title: Phosphatidylcholine-fatty Alcohols Equilibria in Monolayers at the Air/Water Interface.
abstract: Monolayers of phosphatidylcholine (PC), tetradecanol (TD), hexadecanol (HD), octadecanol (OD) and eicosanol (E) and their binary mixtures were investigated at the air/water interface. The surface tension values of pure and mixed monolayers were used to calculate π-A isotherms. The surface tension measurements were carried out at 22 °C using a Teflon trough and a Nima 9000 tensiometer. The interactions between phosphatidylcholine and fatty alcohols (tetradecanol, hexadecanol, octadecanol, eicosanol) result in significant deviations from the additivity rule. An equilibrium theory to describe the behavior of monolayer components at the air/water interface was developed in order to obtain the stability constants, Gibbs free energy values and areas occupied by one molecules of PC-TD, PC-HD, PC-OD and PC-E complexes. We considered the equilibrium between the individual components and the complex and established that phosphatidylcholine and fatty alcohols formed highly stable 1:1 complexes.
authors: Institute of Chemistry, University of Bialystok, K. Ciolkowskiego Street 1K, 15-245, Bialystok, Poland.
authors: Agnieszka
authors: A
authors: Serafin
authors: Zbigniew Artur
authors: ZA
authors: Figaszewski
authors: Aneta Dorota
authors: AD
authors: Petelska
mesh_terms: D005233:Fatty Alcohols / Q000737:chemistry*; D044367:Phase Transition; D010713:Phosphatidylcholines / Q000737:chemistry*; D053835:Unilamellar Liposomes / Q000737:chemistry*
chemical_list: D005233:Fatty Alcohols; D010713:Phosphatidylcholines; D053835:Unilamellar Liposomes