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Title: Preorganization and Cooperation for Highly Efficient and Reversible Capture of Low-Concentration CO 2 by Ionic Liquids

Here, 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.
Authors:
 [1] ; ORCiD logo [2] ;  [1] ;  [1] ;  [1] ; ORCiD logo [3] ; ORCiD logo [1]
  1. Henan Normal Univ., Henan (China)
  2. Henan Normal Univ., Henan (China); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  3. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Univ. of Tennessee, Knoxville, TN (United States)
Publication Date:
Grant/Contract Number:
AC05-00OR22725
Type:
Accepted Manuscript
Journal Name:
Angewandte Chemie (International Edition)
Additional Journal Information:
Journal Name: Angewandte Chemie (International Edition); Journal Volume: 56; Journal Issue: 43; Journal ID: ISSN 1433-7851
Publisher:
Wiley
Research Org:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; anions; carbon dioxide fixation; cooperative effects; ionic liquids; preorganization
OSTI Identifier:
1462885