MIXED MONOMOLECULAR FILM BEHAVIOR OF CROWN-ETHER AND PORPHYRINS WITH ARACHIDIC ACID

In this paper, the mixed monomolecular films of arachidic acid with 3' -pentadecylbenzo-15-crown-5 and six lipid-free tetraphenylporphyrins w hich are difficult to form insoluble monolayers alone are studied. The results show that the crown ether is embedded in and porphyrins are s queezed out of the arachidic acid monolayers. The visible absorption s pectra of all porphyrin-cadmium arachidate LB films indicate that ther e are some degree of agglomeration between porphyrin molecules. By mea ns of scanning electron microscope, the morphological structure of por phyrin-cadmium arachidate LB film is observed, and phase separation in mixed monolayers can be monitored without Au coating.