Cation binding properties of an anionic gemini surfactant monolayer

Rehman, Jeveria; Ponce, Concepcion P.; Araghi, Hessamaddin Younesi; Paige, Matthew F.

doi:10.1016/j.colsurfa.2017.03.039

Cited by 9 publications

(19 citation statements)

References 26 publications

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“…The derived experimental data were explained in terms of a new model based on the Frumkin adsorption isotherm and the Ward-Tordai diffusion, which allowed us to explain the surfactants surface active behavior at the initial stages of the dynamic adsorption process at the air-water interface in terms of a cooperative adsorption process, in contrast to many previous works 21,22,27,50,60,61 . In addition, positive values of lateral interactions indicate a high stability of the surfactant monolayer formed at the interface [62][63][64][65] .…”

Section: Discussionmentioning

confidence: 99%

Micellization thermodynamic behavior of gemini cationic surfactants. Modeling its adsorption at air/water interface

Domínguez-Arca

Sabín

Taboada

et al. 2020

Journal of Molecular Liquids

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Self-assembly structures of gemini surfactants are characterized, among others, for their low CMC. This characteristic could be due to great hydrophobic parts in their molecular structures. That availability could imply great stability of selfassembly structures or monolayers absorbed in an interface.The micellization behavior of two cationic gemini surfactants, α,ω-bis(S-alkyl dimethylammonium) alkane bromides, were studied by a modelization of dynamic surface tension (DST) experimental data and isothermal titration calorimetry (ITC) measurements. The adsorption data at the air/water interface was taken through the analysis of the profile changes of a pendant drop. The thermodynamic characterization of the micellization process of the gemini surfactants was carried out using ITC. A model based on the Frumkin adsorption isotherm and the Ward-Tordai diffusion equation was developed to obtain the characteristic parameters of the adsorption without the need of using the Gibbs adsorption equation. Positive values of lateral interaction show good stability of the adsorbed monolayer. The ITC data were analyzed following a novel protocol based on the identification of the different energetic contributions and regimens observed in the titration enthalpograms from demicellization processes. The presence of exothermic peaks would explain the low values of CMC.

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Section: Discussionmentioning

confidence: 99%

Micellization thermodynamic behavior of gemini cationic surfactants. Modeling its adsorption at air/water interface

Domínguez-Arca

Sabín

Taboada

et al. 2020

Journal of Molecular Liquids

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“…The newly developed anionic gemini surfactants of the N, N, N′, N′‐dialkyl‐N, N′‐diacetate ethylenediamine family, dubbed Ace(n)‐m‐Ace(n) in the literature, have demonstrated the ability to associate with inorganic metal ions in bulk solution and in monolayer films at the air–water interface (Lv et al, 2014; Lv and Qiao, 2015; Rehman et al, 2017a; Wattebled and Laschewsky, 2007). A representative example of these compounds, Ace(18)‐2‐Ace(18), is shown in Scheme 1.…”

Section: Introductionmentioning

confidence: 99%

“…For comparison, a monomeric surfactant reference compound, sodium laurate, precipitated out of solution at ion concentrations that were several orders of magnitude lower. Research on ion association in our group has focused on Langmuir and Langmuir Blodgett (LB) monolayers in which we reported on the effect of subphase Na + and Ca 2+ on Ace(12)‐2‐Ace(12) monolayer properties, including basic pressure area (π‐A) isotherm characteristics as well as film structure at air–water and air–solid interfaces (Rehman et al, 2017a). The presence of either cation in the subphase resulted in the significant expansion of the monolayer film in comparison with an ion‐free subphase, with Ca 2+ inducing a greater film expansion than Na + .…”

Section: Introductionmentioning

confidence: 99%

Iron Binding in an Ethylenediaminetetracetic Acid‐Based Gemini Surfactant Monolayer Film

Sowah-Kuma

Rehman

Yeboah

et al. 2021

J Surfact & Detergents

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The ability of Fe3+ to bind to Langmuir monolayers of an N, N, N′, N′‐dialkyl‐N, N′‐diacetate ethylenediamine gemini surfactant has been explored. Fe3+ in the subphase resulted in the formation of compacted, liquid‐phase monolayers with a mesh‐like morphology at the micron length scale in comparison with expanded, unstructured liquid‐phase monolayers in the absence of iron. The response of the monolayer to subphase Fe3+ was different from that reported for Na+ and Ca2+ for an affiliated, shorter‐tail gemini surfactant. Combined surface potential and X‐ray reflectivity measurements indicated that Fe3+ induced minor conformational changes in the monolayer, suggesting ionic association with the head group. Direct evidence for the binding of iron was provided by total reflection X‐ray fluorescence measurements, which revealed that multiple ions were associated with each head group as opposed to chelating with 1:1 stoichiometry as observed with bulk ethylenediaminetetracetic acid. Cumulative data suggest the adsorption of Fex(OH)y(3x−y)+ complexes with the monolayer surface as has been reported with other charged and uncharged monolayers.

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“…A number of studies have focused on the synthesis of Gemini surfactants with diamine as the spacer and carboxylate as the headgroup in the same molecule (Lv et al, ; Onitsuka et al, ). Some Gemini surfactants possess amide groups between the hydrocarbon chain and the carboxyl headgroup (Kunieda et al, ; Rehman et al, ; Tsubone et al, ; Yoshimura and Esumi, ). These Gemini surfactants are able to achieve lower surface tensions in smaller critical micelle concentrations comparing with the corresponding monomeric surfactants, while having better wetting, emulsifying and foam properties.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Properties of pH‐Dependent Gemini Surfactants Containing Multiple Carboxyl Groups

Qiao

et al. 2020

J Surfact & Detergents

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A series of Gemini surfactants N,N″‐dialkyl‐N,N′,N″‐tripropionate diethylenetriamine (referred as DTPDT‐n, where n is the length of the hydrocarbon chain, n = 10, 12, 14) were synthesized, which have three carboxylic head‐groups and two hydrophobic alkane chains. The products were characterized by means of nuclear magnetic resonance and mass spectrometry. The physicochemical properties of DTPDT‐n surfactants with different hydrocarbon chain lengths were studied such as isoelectric point, surface activities, emulsifying properties, and foam properties. It is showed that these compounds exhibit pH‐dependent protonation‐deprotonation behavior. The isoelectric points of DTPDT‐n surfactants are between 3.40 and 10.90. The critical micellar concentration (cmc) of all three surfactants are lower than the corresponding monomeric surfactants (single head group, single‐chain), especially DTPDT‐14, whose cmc can reach 2.29 × 10−5 mol/L. With an increase in the length of the alkyl chain, the solubility of the surfactants decreases and the surface tension of the three surfactants at cmc increases. In consideration of pH, all of three surfactants appear better emulsifying capacity and foaming property under weak alkaline conditions. DTPDT‐14 has the best performance of emulsifying capacity among the three surfactants. DTPDT‐10 has excellent foaming ability and foam stability.

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Cation binding properties of an anionic gemini surfactant monolayer

Cited by 9 publications

References 26 publications

Micellization thermodynamic behavior of gemini cationic surfactants. Modeling its adsorption at air/water interface

Micellization thermodynamic behavior of gemini cationic surfactants. Modeling its adsorption at air/water interface

Iron Binding in an Ethylenediaminetetracetic Acid‐Based Gemini Surfactant Monolayer Film

Synthesis and Properties of pH‐Dependent Gemini Surfactants Containing Multiple Carboxyl Groups

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