Molecular organization in two-dimensional films of liquid crystalline mixtures - II. Langmuir and Langmuir-Blodgett films of a perylene-like dye mixed with liquid crystals having a terminal cyano group

Langmuir and Langmuir-Blodgett (LB) films of a perylene-like compound and i ts binary mixtures with 4-octyl-4'-cyanobiphenyl (8CB) and 4-pentyl-4 " -cy ano-p-terphenyl (5CT) have been studied. On the basis of the surface pressu re-area isotherms, the molecular organization on the air-water interface ha s been estimated. Information about the miscibility or the phase separation of components in the binary mixtures has been obtained. The spectroscopic study of the LB films has allowed conclusions to be drawn about the arrange ment of the molecules on the quartz slides. The fluorescence spectra of the LB films of the perylene-like compound have revealed the formation of self -aggregates.