Effect of temperature on the partial molar volumes of some divalent transition metal sulphates and magnesium sulphate in the water-rich region of aqueous mixtures of ethylene glycol

Parmar, M. L.; Thakur, Raghbendra

doi:10.1016/j.molliq.2005.12.011

Cited by 24 publications

(8 citation statements)

References 13 publications

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“…A heterocyclic molecule with six-member nitrogen in it has been accounted as the breaker in H 2 O . The structure construction capability of Vit B 3 , perhaps attributable to the −CONH 2 functional group, conversely drifts in values, leading to the regular emergence of “caging/packing effect” by the perturbation of the structure. , An added positive value of δ 2 ϕ V 0 /δ T 2 advocates the dominance of hydrophobicity above electrostriction of aqueous β-CD. Therefore, maximum data of [δ 2 ϕ V 0 /δ T 2 ] for the hydroxyl + primary alcoholic + methyl + (water + β-CD) say about the existence of extra hydrophobicity in contrast to the amide in aqueous β-CD.…”

Section: Resultsmentioning

confidence: 99%

Synthesis, Characterization, and Comparison of Host–Guest Complexes of β-CD with Vitamins Explored through Their Biological Activities

et al. 2019

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Herein, inclusion complexation of host β-CD with guests, viz. nicotinamide and pyridoxine (two active forms of vitamins), in both aqueous medium and solid state has been explored by means of various spectroscopic and physicochemical procedures. In vivo toxicity and in vitro anti-inflammatory properties in experimental rat models through membrane stabilization and protein denaturation test are studied here. These imperative complexes, when orally consumed, showed no toxic effect in experimental rats equal to the dose (400 mg/kg) of body weight when fed up to 28 days. Binding constants for the inclusion complexes have been designed by the Stern–Volmer approximation method and found to be higher for pyridoxine, elucidated on account of their molecular structural representation. Additionally, molecular docking aided to enlighten the most possible mode of interactions among guests and β-CD. Both of the encapsulated systems could potentially find applications in vitamin B3 and vitamin B6 formulation for the purpose of enhancing stability, absorption, and controlled delivery of these imperative vitamins. The use of β-CD as a drug delivery vehicle with vitamin B substituents into eukaryotic cells is well documented and thus increases the bioavailability of diverse therapeutics.

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Section: Resultsmentioning

confidence: 99%

Synthesis, Characterization, and Comparison of Host–Guest Complexes of β-CD with Vitamins Explored through Their Biological Activities

et al. 2019

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“…It reveals that ϕ E 0 values are negative and further decrease gradually as the temperature increases for all of the solutions. This may be attributed to structural perturbation caused by the addition of the cyclic diether or to the appearance of caging/packing effect, , and Co(salen) seemed to behave more or less like common electrolytes in binary mixtures of 1,4-dioxane with methanol. However, such a gradual decrease in ϕ E 0 values with increasing temperature suggests a gradual disappearance of such effects leading to the release of CH 3 OH molecules in favor of hydrogen bond interactions with 1,4-dioxane molecules and thus decreases volumes and increases densities of the solutions (Table ).…”

Section: Resultsmentioning

confidence: 99%

Partial Molar Volumes and Viscosity B-Coefficients of N,N′-Ethylene-bis(salicylideneiminato)cobalt(II) in Binary Mixtures of 1,4-Dioxane + Methanol at T = (298.15, 303.15, 308.15, and 313.15) K

Brahman

Sinha

2011

J. Chem. Eng. Data

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Partial molar volumes ϕ V 0 and viscosity B-coefficients of N,N 0 -ethylene-bis(salicylideneiminato)cobalt(II), abbreviated as Co(salen), in different mass fractions (0 to 0.40) of 1,4-dioxane + methanol mixtures were determined from solution density and viscosity measurements at (298.15, 303.15, 308.15, and 313.15) K under ambient pressure. Apparent molar volumes ϕ V and density data at the experimental temperatures were used to calculate the apparent molar expansibilities ϕ E of Co(salen) solutions; the partial molar expansibilities ϕ E 0 were then determined from the relation:The temperature dependence of ϕ E 0 values yielded (∂ϕ E 0 /∂T) P ; the signs of the (∂ϕ E 0 /∂T) P values were discussed to reveal the structure promoting ability of Co(salen) in the experimental solvent/solvent mixtures. The activation parameters of viscous flow for the ternary solutions were also derived and discussed in terms of transition state theory. Various results indicated that the ternary system under investigation is characterized by structural changes and strong soluteÀsolvent interactions.

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“…The positive decrease in / 0 E may be ascribed to the absence of a ''caging effect'' [50]. In other words, both hydroxamic acids show hydrophobic character in ethanol.…”

Section: Volumetric Propertiesmentioning

confidence: 95%

Volumetric and steric properties of hydroxamic acids in ethanol at different temperatures

Yadav

Pande

Khare

et al. 2012

The Journal of Chemical Thermodynamics

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Effect of temperature on the partial molar volumes of some divalent transition metal sulphates and magnesium sulphate in the water-rich region of aqueous mixtures of ethylene glycol

Cited by 24 publications

References 13 publications

Synthesis, Characterization, and Comparison of Host–Guest Complexes of β-CD with Vitamins Explored through Their Biological Activities

Synthesis, Characterization, and Comparison of Host–Guest Complexes of β-CD with Vitamins Explored through Their Biological Activities

Partial Molar Volumes and Viscosity B-Coefficients of N,N′-Ethylene-bis(salicylideneiminato)cobalt(II) in Binary Mixtures of 1,4-Dioxane + Methanol at T = (298.15, 303.15, 308.15, and 313.15) K

Volumetric and steric properties of hydroxamic acids in ethanol at different temperatures

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