Patent ID: 7858383

Claim:
A chromoionophore of Formula (I) wherein, r and s independently are selected from the group consisting of 0, 1 or 2, and L is a chromophoric moiety selected from the group consisting of —NO 2 , Formula (II) and (III), wherein Ar is (C 6 -C 10 ) aromatic moiety or a (C 5 -C 14 ) heteroaromatic moiety containing one or more heteroatoms selected from N, O, and S, and wherein Ar is substituted with one or more substituents selected from the group consisting of hydrogen, —NO 2 , —NO, —CN, (C 1 -C 8 ) straight chain or branched alkyl, (C 2 -C 8 ) alkenyl, halogen, —SO 3 H, —W—COOH, —W—N(R 1 ) 3 , —C(O)OR 1 , and —C(O)R 1 ; W is (C 1 -C 8 ) alkylene; and R 1 is selected from the group consisting of hydrogen and (C 1 -C 8 ) straight chain or branched alkyl, with the proviso that when r is 1 and s is 0, then L is not