Synthesis of triazole- and pyridine-bridged porphyrin–chlorin and porphyrin dimers

The synthesis of 4-amino-1,2,4-triazole linked porphyrin–chlorin dimer and porphyrin dimer is described. New cationic porphyrin dimers were synthesized via the alkylation of the nitrogen atoms of 4,4′-bipyridine and 1,2-di-(4-pyridyl)ethene by meso-monobromomethylporphyrin. These cationic bisporphyrins can interact with DNA and have the ability to cleave it.