having a preorganized anion. Through a combination of quantum‐chemical calculations and spectroscopic investigations, it is suggested that cooperative interactions between CO 2 and multiple active sites in the preorganized anion are the driving force for the superior CO 2 capacity and excellent reversibility.