Title: Molecular Organization of Photoreactive Unsaturated Carboxylates on Langmuir–Blodgett Film
Abstract: The surface pressure–area (π–A) isotherms of dioctadecyldimethylammonium chloride (2C18DAC) and dioctadecyldimethylammonium cinnamate (2C18DA·Cin) were measured, and their time dependence was examined. The surfaces of Langmuir–Blodgett films of 2C18DAC and 2C18DA·Cin were observed by atomic force microscopy. The effect and location of cinnamate anions against molecular organization on Langmuir monolayers of 2C18DA are discussed. After preparation, cinnamate ions bind on the hydrophilic surface of the 2C18DA monolayer, by forming ion pairs with 2C18DA cations and by directing aromatic groups toward the interior of the aqueous subphase. When the Langmuir film is maintained for long periods at a constant surface pressure, cinnamate ions are intercalated into the monolayer, as aromatic groups penetrate into the hydrophobic interior of the monolayer.
Publication Year: 1998
Publication Date: 1998-02-01
Language: en
Type: article
Indexed In: ['crossref']
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Cited By Count: 8
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