AN EFFICIENT SYNTHESIS OF LINEAR PORPHYRIN ARRAYS

Synthesis of linear porphyrin arrays of unusual length was reported. 1 ,4-Phenylene-bridged porphyrin oligomers up to a nonamer (ca. 122 angs trom length) were synthesized by acid catalyzed condensation of formyl -substituted porphyrins with dipyrrylmethane. The absorption and fluor escence spectra of these molecules exhibit systematic changes upon the increase in the number of the porphyrins.