A study of the interaction between dialkyldimethylammonium bromides and tri-n-octylphosphine oxide (topo) in mixed monolayers at the air/water interface

Hąc-Wydro, Katarzyna; Wydro, Paweł; Dynarowicz-Łątka, Patrycja

doi:10.1016/j.jcis.2004.05.014

Cited by 7 publications

(5 citation statements)

References 33 publications

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“…Beyond Xpeptide = 0.3, negative ΔGexc and ΔGmix values were observed, suggesting greater attractive interactions between the molecules in the mixed film in comparison to the ideal behaviour and higher thermodynamic stability than in unmixed films. Similar results showing simultaneous positive and negative deviations from the ideal behaviour were obtained by Hac-Wydro et al [45].…”

Section: Excess Propertiessupporting

confidence: 88%

Study of the interaction of GB virus C/Hepatitis G virus fusion peptides belonging to the E2 protein with phospholipid Langmuir monolayers

Pérez-López

Espina

Gómara

et al. 2017

Colloids and Surfaces B: Biointerfaces

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In order to determine the ability of 1,2-dipalmitoyl phosphatidylcholine (DPPC) and 1,2-dioleoyl phosphatidylglycerol (DOPG) to host peptide sequences belonging to the E2 protein of GBV virus C/Hepatitis G virus, the behaviour of Langmuir monolayers formed by these phospholipids and E2 (12-26), E2 (354-363) and E2 (chimeric) peptide sequences was analysed from data of surface pressure (π) versus area per molecule (A) isotherms, compression modulus (C), excess Gibbs energy of mixing (ΔG) and total Gibbs energy of mixing (ΔG). Three different behaviours were observed. Mixed films of E2 (12-26) with DPPC or DOPC showed negative values for the excess thermodynamic functions, and thus attractive interactions between mixed films components are greater than in ideal films. Mixtures of E2 (354-363) with DPPC or DOPG, exhibited positive values of excess functions, evidencing weaker interactions in the mixed films in relation to those of pure components. Finally, positive and negative excess functions were observed in E2 (chimeric)/DPPC or DOPG mixed films, depending on their composition. In short, the interaction between the phospholipids used in this work as models of cell membranes and E2 peptides varies with the type of phospholipid and the nature of the peptide (size, bulky, hydrophobicity and electric charge).

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Section: Excess Propertiessupporting

confidence: 88%

Study of the interaction of GB virus C/Hepatitis G virus fusion peptides belonging to the E2 protein with phospholipid Langmuir monolayers

Pérez-López

Espina

Gómara

et al. 2017

Colloids and Surfaces B: Biointerfaces

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“…The analysis of Langmuir monolayers formed by dialkyldimethylammonium salts has already been presented in our former paper [26]. Based on the compression modulus values (defined as C −1 s = −A(dπ/dA) [27]), it was found that DTDAB and DHDAB form monolayers of a liquid type.…”

Section: Resultsmentioning

confidence: 99%

“…5 min in order to ensure complete evaporation of the solvent before compression was initiated. Since no influence of the compression velocity (within the range 25-75 cm 2 /min) was found for the investigated compounds [26], in all the experiments monolayers were compressed at 50 cm 2 /min. All experiments were repeated twice to ensure consistent results.…”

Section: Methodsmentioning

confidence: 99%

Interactions between dialkyldimethylammonium bromides (DXDAB) and sterols—a monolayer study

Hąc-Wydro¹,

Wydro²,

Dynarowicz-Łątka³

2005

Journal of Colloid and Interface Science

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“…It is, therefore, interesting to relate the structure of surfactants to their properties, such as their ability to reduce surface tension or to form micelles. Extensive studies have been made to find a correlation between the structure of the cationic surfactants and their surface properties [13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Surface Properties Study of a Series of Cationic Surfactants with Different Hydrophobic Chain Lengths

Badache

Lehanine

Abderrahmane

2012

J Surfact & Detergents

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A series of three cationic surfactants with different chain lengths, i.e. O‐decyl‐, O‐dodecyl‐ and O‐tetradecyl‐N,N′‐diisopropylisourea hydrochloride were synthesized. The chemical structures of the prepared compounds were confirmed using chemical analysis, Fourier transform infra red spectroscopy and nuclear magnetic resonance spectra and chromatography coupled with mass spectrometry. Several surface properties of the synthesized surfactants were studied in aqueous solution. Surface tension, conductivity and the foaming power were measured and the critical micelle concentration (CMC) was determined at 25 °C. These results were correlated to the surfactant chemical structure. The surfactant that provided the best surface activity was the O‐dodecyl‐N,N′‐diisopropylisourea hydrochloride. The CMC was found to be significantly dependent on the hydrophobic chain length and decreased with increasing of the carbon number in the alkyl chain. The surfactants synthesized have an interesting foaming power. The surfactant with the longest alkyl chain exhibited the highest foamability.

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A study of the interaction between dialkyldimethylammonium bromides and tri-n-octylphosphine oxide (topo) in mixed monolayers at the air/water interface

Cited by 7 publications

References 33 publications

Study of the interaction of GB virus C/Hepatitis G virus fusion peptides belonging to the E2 protein with phospholipid Langmuir monolayers

Study of the interaction of GB virus C/Hepatitis G virus fusion peptides belonging to the E2 protein with phospholipid Langmuir monolayers

Interactions between dialkyldimethylammonium bromides (DXDAB) and sterols—a monolayer study

Synthesis and Surface Properties Study of a Series of Cationic Surfactants with Different Hydrophobic Chain Lengths

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