Patent ID: 8735603

Claim:
A compound represented by the structure of the following Formula 1: wherein (a) Z is —[(CH 2 ) b —O] c —(CH 2 ) d — wherein b and d are each independently integers from 1 to 4, and c is an integer from 1 to 8; (b) R 2 and R 3 are each independently H or a C 1 to C 6 straight-chain or branched alkyl group; (c) R 4 is H, a C 1 to C 6 straight-chain or branched alkyl group, or —[(CH 2 ) p —X] q —(CH 2 ) r —Y—R 6 wherein X and Y are each independently O or NR 6 , p and r are each independently an integer from 1 to 4, q is an integer from 0 to 8, and R 6 is H or a C 1 to C 6 straight-chain or branched alkyl group; and (d) A − is an anion selected from the group consisting of levulinate, [BF 4 ] − , [PF 6 ] − , [SbF 6 ] − , [CH 3 CO 2 ] − , [HSO 4 ] − , [CF 3 SO 3 ] − , [HCF 2 CF 2 SO 3 ] − , [CF 3 HFCCF 2 SO 3 ] − , [CF 3 —O—CFHCF 2 SO 3 ] − , [CF 3 CF 2 OCFHCF 2 SO 3 ] − , [CF 3 CF 2 CF 2 OCFHCF 2 SO 3 ] − , [HCClFCF 2 SO 3 ] − , [(CF 3 SO 2 ) 2 N] − , [AlCl 4 ] − , [CF 3 CO 2 ] − , [NO 3 ] − , [SO 4 ] 2− , Cl − , Br − , I − , and F − .