Patent ID: 7141688

Claim:
A dye stabilizer represented by the following formula: wherein: M is a metal ion; n is 2 or 3; R 1 , R 2 , R 3 , R 4 and R 5 are, independently, R f -A- (wherein R f and A are defined below), hydrogen, hydroxyl, halogen, nitro, cyano, alkyl, heteroalkyl, aryl, heteroaryl, alkylaryl, arylalkyl, alkyl-heteroaryl, heteroalkylaryl, aryl-heteroalkyl, heteroarylalkyl, alkoxy, aryloxy, benzoyl, acetyl, carbonyl, sulfonyl, amido, carbamoyl, sulfonamido, sulfamoyl or heterocyclyl, or any two of R 1 , R 2 , R 3 , R 4 or R 5 together form a cycloalkyl or heterocyclic group, provided that at least one of R 1 , R 2 , R 3 , R 4 and R 5 is R f -A-; A in R f -A- is absent, oxygen or an alkylene chain; and R f is a fluorinated alkyl, a fluorinated aryl, or a fluorinated polymeric or oligomeric moiety.