Physical behavior of some reaction media. 3. Density, viscosity, dielectric constant, and refractive index changes of methanol + dioxane mixtures at several temperatures

Παπαναστασίου, Γεώργιος; Ziogas, I.

doi:10.1021/je00006a008

Cited by 98 publications

(41 citation statements)

References 7 publications

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“…Numerous authors (19)(20)(21)(22)(23)(24) have provided evidence that methanol and ethanol the entropy of surface formation per unit area, s, which is defined by (25) …”

Section: Resultsmentioning

confidence: 99%

Thermodynamic Analysis of Surface Formation of {1,4-Dioxane + 1-Alkanol} Mixtures

Lorenzo

Pintos

Amigo

et al. 2002

Journal of Colloid and Interface Science

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“…Numerous authors (19)(20)(21)(22)(23)(24) have provided evidence that methanol and ethanol the entropy of surface formation per unit area, s, which is defined by (25) …”

Section: Resultsmentioning

confidence: 99%

Thermodynamic Analysis of Surface Formation of {1,4-Dioxane + 1-Alkanol} Mixtures

Lorenzo

Pintos

Amigo

et al. 2002

Journal of Colloid and Interface Science

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“…at different voltage Â current products, was calculated from the measured voltage/current ratio. According to the data presented by Papanastasiou and Zlogas [24], from 20 to 301C, the viscosity of MeOH decreases 1.34% per 1C. In this temperature range, the viscosity of methanolic solution depends linearly on temperature:…”

Section: Instrumentation and Experimental Conditionsmentioning

confidence: 87%

Capillary electrophoretic and computational study of the complexation of valinomycin with rubidium cation

et al. 2009

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This study is focused on the characterization of interactions of valinomycin (Val), a macrocyclic dodecadepsipeptide antibiotic ionophore, with rubidium cation, Rb(+). Capillary affinity electrophoresis was employed for the experimental evaluation of the strength of the Val-Rb(+) complex. The study involved the measurement of the change of effective electrophoretic mobility of Val at increasing concentration of Rb(+) cation in the BGE. From the dependence of Val effective electrophoretic mobility on the Rb(+) cation concentration in the BGE (methanolic solution of 100 mM Tris, 50 mM acetic acid, 0-1 mM RbCl), the apparent binding (stability) constant (K(b)) of the Val-Rb(+) complex in methanol was evaluated as log K(b)=4.63+/-0.27. According to the quantum mechanical density functional theory calculations employed to predict the most probable structure of Val-Rb(+) complex, Val is stabilized by strong non-covalent bond interactions of Rb(+) with six ester carbonyl oxygen atoms so that the position of the "central" Rb(+) cation in the Val cage is symmetric.

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“…Briefly, from the previously obtained calibration curve of the temperature increase inside the capillary (DT) versus employed input power, the temperature increase at particular input power applied in the ACE experiments was derived. The measured effective mobilities were subsequently recalculated to the reference temperature of 251C, assuming the mean increase in mobility (viscosity) in methanol to be 1.34% per 1C [27]:…”

Section: Selection Of Separation Conditionsmentioning

confidence: 99%

Affinity capillary electrophoresis and density functional theory employed for the characterization of hexaarylbenzene‐based receptor complexation with alkali metal ions

et al. 2011

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In this study, affinity capillary electrophoresis (ACE) and quantum mechanical density functional theory (DFT) calculations were combined to investigate non-covalent binding interactions between the hexaarylbenzene-based receptor (R) and alkali metal ions, Rb(+) and Cs(+) , in methanol. The apparent binding (stability) constants (K(b) ) of the complexes of receptor R with alkali metal ions in the methanolic medium were determined by ACE from the dependence of effective electrophoretic mobility of the receptor R on the concentration of Rb(+) and Cs(+) ions in the BGE using a non-linear regression analysis. The receptor R formed relatively strong complexes both with rubidium (log K(b) =4.04±0.21) and cesium ions (log K(b) =3.72±0.22). The structural characteristics of the above alkali metal ion complexes with the receptor R were described by ab initio density functional theory calculations. These calculations have shown that the studied cations bind to the receptor R because they synergistically interact with the polar ethereal fence and with the central benzene ring via cation-π interaction.

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Physical behavior of some reaction media. 3. Density, viscosity, dielectric constant, and refractive index changes of methanol + dioxane mixtures at several temperatures

Cited by 98 publications

References 7 publications

Thermodynamic Analysis of Surface Formation of {1,4-Dioxane + 1-Alkanol} Mixtures

Thermodynamic Analysis of Surface Formation of {1,4-Dioxane + 1-Alkanol} Mixtures

Capillary electrophoretic and computational study of the complexation of valinomycin with rubidium cation

Affinity capillary electrophoresis and density functional theory employed for the characterization of hexaarylbenzene‐based receptor complexation with alkali metal ions

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