Patent ID: 8350064

Claim:
A compound having a structure selected from the group consisting of: wherein: R1, R2, R3, R4, R6, and R7 are each independently selected from the group consisting of H, C 1 to C 4 substituted or unsubstituted alkyl, C 6 to C 10 aryl, C 1 to C 4 alkenyl, C 1 to C 4 alkynyl, substituted or unsubstituted amino, halide, hydroxyl, C 1 to C 4 alkoxy, thio, nitro, C 1 to C 4 aldehyde, acetyl, C 1 to C 4 carboxyl, C 1 to C 4 alkoxycarbonyl, and C 1 to C 4 alkylaminocarbonyl; R5 is selected from the group consisting of H, C 1 to C 4 alkyl, C 1 to C 4 carboxyl, C 1 to C 4 alkoxycarbonyl, and C 1 to C 4 alkylaminocarbonyl; R8 and R9 are each independently selected from the group consisting of H, and C 1 to C 4 alkyl; and X is selected from the group consisting of F, Cl, Br, I, CF 3 COO, and PF 6 .