| abstract |
An ionic liquid composition having the following chemical structural formula: n n n n n n n n n n wherein R 1 , R 2 , R 3 , and R 4 are independently selected from hydrocarbon groups containing at least 1 and up to 20 carbon atoms, and X − is a cyclic anion that possesses a negatively-charged group reactive with a gaseous electrophilic species, particularly carbon dioxide or sulfur dioxide. Methods for capturing a gaseous electrophilic species, such as CO 2 or SO 2 , by contacting the gaseous electrophilic species with an ionic liquid according to Formula (1) are also described. |