Cation adsorption at a distearoylphosphatidic acid layer adsorbed at a liquid/liquid interface

Interaction of chitosan and self‐assembled distearoylphosphatidic acid molecules at liquid/liquid and air/water interfaces. Effect of temperature

“…These responses are evidencing a blocking effect of the layer to cation transfer. According to previous results, TEA + is not able to be transferred to the organic phase, by permeation, across this highly structured DSPA film; instead, it irreversibly adsorbs at the negative polar head group of DSPA molecules. The presence of CHI in the aqueous phase does not improve the permeability of the film.…”

“…Electrochemical methods applied to an interface formed by two immiscible electrolyte solutions (aqueous phase/organic phase) modified by different films have been used in the last decades with the aim of developing new biomimetic membrane models. Therefore, the adsorption of lipid monolayer, proteins, or polyelectrolyte at liquid‐liquid interfaces has been studied by cyclic voltammetry, electrochemical impedance spectroscopy, and surface tension measurements. An area of special interest has been the study of the interaction between phospholipid monolayers and different cations, or peptides, as well as between polyelectrolytes with different ions and DNA .…”

“…With the aim of better characterizing the nature of the interaction between CHI and phospholipid monolayers, we analyze, in the present paper, the effect of CHI on a more compact monolayer, such as distearoylphosphatidic acid (DSPA) films formed at water/1,2‐dichloroethane or at air/water interfaces. Distearoylphosphatidic acid molecules adsorb at the liquid | liquid interface forming highly structured films, which produce a blocking effect on ion transfer, more important than that observed for DSPG monolayers . Therefore, it is interesting to analyze the ability of CHI to interact and penetrate such very compact films.…”

Promazine π-mers formation at a 1,2-dichloroethane/water interface

“…The choice of LiCl as the aqueous electrolyte is based on the fact that the blocking effect on transfer processes obtained under these conditions is very important [47]. It is well known that PZ derivatives modify the arrangement of lipidic molecules in a biomembrane, since they penetrate into lipidic structures due to their hydrophobic nature, disordering or forming small holes.…”

Potential-mediated interaction between dextran sulfate and negatively charged phospholipids films at air/water and liquid/liquid interfaces

“…In previous papers we have studied the incorporation of anxiolytic drugs into phospholipid monolayers adsorbed at liquid/liquid interfaces [31][32][33][34][35]. The results obtained have contributed to the knowledge of the non-specific interaction between these drugs and biological membranes components, which is particularly important because their accumulation in biomembranes alters the structural properties and leads to side effects.…”