Patent ID: 7348427

Claim:
A compound having the formula wherein i is 3; one of X 1 , X 2 , and X 3 is a ring vertex selected from the group consisting of —O—, —S—, and —NR 2 —, and the other two of X 1 , X 2 , and X 3 are ring vertices selected from the group consisting of ═N— and ═CR 4 —, wherein each moiety is the same or different and at least one moiety is other than each R 1 is independently H, F, Cl, CN, CF 3 , OH, N(R 2 ) 2 , OR 2 or a substituted or unsubstituted (C 1 -C 12 )alkyl group, with the proviso that at least one R 1 is F, Cl, CN or CF 3 ; each R 2 and R 3 is independently H or a substituted or unsubstituted (C 1 -C 12 )alkyl group; each R 4 is independently H, F, Cl, Br, I, CN, OH, NO 2 , NH 2 , or a substituted or unsubstituted (C 1 -C 12 )alkyl group; Z(R 2 ) n is a member selected from the group consisting of: r is an integer ranging from 2 to 8, inclusive; each R 25 is independently selected from the group consisting of H, CH 3 , CH 2 CH 3 , CH 2 CH 2 CH 3 , or CH(CH 3 ) 2 ; said compound having at least one basic group having a pK b of 12 or less or a quaternized nitrogen group.