title: Significant improvements in CO₂ capture by pyridine-containing anion-functionalized ionic liquids through multiple-site cooperative interactions.
abstract: A strategy for improving CO2 capture by new anion-functionalized ionic liquids (ILs) making use of multiple site cooperative interactions is reported. An extremely high capacity of up to 1.60 mol CO2 per mol IL and excellent reversibility were achieved by introducing a nitrogen-based interacting site on the phenolate and imidazolate anion. Quantum-chemical calculations, spectroscopic investigations, and calorimetric data demonstrated that multiple-site cooperative interactions between two kinds of interacting sites in the anion and CO2 resulted in superior CO2 capacities, which originated from the π-electron delocalization in the pyridine ring.
authors.affiliation: Department of Chemistry, ZJU-NHU United R&D Center, Zhejiang University, Hangzhou 310027 (P. R. China).
authors.forename: Xiaoyan
authors.initials: X
authors.lastname: Luo
authors.forename: Yan
authors.initials: Y
authors.lastname: Guo
authors.forename: Fang
authors.initials: F
authors.lastname: Ding
authors.forename: Hongqing
authors.initials: H
authors.lastname: Zhao
authors.forename: Guokai
authors.initials: G
authors.lastname: Cui
authors.forename: Haoran
authors.initials: H
authors.lastname: Li
authors.forename: Congmin
authors.initials: C
authors.lastname: Wang
mesh_terms: D000838:Anions / Q000737:chemistry; D002245:Carbon Dioxide / Q000737:chemistry*; D052578:Ionic Liquids / Q000737:chemistry*; D011725:Pyridines / Q000737:chemistry*; D011789:Quantum Theory; D013696:Temperature
chemical_list: D000838:Anions; D052578:Ionic Liquids; D011725:Pyridines; D002245:Carbon Dioxide; C023666:pyridine
keywords: capture; carbon dioxide; cooperative interaction; ionic liquids; multiple site