Fluorinated vs hydrogenated surfactants in mixtures with valinomycin—The Langmuir monolayer study |
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| Institution: | 1. Jagiellonian University, Faculty of Chemistry, Ingardena 3, 30-060 Kraków, Poland;2. University of Vigo, Faculty of Sciences, Campus Ourense, As Lagoas s/n, 32007 Ourense, Spain;1. Neuroscience Center of Excellence and Department of Ophthalmology, Louisiana State University Health Sciences Center, New Orleans, LA 70112, USA;2. Center for Stem Cell Research and Regenerative Medicine, Tulane University School of Medicine, New Orleans, LA 70112, USA;3. Department of Orthopedic Surgery, Louisiana State University Health Sciences Center, New Orleans, LA 70005, USA;1. Department of Physical Chemistry, Faculty of Pharmacy, IN2UB, Associated Unit to CSIC, UB, Av. Joan XXIII sn., 08028 Barcelona, Spain;2. Unit of Synthesis and Biomedical Application of Peptides, Department of Biomedical Chemistry, IQAC-CSIC, Jordi Girona 18, 08034 Barcelona, Spain;1. School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin 300130, China;2. The State Key Laboratory of Elemento-Organic Chemistry, Nankai University, Tianjin 300071, China;3. Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300071, China |
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| Abstract: | Selected fluorinated and hydrogenated surfactants, namely a semifluorinated alkane (SFA): 1,1,1,2,2,3,3,4,4,5,5,6,6,7,7,8,8,9,9,10,10-henicosafluorononacosane (F10H19), two long chain alcohols: 18,18,18,17,17,16,16,15,15,14,14,13,13,12,12,11,11-heptadecafluorooctadecane-1-ol (F8H10OH) and octadecane-1-ol (C18OH) and with two long chain thiols of the analogous apolar part structure to the above-mentioned alcohols, i.e.: 18,18,18,17,17,16,16,15,15,14,14,13,13,12,12,11,11-heptadecafluorooctadecane-1-thiol (F8H10SH) and octadecane-1-thiol (C18SH) have been tested in mixtures with valinomycin as potential artificial matrixes for its immobilization. The thermodynamic analysis (ΔGexc vs Xval plots) based on surface pressure–area isotherm registration for particular valinomycin/surfactant mixtures, complemented with BAM images of the films structure indicate that only fluorinated surfactants are suitable materials for valinomycin incorporation as they form homogeneous miscible monolayers at Xval below 0.5. |
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