Sulfoxide, sulfone and urea functionalized TSILs and their interesting phase behaviors with organic solvents: Interesting systems for organic separations

I&EC 108

James H. Davis Jr., jdavis@jaguar1.usouthal.edu and Morgan Tickell. Department of Chemistry, University of South Alabama, Chemistry 223, Mobile, AL 36688
Ionic liquids containing sulfoxide, sulfone and urea appended functional groups have been prepared and characterized. These materials show putative "liquid clathrate" behavior with a number of organic solvents, including aromatics and chlorinated hydrocarbons. Interestingly, several of these materials can selectively absorb one component of a two component organic solvent mixture, easily effecting a high degree separation of the two at room temperature. Details of these systems and a discussion of the possible mechanism involved will be presented.