Patent ID: 7829739

Claim:
A composition of matter selected from the group consisting of tetradecyl(tri-n-hexyl)phosphonium 1,1,2-trifluoro-2-(perfluoroethoxy)ethanesulfonate, tetradecyl(tri-n-butyl)phosphonium 1,1,2,3,3,3-hexafluoropropanesulfonate, tetradecyl(tri-n-hexyl)phosphonium 1,1,2-trifluoro-2-(trifluoromethoxy)ethanesulfonate, (3,3,4,4,5,5,6,6,7,7,8,8,8-tridecafluorooctyl)-trioctylphosphonium 1,1,2,2-tetrafluoroethanesulfonate, and tetrabutylphosphonium 1,1,2-trifluoro-2-(perfluoroethoxy)ethanesulfonate.