Patent ID: 7407953

Claim:
A phenothiazinium compound of Formula (1) wherein: each R 1 -R 6 is independently is selected from H, optionally substituted C 1-6 -alkyl, F, Cl, Br and I; A and B are independently selected from: Q is selected from optionally substituted C 1-4 -alkyl; Z is selected from C(R a ) 2 , O, S, SO 2 , and NR a in which R a is selected from H and optionally substituted C 1-4 -alkyl; Y is a counteranion selected from F − , Br − , CI − , I − , NO 3 − , SCN − , ClO 3 − , ClO 4 − , IO 3 − , BF 4 − , HSO 4 − , H 2 PO 4 − , CH 3 SO 4 − , N 3 − , SO 4 2− , HPO 4 2− , PO 4 3− , acetate, lactate, citrate, tartrate, glycolate, glycerate, glutamate, β-hydroxyglutamate, glucouronate, gluconate, malate and aspartate; and p is 1, 2 or 3, in which the optional substituents for any one of R 1 to R 6 , R a and Q are independently selected from Ph, F, Cl, Br, I, OH, OC 1-4 -alkyl, CN, OCOC 1-4 -alkyl, cyclohexyl, methyl-substituted cyclohexyl, cyclopentyl, methyl-substituted cyclopentyl, COOH, COOC 1-4 -alkyl, and SO 3 H.