Transfer of the tetraethylammonium cation across a phosphatidic acid layer adsorbed at a water/1,2-dichloroethane interface: The effect of electric polarization of the interface - Electrochemically controlled ion exchange

0341186 - ÚFCH JH 2010 RIV CH eng J - Journal Article
Jänchenová, Hana - Štulík, K. - Maeda, K. - Mareček, Vladimír
Transfer of the tetraethylammonium cation across a phosphatidic acid layer adsorbed at a water/1,2-dichloroethane interface: The effect of electric polarization of the interface - Electrochemically controlled ion exchange.
Journal of Electroanalytical Chemistry. Roč. 632, 1-2 (2009), s. 55-58. ISSN 1572-6657. E-ISSN 1873-2569
R&D Projects: GA AV ČR IAA400400806
Institutional research plan: CEZ:AV0Z40400503
Keywords : liquid-liquid interface * phospholipid layers * phosphatidic acid (DPPA)
Subject RIV: CF - Physical ; Theoretical Chemistry
Impact factor: 2.338, year: 2009

The transfer of the tetraethylammonium (TEA) cations across the interface between an aqueous phase and an organic phase of 1,2-dichloroethane, with a layer of dipalmitoyl phosphaticlic acid (DPPA) adsorbed at the interface, was studied by cyclic voltammetry. It has been shown that the passage of the TEA(+) cations into the organic phase is permitted by ion exchange of the TEA(+) cations for protons contained in the DPPA molecules, followed by re-exchange permitting the release of the TEA(+) cations into the organic phase. The principal steps of the reaction mechanism are the transport of the TEA(+) cations through the layers of adsorbed DPPA and the slow re-exchange in the adsorbed layer. The cyclic voltammetry experiments permit semiquantitative estimation of the appropriate kinetic and thermodynamic constants describing the process.
Permanent Link: http://hdl.handle.net/11104/0184255