Surface properties of a long-chain 10:12 diynoic acid monolayer at air-liquid and solid-liquid interfaces |
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| Affiliation: | 1. Department of Pediatrics, University of Michigan, Ann Arbor, MI, USA;2. MM BRCF Metabolomics Core, University of Michigan, Ann Arbor, MI, USA;3. University of Nottingham, Sutton Bonington Campus, Loughborough, UK;4. School of Biodiversity One Health and Veterinary Medicine, College of Medical, Veterinary and Life Sciences, University of Glasgow, UK |
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| Abstract: | Monolayer stabilities of two long-chain diacetylene monocarboxylic acids at fluid interfaces have been studied and are compared with those of a conventional n-alkanoic acid. The diacetylene derivatives form highly incompressible solid monolayers at the air-liquid interface. Their surface pressure-area isotherms are shown to depend on the mode of monolayer compression, indicating the necessity of a cautious approach to experimental protocol. The coherence of deposited monolayers on hydrophobic glass surfaces was characterized by interference reflection microscopy. Birefringent crystals were obtained with UV polymerized pentacosanoyl 10:12 diynoic acid in sharp contrast to the well-defined deposition behaviour observed for monolayers of eicosanoic acid. |
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