Apparent molar volume, apparent molar adiabatic compressibility, and solubilization studies of aqueous solutions of sodium p-(n-dodecyl)benzenesulfonate as a function of surfactant and solubilizate concentrations and temperature

Alauddin, M.; Rao, N. Kameswara; Verrall, R. E.

doi:10.1021/j100316a057

Cited by 38 publications

(31 citation statements)

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“…1 from which it follows that in an aqueous solution of gelatin at different temperatures, it was not possible to estimate the infinite dilution values of the apparent molar volume (φ 0 v ) by fitting the data to the relation, φ v = φ 0 v + bm 1/2 which is a characteristic feature of normal electrolytes. A similar observation has been reported by Verral et al [19] for sodium dodecylbenzene sulfate (SDBS) in aqueous solution. Rather, the φ v dependence on the surfactant concentration exhibits a complex pattern especially at low concentrations [<(2 to 3) mmol · kg −1 ].…”

Section: Resultssupporting

confidence: 86%

Sound Speed and Density Studies of Interactions Between Cationic Surfactants and Aqueous Gelatin Solution

Chauhan

et al. 2012

Int J Thermophys

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Studies on the interactions of surfactants with proteins can contribute to an understanding of the action of surfactants as denaturants and as solubilizing agents for membranes of proteins and lipids. Quantitative aspects of such studies may include direct measurements of properties, such as viscosity, density, sound speed, conductance, and elucidation of the often highly complex phase diagrams. In this study, sound speed and density studies of surfactants, viz., cetyltrimethyl ammonium bromide, cetyltrimethyl ammonium chloride, and di(dodecydimethyl ammonium bromide) (12-2-12) have been carried out in a 0.02 % w/v aqueous solution of gelatin at temperatures of 20 • C, 25 • C, 30 • C, and 35 • C. From the measured data, the parameters apparent molar volumes (φ v ), adiabatic compressibility (β), and apparent molar compressibility (φ k ) have been calculated to interpret the protein-surfactant interactions. The variations in these parameters with the concentration of the surfactant suggests the manifestation of hydrophobic interactions in the system.

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Section: Resultssupporting

confidence: 86%

Sound Speed and Density Studies of Interactions Between Cationic Surfactants and Aqueous Gelatin Solution

Chauhan

et al. 2012

Int J Thermophys

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“…Ultrasonic velocities were measured as previously described (30). The following equation was used to calculate the sound speed, u, in…”

Section: Apparatus and Proceduresmentioning

confidence: 99%

Apparent molar volume and adiabatic compressibility studies of aqueous solutions of some drug compounds at 25 °C

Iqbal¹,

Verrall²

1989

Can. J. Chem.

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101

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MOHAMMAD IQBAL and R. E. VERRALL. Can. J. Chem. 67, 727 (1989). Apparent molar adiabatic compressibilities and volumes of aqueous solutions of the following drugs (sodium salicylate, methyl orange, L-tryptophan, phenol, and the hydrochloride salts of propranalol, procaine, pilocarpene, and ephedrine) have been calculated from high precision density and sound velocity measurements at 25°C. These drugs are considered important in several biochemical phenomena such as anomalous protein binding, anesthesia, or unique structure-activity relationship and this study is part of a comprehensive investigation of drug-protein interactions in biological systems. The data are qualitatively interpreted in terms of solute-solvent and solute-solute interactions. Some plausible modes of drug hydration are discussed with particular reference to the structure of the drug molecules. The adiabatic compressibility shows a strong correlation with the hydrational behaviour of the solute molecule and appears to be sensitive to the structural features of the solute, such as shape, size, branching, and presence of aromatic rings. It is argued that these aspects are important in terms of considering the geometrical fit of the solute into the ordered form of the aqueous solvent surrounding these solutes.Key words: apparent molar adiabatic compressibilities, apparent molar volumes, hydration of drugs.MOHAMMAD IQBAL et R. E. VERRALL. Can. J. Chem. 67, 727 (1989). Utilisant des mesures de haute prtcision de la densitt ainsi que de la vitesse du son, a 25"C, on a calculC les volumes et les compressibilitCs molaires apparentes de solutions aqueuses des drogues suivantes: salicylate de mCthyle, orange de mtthyle, L-tryptophane, phCnol ainsi que les chlorhydrates de la propanolamine, de la procaine, du piloc&ne et de 1'CphCdrine. Ces drogues sont souvent considCrtes comme importantes dans plusieurs phenomknes biochimiques tels que la liaison anormale des protkines, I'anesthCsie ou une relation structure-activitC particulikre; cette ttude a Ct C rCalisCe dans le cadre d'un examen gtntral des interactions drogues-protCines dans des systkmes biologiques. Qualitativement, on interprkte ces donnees en fonction d'interactions solute-solvant et solutC-solute. On discute de quelques modes plausibles pour l'hydratation des drogues et en particulier la structure des drogues. I1 existe une importante corrtlation entre les compressibilitCs adiabatiques et les possibilitts d'hydratation des moltcules en solution vis-a-vis de I'hydratation; de plus, elles semblent Stre sensibles aux caractkristiques structurales du solutt, comme la forme, la grosseur, les ramifications et la presence de noyaux aromatiques. On suggkre que ces aspects sont importants lorsqu'on veut insCrer ces solutCs dans la forme ordonnte du solvant aqueux qui entoure ces solutCs.

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“…The opposite behavior is detected for the OS 20-NicA-water sys tem. The values of increase with temperature for the systems studied, indicating that an increase of temperature favors micellization [21]. Negative values of indicate that aggregation of NicA and surfac tants is an exothermic processes.…”

Section: Effect Of Nica On Micellization Of Surfactants In Aqueous Somentioning

confidence: 90%

Effect of nicotinic acid on micellization and viscosity of surfactants in aqueous solutions

2015

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The effect of nicotinic acid on critical micelle concentration (CMC) and viscosity of sodium dodecyl sulfate, cetylpyridinium bromide, and hexadecyl poly[oxyethylene(20)] alcohol solutions is studied. The values of CMC and micelle ionization degree are obtained. The thermodynamic parameters of micelli zation are determined. The values of Jones-Dole coefficients are determined based on the results of viscosity measurements.

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Apparent molar volume, apparent molar adiabatic compressibility, and solubilization studies of aqueous solutions of sodium p-(n-dodecyl)benzenesulfonate as a function of surfactant and solubilizate concentrations and temperature

Cited by 38 publications

References 0 publications

Sound Speed and Density Studies of Interactions Between Cationic Surfactants and Aqueous Gelatin Solution

Sound Speed and Density Studies of Interactions Between Cationic Surfactants and Aqueous Gelatin Solution

Apparent molar volume and adiabatic compressibility studies of aqueous solutions of some drug compounds at 25 °C

Effect of nicotinic acid on micellization and viscosity of surfactants in aqueous solutions

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