CHEMICAL BEHAVIOR OF OCOTITANIUM(IV) PHTHALOCYANINE (OTIPC) SOLUTIONSASSOCIATED WITH THE PREPARATION OF OTIPC MONOLAYERS AND MULTILAYERS

The chemical behaviour of oxotitanium(rv) phthalocyanine (OTiPc) in mi xtures of dichloromethane and trihalogenoacetic acids was studied by m eans of spectroscopic measurements. In dichloromethane-trifluoroacetic acid mixtures, OTiPc was relatively unstable, undergoing gradual deco mposition via the radical cation of OTiPc; phthalimide and 3-iminoisoi ndolin-1-one were isolated. In dichloromethane-trichloroacetic acid mi xed solvent, on the other hand, a stable solution of OTiPc was obtaine d with no formation of the radical cation. A monolayer of OTiPc was fo rmed upon spreading this solution onto the water surface and was depos ited on substrates with a horizontal lifting method to form a multilay er film. Polarized visible and near-IR absorption spectra and X-ray di ffraction of the film indicated a specific order of molecular orientat ion.