Polymer-particle light-cleavable carrier systems for photodynamic therapy

A polymer, selected from the group consisting of

• a polycarbonate of formula 10
• wherein n=0 or 1;
• x=+5-1000;
• R1 is H or an alkyl chain with 1 to 5 carbon atoms;
• R2 is selected from the group consisting of
• R3 is a divalent radical selected from the group consisting of an alkyl, aryl and alkylene group having 1 to 10 carbon atoms;
• a block copolymer of formula 12
• wherein n=0 or 1;
• x=45-1000;
• y=1-1000;
• R1 is H or an alkyl chain with 1 to 5 carbon atoms;
• R2 is selected from the groups consisting of
• R3 is a divalent radical selected from the group consisting of an alkyl, aryl and alkylene group having 1 to 10 carbon atoms;
• and
• a polyester of formula 13
• wherein n=0 or 1;
• x=5−1000;
• R1 is H or an alkyl chain with 1 to 5 carbon atoms;
• R2 is selected from the group consisting of
• R3 is selected from the group consisting of an alkyl, aryl and alkylene group having 1 to 10 carbon atoms.