Highly fluorinated C18 fatty acids: synthesis and interfacial properties

Dynamic Molecular Behavior of Semi-Fluorinated Oleic, Elaidic and Stearic Acids in the Liquid State

“…Samples of Z - 11,11,12,12,13,13,14,14,15,15,16,16,17,17,18,18,18-heptadecafluoro-9-octadecenoic acid SF-oleic acid, 99 pure as a derivative of oleic acid cis-9-octadecenoic acid , its E-isomer SF-elaidic acid, 99 pure as a derivative of elaidic acid trans-9-octadecenoic acid and 11, 11,12,12,13,13,14,14,15,15,16,16, 17,17,18,18,18-heptadecafluorooctadecanoic acid SF-stearic acid, 99 pure as a derivative of stearic acid octadecanoic acid were synthesized and used; their synthesis procedures were presented in the previous paper 20 . The purity of fluorinatedfatty acids was checked by 1 H-NMR, 19 F-NMR and HPLC analysis 20 .…”

“…The purity of fluorinatedfatty acids was checked by 1 H-NMR, 19 F-NMR and HPLC analysis 20 . Sample oleic acid 99.9 pure was kindly supplied from the Research Institute Biological Materials Kyoto, Japan .…”

“…Table 1 lists melting temperatures and enthalpies of fusion of SF-acids and their corresponding H-acids obtained through DSC measurements. In the table, equilibrium spreading pressures ESPs of the fatty acids sprinkled on a clean surface of water at 298 K 20,27 are also listed.…”

“…Recently, semi-fluorinated fatty acids SF-acids containing a perfluorooctyl group C 8 F 17 as a terminal segment in hydrophobic chains have been synthesized 20 . They have relatively low melting temperatures close to those of the corresponding ordinary fatty acids H-acids .…”

Study of the zinc action on the 2-chloroethyl 2-bromo-2-perfluoroalkylethanoates

“…These chains have particular chemical [1,2], physical [3][4][5][6] and biological [7][8][9][10] properties. Their introduction into organic molecules gives them particular properties compared to their non-fluorinated homologues [11].…”