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Multivariate Data Analysis for Enhanced Interpretation of Electrochemical Impedance Spectra of Gramicidin-Ion Interactions in Phospholipid Monolayers
Umeå universitet, Teknisk-naturvetenskapliga fakulteten, Kemiska institutionen.
Vise andre og tillknytning
2007 (engelsk)Inngår i: Langmuir, Vol. 23, nr 9, s. 5029-32Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

This article describes a multifrequency electrochemical impedance study of phospholipid monolayers on a mercury drop electrode in solutions containing electrolytes and gramicidin derivatives: gramicidin A (gA), gramicidin-BOC (g-BOC), and desformylgramicidin (g-des). The impedance spectra have been studied individually (univariate approach) and also transformed using a multivariate data reduction method (multivariate approach). It was shown that the two approaches are complementary. Thus the formation of K+-conducting channels is observed in gA only, and these channels can be distinguished from an interaction of all gramicidin derivatives with Mg2+. An unknown peptide interaction in the monolayer was observed on a slow time scale.

sted, utgiver, år, opplag, sider
2007. Vol. 23, nr 9, s. 5029-32
Identifikatorer
URN: urn:nbn:se:umu:diva-14455DOI: 10.1021/la062850jOAI: oai:DiVA.org:umu-14455DiVA, id: diva2:154126
Tilgjengelig fra: 2007-06-04 Laget: 2007-06-04 Sist oppdatert: 2018-06-09bibliografisk kontrollert

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