LANGMUIR-BLODGETT MIXED FILMS OF A TETRATHIAFULVALENE DERIVATIVE AND BEHENIC ACID - A SPECTRAL STUDY

We have studied the formation of aggregates of a TTF derivative (tetra kis(octadecylthio)tetrathiafulvalene) in solution and in Langmuir-Blod gett films. It has been found that the monolayer formation of the TTF derivative was dependent upon the concentration of the spreading solut ion and also on the maximum spreading area. The floating monolayers we re not stable at the air-water interface. However, stable mixed monola yers could be formed by adding behenic acid. The surface pressure vs a rea isotherms at several molar fractions of the components were measur ed. A molecular reorganization of the molecules during the compression may be observed. The mixed films were formed on quartz and CaF2 subst rates for W-vis and IR studies.