Self-aggregation and phase separation of a styryl dye in monolayer at the liquid–air interface and in Langmuir–Blodgett films
Literature Information
Filippo Gambinossi, Piero Baglioni, Gabriella Caminati
The styryl dye 4-[2-[6-(dioctylamino)-2-naphthalenyl]ethenyl]-1-(3-sulfopropyl)-pyridinium inner salt, (Di-8-ANEPPS), was incorporated in mixed Langmuir, (L), monolayers with the cationic surfactant, octadecyltrimethylammonium bromide, (OTMA). The stability of the monolayers was found to vary with the surface pressure and the amount of the diluent in the mixtures. The organization of the dye at the interface, deduced from surface pressure–area, π–A, and surface potential–area, ΔV–A, isotherms, is compared with the spectroscopic data in Langmuir and Langmuir–Blodgett, (LB), films. UV–visible absorption spectra of the pure dye and of the mixtures in L and LB monolayers show the formation of aggregates or domains of Di-8-ANEPPS within the matrix at high amphiphile content. On the contrary, successful transfer of the monomeric form of the dye was achieved using small molar fraction of the cationic matrix.
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Physical Chemistry Chemical Physics (PCCP) is an international journal co-owned by 19 physical chemistry and physics societies from around the world. This journal publishes original, cutting-edge research in physical chemistry, chemical physics and biophysical chemistry. To be suitable for publication in PCCP, articles must include significant innovation and/or insight into physical chemistry; this is the most important criterion that reviewers and Editors will judge against when evaluating submissions. The journal has a broad scope and welcomes contributions spanning experiment, theory, computation and data science. Topical coverage includes spectroscopy, dynamics, kinetics, statistical mechanics, thermodynamics, electrochemistry, catalysis, surface science, quantum mechanics, quantum computing and machine learning. Interdisciplinary research areas such as polymers and soft matter, materials, nanoscience, energy, surfaces/interfaces, and biophysical chemistry are welcomed if they demonstrate significant innovation and/or insight into physical chemistry. Joined experimental/theoretical studies are particularly appreciated when complementary and based on up-to-date approaches.












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