Abstract: Syntheses and chemical characterization of a number of new porphyrin-derived sensitizers related to 'benzoporphyrin derivative' (BPD) are described. The work discussed centers in solving the isomer problem inherent in BPD synthesis from protoporphyrin IX, with regard to the 2- and 4-vinyls and the 6- and 7-propionic acid groups (Fischer nomenclature).!
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