A nuclear magnetic resonance investigation of the micellar properties of two-headed surfactant systems: the disodium 4-alkyl-3-sulfonatosuccinates. 1. Equilibrium micellar properties

Boucher, Gregory D.; MacDonald, Aaron C.; Hawrylak, Brent; Marangoni, D. Gerrard

doi:10.1139/cjc-76-9-1266

Cited by 4 publications

(4 citation statements)

References 3 publications

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“…The order parameter profiles and the values for C 8 SS are substantially different for the headgroup carbons of the sulfosuccinates than for a typical single-headed, single-tailed surfactant. These high S values and the values are consistent with the motions of the headgroup carbons in these micelles being more restricted than in the case of a typical surfactant like DTAB or SDS. , These values are even larger than the S values and the values found for a zwitterionic surfactant ((decyldimethylammonio)propanesulfonate) by Jansson et al This is in excellent agreement with what we observed for the 13 C chemical shift changes upon micelle formation for the sulfosuccinates previously …”

Section: Resultssupporting

confidence: 92%

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Nuclear Magnetic Resonance Investigation of the Micellar Properties of Two-Headed Surfactant Systems: The Disodium 4-Alkyl-3-sulfonatosuccinates. 2. The Dynamics of the Chains Comprising the Interior of Two-Headed Surfactant Micelles

Doyle

Marangoni

2004

Langmuir

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The dynamics of the carbons comprising the micelles of two members of the family of two-headed surfactants, the disodium 4-alkyl-3-sulfonatosuccinates, has been determined via the application of the two-step model to the 13C relaxation rates and the nuclear Overhauser enhancements (nOe's) at 200 MHz. The NMR relaxation times, determined from the inversion recovery method, increase steadily as we descend the chain from the headgroup region. The relaxation rate profiles and the order parameters have been calculated from the two-step model for the micellar sulfosuccinate aggregates. We note that the order parameter profile and the fast motion correlation time profile for these two-headed surfactants are distinctly different from those of a typical single-headed, single-tailed surfactant such as dodecyltrimethylammonium bromide, particularly in the headgroup region of the micelle. All these results are interpreted in terms of the effect of adding a second headgroup to a single-headed, single-tailed surfactant.

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Section: Resultssupporting

confidence: 92%

“…The synthesis of the sulfosuccinate surfactants has been described in detail previously . The purified surfactants were characterized by NMR and FT-IR spectroscopy and by a two phase surfactant titration.…”

Section: Methodsmentioning

confidence: 99%

Nuclear Magnetic Resonance Investigation of the Micellar Properties of Two-Headed Surfactant Systems: The Disodium 4-Alkyl-3-sulfonatosuccinates. 2. The Dynamics of the Chains Comprising the Interior of Two-Headed Surfactant Micelles

Doyle

Marangoni

2004

Langmuir

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“…Surfactant molecules can also self-assemble forming a micelle at a concentration known as the critical micelle concentration, or CMC value [5]. The evidence for the formation of micelles can be found in dramatic changes in physical properties at the CMC, such as NMR chemical shifts and relaxation rates [6][7][8][9][10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

A 1D‐ and 2D‐NMR Study of an Anionic Surfactant/Neutral Polymer Complex

Landry

Marangoni

Arden

et al. 2009

J Surfact & Detergents

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NMR chemical shifts and linewidth measurements were examined for mixtures of sodium 10-phenyldecanoate (Na x-PhDec) in deuterated aqueous solutions in the presence of varying compositions of poly(ethylene oxide) (PEO) polymers of 2000 and 4000 molecular weight. In addition, variable temperature NMR spectra and NMR spin lattice relaxation times (T 1 ) were obtained for the PEO-4000/Na x-PhDec system as a function of varying polymer concentrations. As expected, the polymer/surfactant systems exhibit the behaviour typical of that of an anionic surfactant/ neutral polymer system with well defined critical aggregation concentrations (CMC) corresponding to the formation of polymer/surfactant complexes below the CMC of the free surfactant. The 1 H-NMR linewidths acquired for the Na xPhDec/PEO-4000 system before and after the CMC region of the surfactant indicate that the maximum in the linewidth of the PEO proton peak is reached at approximately twice the CMC of the free surfactant. 2D-NMR NOESY measurements on this system exhibit cross peaks between the PEO protons and the protons on the surfactant backbone, consistent with the location of the phenyl group in the micellar interior. All these NMR experiments are interpreted in terms of the structure of the polymer/surfactant complexes as a function of the system composition.

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“…Solution preparation for the NMR experiments and the experiments themselves (measurement of C‐13 chemical shifts and diffusion coefficients) were carried out as described in previous publications (Boucher et al, 1998; Landry and Marangoni, 2008). All conductivity and NMR experiments were carried out at a single temperature, namely 298 K.…”

Section: Methodsmentioning

confidence: 99%

The Interaction of Glymes with Surfactant Micelles

Petropolis¹,

Petropolis²,

MacNeil³

et al. 2020

J Surfact & Detergents

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The critical micelle concentrations (CMC) values and counterion dissociation (α values) have been determined for a number of mixed micellar systems consisting of two typical ionic surfactants and glycol ethers (glymes) as cosurfactants, namely diethylene glycol dimethyl ether, diethylene glycol diethyl ether, triethylene glycol dimethyl ether, and tetraethylene glycol dimethyl ether. Conductance experiments were used to determine the CMC and α values of the mixed micelles as a function of glyme concentration in the aqueous mixed solvent. Favorable interactions between sodium dodecyl sulfate micelles and glyme cosurfactants were deduced from the decreases in the CMC values and the large increase in the α values of these systems as a function of increasing glyme concentration in the mixed solvents. In contrast to the anionic surfactant/glyme systems, in general, there appeared to be little favorable interactions between the surfactant and glymes when micelles of the cationic surfactant dodecyltrimethylammonium bromide were formed in water/ glyme solvent systems containing an increasing amount of the glymes. The interaction of glymes with the surfactant micelles was examined closely via 13 C nuclear magnetic resonance (NMR) chemical shifts for both surfactant and glyme carbons; these chemical shifts changes were interpreted in terms of the distribution and the localization of the glymes in the aggregates. Finally, partition constants, determined from two-dimensional diffusion-oriented spectroscopy (2D-DOSY) experiments, were used to calculate thermodynamic quantities of transfer of the glymes between the bulk phase and the self-assembled aggregates. All these results are interpreted in terms of the key contributions that both the glyme ethoxylated groups and alkyl endgroups make to the hydrophobic interactions.

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A nuclear magnetic resonance investigation of the micellar properties of two-headed surfactant systems: the disodium 4-alkyl-3-sulfonatosuccinates. 1. Equilibrium micellar properties

Cited by 4 publications

References 3 publications

Nuclear Magnetic Resonance Investigation of the Micellar Properties of Two-Headed Surfactant Systems: The Disodium 4-Alkyl-3-sulfonatosuccinates. 2. The Dynamics of the Chains Comprising the Interior of Two-Headed Surfactant Micelles

Nuclear Magnetic Resonance Investigation of the Micellar Properties of Two-Headed Surfactant Systems: The Disodium 4-Alkyl-3-sulfonatosuccinates. 2. The Dynamics of the Chains Comprising the Interior of Two-Headed Surfactant Micelles

A 1D‐ and 2D‐NMR Study of an Anionic Surfactant/Neutral Polymer Complex

The Interaction of Glymes with Surfactant Micelles

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