Patent ID: 8492538

Claim:
A cyclodextrin derivative salt comprising: one or more anionic cyclodextrin derivatives; and one or more cations independently selected at each occurrence from a phosphonium cation or a quaternary nitrogen-containing cation, wherein the quaternary nitrogen-containing cation excludes tetraalkylammonium cation, and wherein each cation is independently substituted or unsubstituted upon each occurrence, provided that when the quaternary nitrogen-containing cation is quaternary ammonium cation, it is of the general formula (NR 1 R 2 R 3 R) + , wherein the radicals R 1 , R 2 , and R 3 are selected independently at each occurrence from the group consisting of: substituted linear or branched, saturated or unsaturated, aliphatic or alicyclic alkyl groups with 1 to 20 carbon atoms; heteroaryl groups, heteroaryl-C 1 -C 6 alkyl groups with 3 to 8 carbon atoms in the heteroaryl radical and at least one heteroatom selected from N, O and S which may be substituted with at least one group selected from C 1 -C 6 alkyl groups and/or halogen atoms; aryl, aryl-C 1 -C 6 alkyl groups with 5 to 12 carbon atoms in the aryl radical, substituted with at least one C 1 -C 6 alkyl group and/or a halogen atom; and the radical R is selected from the group consisting of: substituted linear or branched, saturated or unsaturated, aliphatic or alicyclic alkyl groups with 1 to 20 carbon atoms; heteroaryl-C 1 -C 6 alkyl groups with 3 to 8 carbon atoms in the aryl radical and at least one heteroatom selected from N, O and S, which may be substituted with at least one C 1 -C 6 alkyl group and/or halogen atom; aryl-C 1 -C 6 alkyl groups with 5 to 12 carbon atoms in the aryl radical, substituted with at least one C 1 -C 6 alkyl group and/or halogen atom; and wherein any two of R, R 1 , R 2 , R 3 can join together to form a 4- to 8-membered heterocycle including the heteroatom to which each is attached.