Adsorption and ion-pairing interactions of phospholipids in the system of two immiscible electrolyte solutions. Part II: The formation and behaviour of a lecithin layer at the water/1,2-dichloroethane interface in the presence of multivalent anions in...
2007
Abstract
The present paper investigates voltammetrically the properties of the layers formed, whereas Part I of this series studied the electrochemical formation L-alpha-lecithin (dipalmitoyl, DPPC) adsorbed layers at the water/1,2-dichloroethane interfaces. These are primarily determined by ion pairing between the positively charged layer and the anions present on the aqueous side of the interface.
Cerium(IV) sulfate has been used as the source of the model anion and a five-step mechanism proposed for the formation and behaviour of DPPC layers. For the sake of comparison, the same experiments have been carried out with trimethyloctadecylammonium cation (TODA(+)) which have helped in elucidation of certain parts of the mechanism.