Abstract
The amphiphilic and morphological properties of a novel, amino-subsituted bis(phenylethynyl)anthracene derivative (APA) are investigated at the air/water interface using a Langmuir film balance and fluorescence microscopy. The interfacial miscibility of APA and positively charged, negatively charged, and zwitterionic lipids in two-dimensional monolayer phases is characterized on the basis of surface pressure/area isotherms of binary monolayers recorded at different molar ratios of the lipid and dye components. “Excess” Gibbs free energies of mixing are calculated for the APA/lipid monolayers at different surface pressures. Organized supramolecular film structures of the (phenylethynyl)anthracene amphiphile and its mixtures with octadecylamine are deposited onto solid supports by using the Langmuir−Blodgett (LB) technique. Mono- and LB multilayers are characterized by means of UV−visible spectroscopy. Evidence is obtained for a J-type aggregation of APA in LB monolayers. The aggregation is likely favored b...
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