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

• Type: Article in International Scientific Journal
• Date: 2007

Authors

Martins, MC (Author) Other; Pereira, CM (Author) FCUP; Santos, HA (Author) Other; Dabirian, R (Author) Other; Silva, F (Author) FCUP; Garcia Morales, V (Author) Other; Manzanares, JA (Author) Other

Journal

The Journal is awaiting validation by the Administrative Services.

Title: JOURNAL OF ELECTROANALYTICAL CHEMISTRY

Vol. 599

Pages: 367-375

ISSN: 0022-0728

Indexing

ISI Web of Knowledge - 13 Citations

Scopus - 13 Citations

Scientific classification

FOS: Natural sciences > Chemical sciences

Other information

Authenticus ID: P-004-C89

DOI: 10.1016/j.jelechem.2006.07.022

Abstract (EN): 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.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 9