Adsorption and ion-pairing interactions of phospholipids in the system of two immiscible electrolyte solutions - Part III
Result description
The behaviour Of L-alpha-lecithin (DPPC) was studied at the water/1,2-dichloroethane interface within a range of interfacial potential differences below the zero-charge potential difference, using surface tension and voltammetric measurements. The general five-step model, established in Parts I and II of this series, has been confirmed. The surface pressure of DPPC adsorbed at the interface exhibits a maximum in acidic media close to the zero-charge potential difference, E-pzc, of the base electrolytes.It is demonstrated that, in contrast to the potentials higher than E-pzc, where the change in the surface pressure is due to desorption of the protonated form of DPPC, the observed change in the surface pressure at interfacial potential differences below E-pzc can be explained by alterations in the concentrations of the adsorbed zwitter-ionic and protonated forms of DPPC governed by the general acid/base equilibrium.
Keywords
liquid vertical bar liquid interfacessurface tensionadsorption of phospholipidsL-alpha-lecithin (DPPC)
The result's identifiers
Result code in IS VaVaI
Alternative codes found
RIV/61388955:_____/08:00309481
Result on the web
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DOI - Digital Object Identifier
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Alternative languages
Result language
angličtina
Original language name
Adsorption and ion-pairing interactions of phospholipids in the system of two immiscible electrolyte solutions - Part III
Original language description
The behaviour Of L-alpha-lecithin (DPPC) was studied at the water/1,2-dichloroethane interface within a range of interfacial potential differences below the zero-charge potential difference, using surface tension and voltammetric measurements. The general five-step model, established in Parts I and II of this series, has been confirmed. The surface pressure of DPPC adsorbed at the interface exhibits a maximum in acidic media close to the zero-charge potential difference, E-pzc, of the base electrolytes.It is demonstrated that, in contrast to the potentials higher than E-pzc, where the change in the surface pressure is due to desorption of the protonated form of DPPC, the observed change in the surface pressure at interfacial potential differences below E-pzc can be explained by alterations in the concentrations of the adsorbed zwitter-ionic and protonated forms of DPPC governed by the general acid/base equilibrium.
Czech name
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Czech description
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Classification
Type
Jx - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
CF - Physical chemistry and theoretical chemistry
OECD FORD branch
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Result continuities
Project
LC06063: Flurescence microscopy in biological and medical research
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2008
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Journal of electroanalytical chemistry
ISSN
1572-6657
e-ISSN
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Volume of the periodical
612
Issue of the periodical within the volume
2
Country of publishing house
NL - THE KINGDOM OF THE NETHERLANDS
Number of pages
5
Pages from-to
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UT code for WoS article
000252600400005
EID of the result in the Scopus database
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Basic information
Result type
Jx - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP
CF - Physical chemistry and theoretical chemistry
Year of implementation
2008