Premium
Multi‐Molar Absorption of CO 2 by the Activation of Carboxylate Groups in Amino Acid Ionic Liquids
Author(s) -
Chen FengFeng,
Huang Kuan,
Zhou Yan,
Tian ZiQi,
Zhu Xiang,
Tao DuanJian,
Jiang Deen,
Dai Sheng
Publication year - 2016
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201602919
Subject(s) - carboxylate , ionic liquid , absorption (acoustics) , chemistry , amino acid , ionic bonding , ion , molar concentration , group (periodic table) , inorganic chemistry , quantum chemical , absorption capacity , molecule , organic chemistry , materials science , catalysis , chemical engineering , biochemistry , composite material , engineering
A new strategy for multi‐molar absorption of CO 2 is reported based on activating a carboxylate group in amino acid ionic liquids. It was illustrated that introducing an electron‐withdrawing site to amino acid anions could reduce the negative inductive effect of the amino group while simultaneously activating the carboxylate group to interact with CO 2 very efficiently. An extremely high absorption capacity of CO 2 (up to 1.69 mol mol −1 ) in aminopolycarboxylate‐based amino acid ionic liquids was thus achieved. The evidence of spectroscopic investigations and quantum‐chemical calculations confirmed the interactions between two kinds of sites in the anion and CO 2 that resulted in superior CO 2 capacities.