Effect of aliphatic alcohols and aliphatic carboxylic acids on the critical micelle concentration and counter-ion binding degree of sodium dodecylsulfate

Loginova, Lidia P.; Yakovleva, E. Yu.; Galat, Marina N.; Boichenko, Alexander P.

doi:10.1016/j.molliq.2008.05.009

Cited by 18 publications

(14 citation statements)

References 18 publications

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“…Although numerous studies on the effects of additives of varied natures on micellization have been reported in the literature [17,[19][20][21][22][23][24][25][26], relatively very few studies are available on the effect of amino acids/peptide on the micellization of SDS at different temperatures. The conductometric technique has been found to be highly useful for studying the solution behavior of various systems, including surfactants [6,20,25,[27][28][29][30].…”

Section: Introductionmentioning

confidence: 99%

Studies on the Effect of Amino Acids/Peptide on Micellization of SDS at Different Temperatures

Ali

Ansari

2010

J Surfact & Detergents

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Conductivities of (0.001-0.012) m sodium dodecyl sulfate have been determined in water and in the presence of 0.10 m aqueous glycine/alanine/glycylglycine at 298.15, 303.15, 308.15, and 313.15 K. From the specific conductivity data, the critical micellar concentration, degree of counter ion association, degree of counterion dissociation, free energy of transfer of hydrophobic chain from the medium to interior of the micelle, and surface contribution, standard free energy of micellization, standard enthalpy of micellization, and standard entropy of micellization of sodium dodecyl sulfate have been computed. The thermodynamic parameters of micellization and the effect of additives on these parameters have been used to study the interactions present in the micellar systems.

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Section: Introductionmentioning

confidence: 99%

Studies on the Effect of Amino Acids/Peptide on Micellization of SDS at Different Temperatures

Ali

Ansari

2010

J Surfact & Detergents

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“…In addition, control An additional factor, to explain our results and the difference between aryl and aliphatic alcohols, in a perspective of micelle formation, could also be that aryl alcohols usually present a lower critical micelle concentration than aliphatic species 71 and this could help to explain their higher reactivity under our conditions and the presence of relatively larger amounts of disproportionation product in our biphasic system. For the specific case of Rh/Al 2 O 3 though, a large excess of water could promote the formation of -Al(OH) 3 .…”

Section: Catalytic Tests For Benzyl Alcohol 1-octanol and 3-octanol mentioning

confidence: 90%

Water as a catalytic switch in the oxidation of aryl alcohols by polymer incarcerated rhodium nanoparticles

Weston

Miyamura

Yasukawa

et al. 2017

Catal. Sci. Technol.

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One of the major goals in the oxidation of organic substrates, and especially for alcohol oxidation, is the use of molecular oxygen as the oxidant under mild conditions. Here we report the synthesis and testing of Rh polymer incarcerated catalysts, using a metal so far not used for alcohol oxidation reactions, in which the catalytic activity towards aryl alcohol oxidation, for substrates like 1-phenylethanol and benzyl alcohol, is switched on by the addition of water as co-solvent in toluene. This is done by using air as oxidant at atmospheric pressure, in one of the mildest reaction conditions reported for this class of reaction. The promoting effect of water to higher conversions was observed also for rhodium over alumina supported catalysts, which were used as a benchmark allowing in all cases high conversion and selectivity to the ketone or the aldehyde within a short reaction time. The effect of water was explained as a medium capable to promote the oxidation of the alcohol to the ketone in a biphasic system assisted by phase transfer catalysis. This is particularly relevant for alcohols like 1-phenylethanol or benzyl alcohol that are not soluble in water at room temperature, and for which alternative oxidation routes are needed, as well as to switch on the catalytic activity of metal nanoparticles in a facile and green manner for the activation of molecular oxygen. Aliphatic alcohols like 1-octanol and 3-octanol were also tested, still showing Rh based catalysts as promising materials for this reaction if toluene only was used as solvent instead.2

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“…Its cost is low, it is available in very high purity and it has a low critical micelle concentration (CMC = 8 × 10 −3 M) [2,32] and low Kraft point of 12 • C [33,34] associated to a high solubility in water. Moreover, the viscosities of aqueous SDS solutions with concentrations up to 0.3-0.4 M are appropriate for common HPLC pumps [5].…”

Section: Experimental Design and Selection Of Experimental Conditionsmentioning

confidence: 99%

“…The CMC, degree of counter-ions binding, shape and size of micelles, internal viscosity and adsorption on the stationary phase are all significantly modified [6,13,[32][33][34][35][36][37][38]. As a consequence the solute-micelle and solute stationary phase interactions are affected.…”

Section: Additive Effects On Micellar Solutions Of Sdsmentioning

confidence: 99%

Aliphatic carboxylic acids and alcohols as efficiency and elution strength enhancers in micellar liquid chromatography

Boichenko

Berthod

2010

Journal of Chromatography A

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Effect of aliphatic alcohols and aliphatic carboxylic acids on the critical micelle concentration and counter-ion binding degree of sodium dodecylsulfate

Cited by 18 publications

References 18 publications

Studies on the Effect of Amino Acids/Peptide on Micellization of SDS at Different Temperatures

Studies on the Effect of Amino Acids/Peptide on Micellization of SDS at Different Temperatures

Water as a catalytic switch in the oxidation of aryl alcohols by polymer incarcerated rhodium nanoparticles

Aliphatic carboxylic acids and alcohols as efficiency and elution strength enhancers in micellar liquid chromatography

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