Dynamics, order, and molecular conformation of micellar zwitterionic (decyldimethylammonio)propane sulfonate

Jansson, Mikael; Li, Puyong; Stilbs, Peter

doi:10.1021/j100304a029

Cited by 18 publications

(16 citation statements)

References 1 publication

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“…61,62 Upfield shift for C 12 of SDS in 100% methanol agreed with those of hexanol and octanol. 66 In Table 5, the DLS results for the self-assemblies of SDS formed in Dn−W and Ml−W media along with their critical packing parameter (P c ) and N agg are presented. Both the assembly size (hydrodynamic radius, R H ) and N agg decreased with increasing volume percentage of Dn and Ml.…”

Section: Na Ds Ds Ds Na Ds (Triple Ion)mentioning

confidence: 99%

Amphiphile Behavior in Mixed Solvent Media I: Self-Aggregation and Ion Association of Sodium Dodecylsulfate in 1,4-Dioxane–Water and Methanol–Water Media

et al. 2012

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Mixed aquo-organic solvents are used in chemical, industrial, and pharmaceutical processes along with amphiphilic materials. Their fundamental studies with reference to bulk and interfacial phenomena are thus considered to be important, but such detailed studies are limited. In this work, the interfacial adsorption of sodium dodecylsulfate (SDS, C12H25SO4(-)Na(+)) in dioxane-water (Dn-W) and methanol-water (Ml-W) media in extensive mixing ratios along with its bulk behavior have been investigated. The solvent-composition-dependent properties have been identified, and their quantifications have been attempted. The SDS micellization has been assessed in terms of different solvent parameters, and the possible formation of an ion pair and triple ion of the colloidal electrolyte, C12H25SO4(-)Na(+) in the Dn-W medium has been correlated and quantified. In the Ml-W medium at a high volume percent of Ml, the SDS amphiphile formed special associated species instead of ion association. The formation of self-assembly and the energetics of SDS in the mixed solvent media have been determined and assessed using conductometry, calorimetry, tensiometry, viscometry, NMR, and DLS methods. The detailed study undertaken herein with respect to the behavior of SDS in the mixed aquo-organic solvent media (Dn-W and Ml-W) is a new kind of endeavor.

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Section: Na Ds Ds Ds Na Ds (Triple Ion)mentioning

confidence: 99%

Amphiphile Behavior in Mixed Solvent Media I: Self-Aggregation and Ion Association of Sodium Dodecylsulfate in 1,4-Dioxane–Water and Methanol–Water Media

et al. 2012

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“…The zwitterionic surfactant (decy1dimethylammonio)propyl sulphate (DAPS) has a bulky head group and shows a similar behaviour. 26 The effect has been ascribed by Jansson et ~1 .~~ to motional constraints caused by anchoring of the head group to the interface. The value of S for C-2 of OAXS is large (0.38), which implies a very high degree of ordering.…”

Section: Branched Alkylbenzenesulphonates (Sphic10 and Oaxs)mentioning

confidence: 97%

“…26 that a 'high-frequency nucleus' such as carbon is inherently insensitive to the slower motions of the micelle. The explanation for this insensitivity arises from the spectral density terms in the expression for R,, where the highfrequency term predominates.…”

Section: J(w)mentioning

confidence: 99%

NMR relaxation and ESR spin probe studies of some surfactant micelles

Bratt

Gillies

Krebber

et al. 1992

Magnetic Reson in Chemistry

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Multi-frequency relaxation studies combined with the 'two-step' and 'three-step' models for molecular motion have been applied to a range of anionic surfactant molecules. From the internal dynamic parameters (q and S) conclusions have been drawn about the dependence of surfactant molecular dynamics inside micelles on molecular structure, and two unusual conformations have been identified. Slow correlation time (2,) data have also been obtained for these compounds. Three deuteriated surfactant molecules were subjected to the 'three-step' model and data are presented showing how the dimensions of the non-spherical micelles vary with temperature. An ESR spin probe study has been carried out on the compounds giving probe rotational correlation times at various temperatures. Information on alkyl chain packing at or near the water/micelle interface can be obtained from the derived thermodynamic parameters.

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“…As the hydrophilic head groups are "anchored" at the micellar surface", NMR-studies show that the mobility and the order parameter decreases along the alkyl tail from its end towards the head group [379][380][381][382][383][384][385].…”

Section: Dynamic Propertiesmentioning

confidence: 99%

Molecular concepts, self-organisation and properties of polysoaps

Laschewsky

Polysoaps/Stabilizers/Nitrogen-15 NMR

223

126

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The article reviews water-soluble polymers characterized by surfactant side chains, and related amphiphilic polymers. Various synthetic approaches are presented, and rules for useful molecular architectures are given. Models for the self-organization of such polymers in water are presented comparing them with the micellization of low molecular weight surfactants. Highlighting key properties of aqueous polysoap solutions such as viscosity, surface tension and solubilization power, some structure-property relationships are established. Further, the formation of mesophases and of superstructures in bulk is addressed. Finally, the functionalization of polysoaps, and potential applications are discussed.

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Dynamics, order, and molecular conformation of micellar zwitterionic (decyldimethylammonio)propane sulfonate

Cited by 18 publications

References 1 publication

Amphiphile Behavior in Mixed Solvent Media I: Self-Aggregation and Ion Association of Sodium Dodecylsulfate in 1,4-Dioxane–Water and Methanol–Water Media

Amphiphile Behavior in Mixed Solvent Media I: Self-Aggregation and Ion Association of Sodium Dodecylsulfate in 1,4-Dioxane–Water and Methanol–Water Media

NMR relaxation and ESR spin probe studies of some surfactant micelles

Molecular concepts, self-organisation and properties of polysoaps

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