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Blocking Effect of a Phospholipid Monolayer on Ion Transfer at a Liquid | Liquid Interface and its Electrochemical Control
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SYSNO ASEP 0101076 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Ostatní články Title Blocking Effect of a Phospholipid Monolayer on Ion Transfer at a Liquid | Liquid Interface and its Electrochemical Control Title Blokovací efekt fosfolipidové monovrstvy na přenos iontů na kapalném rozhraní Author(s) Maeda, K. (JP)
Yoshida, Y. (JP)
Goto, T. (JP)
Mareček, Vladimír (UFCH-W) RIDSource Title Journal of the Electroanalytical Chemistry and Journal of Electroanalytical Chemistry and Interfacial Electrochemistry. - : Elsevier - ISSN 0022-0728
Roč. 567, 1/2 (2004), s. 317-323Number of pages 7 s. Language eng - English Country CH - Switzerland Keywords liquid | liquid interface ; phospholipid monolayer ; ion transfer voltammetry Subject RIV CG - Electrochemistry R&D Projects ME 510 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) CEZ AV0Z4040901 - UFCH-W Annotation The transfer of K+ facilitated by dibenzo-18-crown-6 was examined voltammetrically at an interface between water containing La3+, Eu3+ or Yb3+ and 1,2-dichloroethane, DCE, containing distearoyl L- alpha -phosphatidylcholine, DSPC. The reversible wave for the transfer of K+ from water to DCE vanished owing to the formation of a compact layer at the interface, which was caused by the complex formation of lanthanide ion with DSPC monolayer. The blocking effect was enhanced in the order of La3+ < Eu3+ < Yb3+. The complex formation constants were approximately evaluated based on the decrease of voltammetric current. The inhibition of reversible wave was accompanied by the appearance of a new voltammetric peak at more positive potentials for the restoration of K+ transfer corresponding to the destruction of the compact layer. The peak potential of the new wave shifts positively with an increase of pH and the concentration of lanthanide ion. Workplace J. Heyrovsky Institute of Physical Chemistry Contact Michaela Knapová, michaela.knapova@jh-inst.cas.cz, Tel.: 266 053 196 Year of Publishing 2005
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