Patent ID: 7704284

Claim:
Compounds of formula (1) Y 1 —Z 1 —X 1 —S—S—X 2 —Z 2 —Y 2 , wherein X 1 and X 2 independently from each other are C 1 -C 30 alkylene, which may be interrupted by —NH, —O— or —S—; C 2 -C 30 alkenylene; C 5 -C 30 cycloalkylene; C 5 -C 30 arylene; or C 5 -C 40 arylene-C 1 -C 30 alkylene; or combinations thereof; Z 1 and Z 2 independently from each other are —C(O)—; —C(O)O—; —OCO—; —NR 16 —; (R 16 )NC(O); —O—; —S—; —S(O)—; C(O)—N—R 16 ; or —S(O) 2 —; Y 1 and Y 2 , independently from each other are the residue of an organic dye which corresponds to the formula R 1 is N + R 8 R 9 ; R 8 and/or R 9 independently from each other are hydrogen; C 1 -C 12 alkyl; or phenyl-C 1 -C 4 alkyl; or R 8 and/or R 9 are a bivalent C 3 -C 6 alkylene radical which is linked to the carbon atoms C 1 or C 2 respectively and, together with the linking nitrogen atom form a 6 to 16-membered carbocyclic ring; R 2 is NR 10 R 11 ; or OR 10 ; R 10 and R 11 , independently from each other are hydrogen; C 1 -C 12 alkyl; or phenyl-C 1 -C 4 alkyl; or R 10 and/or R 11 are a bivalent C 3 -C 6 alkylene radical which is linked to the carbon atoms C 3 or C 4 respectively and, together with the linking nitrogen or oxygen atom form a 6 to 16-membered carbocyclic ring; or R 10 and R 11 together with the linking nitrogen atom form a 4 to 8 membered carbocyclic ring; R 3 , R 4 , R 5 , R 6 and R 7 independently form each other are hydrogen; C 1 -C 12 alkyl; halogen; NR 12 R 13 ; or a radical of formula (1a 1 ) R 12 and R 13 independently from each other are hydrogen; C 1 -C 12 alkyl; phenyl-C 1 -C 4 alkyl; or a radical of formula (1a 2 ) V is —O—; or —NR 15 ; R 14 , R 15 R 16 and R 17 independently from each other are hydrogen; or C 1 -C 5 alkyl; and Hal is a halogen atom; and wherein at least one of R 3 , R 4 , R 5 , R 6 and R 7 is hydrogen.