ELECTROCHEMICAL SALT FORMATION IN BIS(PHTHALOCYANINATO)YTTERBIUM(III)-STEARIC ACID LANGMUIR-BLODGETT-FILMS

The negative deviation of areas per molecule from calculated values and low collapse rates of Langmuir monolayers of bis(phthalocyaninato)ytterbium(III)-stearic acid mixtures is discussed in terms of phase miscibility. Postdeposition stearic acid salt formation in Langmuir-Blodgett films is investigated using X-ray diffraction and infrared absorption studies. It is found that the salt formation occurs upon reduction of the bis(phthalocyaninato) ytterbium(III). The redox potentials of pure and mixed films of bis(phthalocyaninato)ytterbium(III) are also investigated. A wetting and/or charge-injection mechanism was observed for mixed films.