Institute of Chemistry, Universidade Federal do Rio Grande do Sul, Av. Bento Gonçalves, 9500, Porto Alegre, 91501-970 RS, Brazil.
I3N-CENIMAT, Dep. Ciência dos Materiais, Fac. Ciências e Tecnologia, UNL, 2829-516, Caparica, Portugal.
ChemSusChem. 2017 Dec 22;10(24):4927-4933. doi: 10.1002/cssc.201701044. Epub 2017 Aug 9.
Confined water in aqueous solutions of imidazolium-based ionic liquids (ILs) associated with acetate and imidazolate anions react reversibly with CO to yield bicarbonate. Three types of CO sorption in these "IL aqueous solutions" were observed: physical, CO -imidazolium adduct generation, and bicarbonate formation (up to 1.9 mol mol of IL), resulting in a 10:1 (molar ratio) total absorption of CO relative to imidazolate anions in the presence of water 1:1000 (IL/water). These sorption values are higher than the classical alkanol amines or even alkaline aqueous solutions under similar experimental conditions.
在与乙酸根和咪唑根阴离子相关联的咪唑鎓基离子液体（ILs）的水溶液中，被限制的水可逆地与 CO 反应生成碳酸氢盐。在这些“IL 水溶液”中观察到三种类型的 CO 吸附：物理吸附、CO-咪唑加合物生成和碳酸氢盐形成（最高可达 1.9 mol mol 的 IL），导致在水存在下（IL/水的摩尔比为 1:1000）相对于咪唑根阴离子的 CO 总吸收达到 10:1（摩尔比）。这些吸附值高于在类似实验条件下的经典烷醇胺甚至碱性水溶液。
