CHARACTERIZATION AND LANGMUIR-BLODGETT DEPOSITION OF NOVEL PORPHYRIN COMPOUNDS

A novel range of sulphonamido porphyrins based on meso-tetraphenylporp hyrin has been synthesized and assessed for Langmuir-Blodgett (LB) dep osition. Those substituted with long hydrocarbon chains have been show n to form stable Langmuir films. On acidic subphases the molecules bec ome protonated as the film is compressed. Molecular areas suggest that the porphyrin rings are packed in a tilted arrangement on the water s urface. When these material are transferred onto solid substrates a pr eferred molecular orientation perpendicular to the dipping direction i s observed.