6533b85afe1ef96bd12b98ac
RESEARCH PRODUCT
Analysis of adsorption of phospholipids at the 1,2-dichloroethane/water interface by electrochemical impedance spectroscopy: A study of the effect of the saturated alkyl chain
Magda MartinsCarlos M. PereiraR. DabirianVladimir García-moralesFrancisco SilvaJosé A. ManzanaresHélder A. Santossubject
chemistry.chemical_classificationChemistryGeneral Chemical EngineeringPhospholipid adsorptionPhospholipidAnalytical chemistryLiquid-liquid interfaceCapacitanceAnalytical ChemistryDielectric spectroscopyDichloroethanechemistry.chemical_compoundAdsorptionInterfacial capacitancePhosphatidylcholineElectrochemistrylipids (amino acids peptides and proteins)ITIESElectrochemical impedance spectroscopyAlkyldescription
Abstract The adsorption behaviour of a series of phosphatidylcholines (PCs) with saturated carbon chains of different length (DLPC, DPPC, DSPC, DAPC, and DBPC) at the electrified 1,2-dichloroethane/water interface was studied by measuring electrochemical impedance spectroscopy at the polarized interface. Two different trends in the interfacial capacitance were observed for any of the PCs the capacity dependence on the applied potential: strong adsorption occurs at negative potential with a marked decrease of C ( E ); increase of capacity is observed at positive potentials. It is demonstrated that the interfacial lipid adsorption was dependent on phospholipid concentration, applied potential, and phospholipid chain length. The potential and concentration dependence of the interfacial capacitance in the presence of these phospholipids were successfully described by a model based on the solution of the Poisson–Boltzmann equation in the interfacial region.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2007-01-15 |