A compound of Formula wherein: R 1, R 2 are, each independently, hydrogen; C 1 -C 12 alkyl; substituted or unsubstituted aryl; substituted or unsubstituted heteroaryl; substituted or unsubstituted C 5 -C 6 cycloalkyl; or C 1 -C 12 alkyl which is substituted with SH, -N(alkyl C 1 -C 6) 2, piperidino, morpholino, piperazino, -OH, -O(alkyl C 1 -C 12), -COOH; or C 1 -C 12 alkoxy; n is an integer number from 0 to 10 and when n is 0 A is directly linked to Y; A represents CHR 3, O, S or NR 4 where R 4 is hydrogen or an alkyl C 1 -C6 group; R3 is hydrogen; C 1 -C 12 alkyl; substituted or unsubstituted aryl; substituted or unsubstituted heteroaryl; substituted or unsubstituted C 5 -C 6 cycloalkyl; or C 1 -C 12 alkyl which is substituted with SH, -N(alkyl C 1 -C 6) 2, piperidino, morpholino, piperazino, -OH, -O(alkyl C 1 -C 12), - COOH; or C 1 -C 12 alkoxy; Y is selected from: wherein R 5 is a substituted or unsubstituted C 1 -C 50 alkyl group which is interrupted by one or more oxygens and may terminate with a hydroxy group or with an alkyl residue; wherein X is an inorganic or organic cation; wherein Q is an inorganic or organic anion and R 6, R 7 and R 8 are, each independently, hydrogen; C 1 -C 12 alkyl; substituted or unsubstituted aryl; substituted or unsubstitutedheteroaryl;, substituted or unsubstituted C 5 -C 6 cycloalkyl; C 1 -C 12 alkyl which is substituted with SH, -N(alkyl C 1 -C 6) 2, piperidino, morpholino, piperazino, -OH, -O(alkyl C 1 -C 12), -COOH; C 1 -C 12 alkoxy; or two of R6, R7 and R8, form a mono cyclic ring structure, wherein R 9, R 10 and R 11 are each independently one of another hydrogen, alkyl C 1 -C 12, substituted or unsubstituted phenyl, aryl or heteroaryl, cycloalkyl C 5 -C 6, alkyl C 1 -C 12 which is substituted with SH, -N(alkyl C 1 -C 6) 2, piperidino, morpholino, piperazino, -OH, - O(alkyl C 1 -C 12), -COOH; C 1 -C 12 alkoxy; or two of R 9, R 10 and R 11, form a mono cyclic ring structure, and at least one of R 9, R 10 or R 11 is selected from the following: -CH 2 CH 2 CH 2 SO 3 -, -CH 2 CH 2 CH 2 CH 2 SO 3 -, R 1, R 2 are, each independently, hydrogen; C 1 -C 12 alkyl; substituted or unsubstituted aryl; substituted or unsubstituted heteroaryl; substituted or unsubstituted C 5 -C 6 cycloalkyl; or C 1 -C 12 alkyl which is substituted with SH, -N(alkyl C 1 -C 6) 2, piperidino, morpholino, piperazino, -OH, -O(alkyl C 1 -C 12), -COOH; or C 1 -C 12 alkoxy; n is an integer number from 0 to 10 and when n is 0 A is directly linked to Y; A represents CHR 3, O, S or NR 4 where R 4 is hydrogen or an alkyl C 1 -C6 group; R3 is hydrogen; C 1 -C 12 alkyl; substituted or unsubstituted aryl; substituted or unsubstituted heteroaryl; substituted or unsubstituted C 5 -C 6 cycloalkyl; or C 1 -C 12 alkyl which is substituted with SH, -N(alkyl C 1 -C 6) 2, piperidino, morpholino, piperazino, -OH, -O(alkyl C 1 -C 12), - COOH; or C 1 -C 12 alkoxy; Y is selected from: wherein R 5 is a substituted or unsubstituted C 1 -C 50 alkyl group which is interrupted by one or more oxygens and may terminate with a hydroxy group or with an alkyl residue; wherein X is an inorganic or organic cation; wherein Q is an inorganic or organic anion and R 6, R 7 and R 8 are, each independently, hydrogen; C 1 -C 12 alkyl; substituted or unsubstituted aryl; substituted or unsubstitutedheteroaryl;, substituted or unsubstituted C 5 -C 6 cycloalkyl; C 1 -C 12 alkyl which is substituted with SH, -N(alkyl C 1 -C 6) 2, piperidino, morpholino, piperazino, -OH, -O(alkyl C 1 -C 12), -COOH; C 1 -C 12 alkoxy; or two of R6, R7 and R8, form a mono cyclic ring structure, wherein R 9, R 10 and R 11 are each independently one of another hydrogen, alkyl C 1 -C 12, substituted or unsubstituted phenyl, aryl or heteroaryl, cycloalkyl C 5 -C 6, alkyl C 1 -C 12 which is substituted with SH, -N(alkyl C 1 -C 6) 2, piperidino, morpholino, piperazino, -OH, - O(alkyl C 1 -C 12), -COOH; C 1 -C 12 alkoxy; or two of R 9, R 10 and R 11, form a mono cyclic ring structure, and at least one of R 9, R 10 or R 11 is selected from the following: -CH 2 CH 2 CH 2 SO 3 -, -CH 2 CH 2 CH 2 CH 2 SO 3 -, wherein R 5 is a substituted or unsubstituted C 1 -C 50 alkyl group which is interrupted by one or more oxygens and may terminate with a hydroxy group or with an alkyl residue; wherein X is an inorganic or organic cation; wherein Q is an inorganic or organic anion and R 6, R 7 and R 8 are, each independently, hydrogen; C 1 -C 12 alkyl; substituted or unsubstituted aryl; substituted or unsubstitutedheteroaryl;, substituted or unsubstituted C 5 -C 6 cycloalkyl; C 1 -C 12 alkyl which is substituted with SH, -N(alkyl C 1 -C 6) 2, piperidino, morpholino, piperazino, -OH, -O(alkyl C 1 -C 12), -COOH; C 1 -C 12 alkoxy; or two of R6, R7 and R8, form a mono cyclic ring structure, wherein R 9, R 10 and R 11 are each independently one of another hydrogen, alkyl C 1 -C 12, substituted or unsubstituted phenyl, aryl or heteroaryl, cycloalkyl C 5 -C 6, alkyl C 1 -C 12 which is substituted with SH, -N(alkyl C 1 -C 6) 2, piperidino, morpholino, piperazino, -OH, - O(alkyl C 1 -C 12), -COOH; C 1 -C 12 alkoxy; or two of R 9, R 10 and R 11, form a mono cyclic ring structure, and at least one of R 9, R 10 or R 11 is selected from the following: -CH 2 CH 2 CH 2 SO 3 -, -CH 2 CH 2 CH 2 CH 2 SO 3 -,