Excess properties of the binary liquid systems dimethylsulfoxide + isopropanol and propylene carbonate + isopropanol

1989 ◽  
Vol 67 (6) ◽  
pp. 1105-1108 ◽  
Author(s):  
George Ritzoulis
Keyword(s):  
Dielectric Constant ◽  
Propylene Carbonate ◽  
Binary Systems ◽  
Correlation Factor ◽  
Dielectric Constants ◽  
Excess Properties ◽  
Binary Solvent ◽  
Solvent Mixtures ◽  
Liquid Systems ◽  
Mole Fraction Range

The dielectric constants, viscosities, densities, and refractive indices of the binary solvent mixtures dimethylsulfoxide–isopropanol and propylene carbonate–isopropanol were measured at 25, 30, and 35 °C over the entire mole fraction range. Excess dielectric constant, excess molar polarization, and excess viscosity were calculated. For both binary systems the variation of the Kirkwood correlation factor has been examined. Keywords: propylene carbonate, acetonitrile, correlation factor, excess properties, dielectric constant.

scholarly journals Dielectric and Excess Dielectric Constants of Acetonitrile + Butyl Amine, + Ethylamine, and + Methylamine at 303, 313, and 323 K

2013 ◽  
Vol 2013 ◽  
pp. 1-4 ◽  
Author(s):  
Ch. V. V. Ramana ◽  
A. B. V. Kiran Kumar ◽  
M. Ashok Kumar ◽  
M. K. Moodley
Keyword(s):  
Dielectric Constant ◽  
Intermolecular Interactions ◽  
Mole Fraction ◽  
Entire Range ◽  
Binary Systems ◽  
Mixed Solvents ◽  
Dielectric Constants ◽  
Complete Mole ◽  
Butyl Amine ◽  
Mole Fraction Range

The dielectric constants and excess dielectric constants of the binary systems: acetonitrile + butyl amine, + ethylamine and + methylamine have been studied at 303, 313, and 323 K temperatures and over the complete mole fraction range. The dielectric constants for these mixtures were measured using a microcontroller based system. The results are positive over the entire range of composition. Symmetrical curves were observed for the systems in which the maximum occurs approximately at 0.7-mole fraction of acetonitrile. The results are discussed in terms of intermolecular interactions. The investigation of dielectric constant of mixed solvents bearing amines aims at better comprehension of their biological, chemical, pharmaceutical, technological, and laboratory applications.

scholarly journals DIELECTRIC RELAXATION STUDY OF BINARY MIXTURES AT DIFFERENT TEMPERATURES

2016 ◽  
Vol 8 (9) ◽  
pp. 102
Author(s):  
V. V. Navarkhele
Keyword(s):  
Intermolecular Interaction ◽  
Binary Mixtures ◽  
Binary Systems ◽  
Correlation Factor ◽  
Dielectric Constants ◽  
Excess Properties ◽  
Receptor Interaction ◽  
Kirkwood Correlation Factor ◽  
Bruggeman Factor ◽  
Different Temperatures

<div class="Section1"><p><strong>Objective: </strong>The objective of this work is to study the intermolecular interaction and hydrogen bonding of the two binary mixtures at different temperatures which are determined from <strong>s</strong>tatic dielectric constants and their excess properties.</p><p><strong>Methods: </strong>Dielectric measurements have been carry out using a sensor which is based on frequency domain reflectometry technique. The excess dielectric properties, Kirkwood correlation factor and Bruggeman factor of the binary mixtures have also been calculated and reported in this paper.</p><p><strong>Results: </strong>The positive and negative behavior of excess dielectric permittivity and variation in linear relation in Bruggeman factor suggests the presence of intermolecular interaction in the binary mixtures. The angular Kirkwood correlation factor confirms the parallel and antiparallel orientation of the dipoles in the mixtures.</p><p>Conclusion: The static dielectric constant of binary systems increases with the addition of the volume fraction of water and decreases with increase in temperature. From excess properties, it is confirmed that there is an intermolecular interaction between the studied binary systems. Such study is useful in drug-receptor interaction.</p></div>

scholarly journals The Importance of Dielectric Constant for Drug Solubility Prediction in Binary Solvent Mixtures: Electrolytes and Zwitterions in Water + Ethanol

2010 ◽  
Vol 11 (4) ◽  
pp. 1726-1729 ◽  
Author(s):  
Mohammad Amin Abolghassemi Fakhree ◽  
Daniel R. Delgado ◽  
Fleming Martínez ◽  
Abolghasem Jouyban
Keyword(s):  
Dielectric Constant ◽  
Binary Solvent ◽  
Solvent Mixtures ◽  
Drug Solubility ◽  
Solubility Prediction ◽  
Binary Solvent Mixtures

Effect of viscosity and dielectric constant variation on fractional fluorescence quenching analysis of coumarin dye in binary solvent mixtures

Luminescence ◽  
2018 ◽  
Vol 33 (5) ◽  
pp. 933-940 ◽  
Author(s):  
P. Bhavya ◽  
Raveendra Melavanki ◽  
Raviraj Kusanur ◽  
Kalpana Sharma ◽  
V. T. Muttannavar ◽  
...  
Keyword(s):  
Dielectric Constant ◽  
Fluorescence Quenching ◽  
Binary Solvent ◽  
Solvent Mixtures ◽  
Binary Solvent Mixtures ◽  
Quenching Analysis ◽  
Coumarin Dye

scholarly journals Solvent dielectric effect on electrochemical properties of 3,4-propylenedioxythiophene

2021 ◽  
Author(s):  
Keziban Huner ◽  
Abdulkadir Sezai Sarac
Keyword(s):  
Dielectric Constant ◽  
Electrochemical Properties ◽  
Open Circuit Potential ◽  
Electrochemical Impedance ◽  
Open Circuit ◽  
Dielectric Constants ◽  
Solvent Mixtures ◽  
Carbon Fiber Microelectrode ◽  
Dielectric Effect ◽  
Constant E

The present study is focused on the electrochemical properties of poly(3,4-propylene­dioxy­thiophene) (Poly(ProDOT)), electrocoated on the single carbon-fiber microelectrode (SCFME) in different electrolytic media, with different solvent dielectric constants (35.9, 41.7, 47.5, 53.3, 59.1 and 64.9). The highest deposition charge density of 24.49 mC cm-2 and the highest specific capacitance of 23.17 mF cm-2 were obtained for Poly(ProDOT) synthesized in a medium with the lowest solvent dielectric constant (e = 35.9). Electrochemical impedance spectroscopy (EIS) results of Poly(ProDOT) coated SCFME measured at open circuit potential showed continuously increased impedance magnitudes as ε was increased from 35.9 to 59.1. For all films, almost capacitive impedance responses at lower frequencies at least were obtained. The highest capacitance was observed for the polymer film synthesized in the medium of e = 35.9. The impedance of this film was also measured in different solvent mixtures with different dielectric constants at open circuit potential.

Solubility and Preferential Solvation of Piroxicam in Neat Solvents and Binary Systems

2018 ◽  
Vol 232 (2) ◽  
pp. 257-280 ◽  
Author(s):  
Gabriela Tatiana Castro ◽  
Mauricio Andrés Filippa ◽  
Cecilia Mariana Peralta ◽  
María Virginia Davin ◽  
María Cristina Almandoz ◽  
...  
Keyword(s):  
Binary Mixtures ◽  
Binary Systems ◽  
Preferential Solvation ◽  
Water Concentration ◽  
Binary Solvent ◽  
Solvent Mixtures ◽  
Ideal Behavior ◽  
Vis Spectroscopy ◽  
Linear Solvation Energy ◽  
Aqueous Binary Mixtures

AbstractThe solubilization and solvatochromic behavior of piroxicam (PRX) were analyzed using UV-vis spectroscopy in neat (protic and aprotic) and binary solvent mixtures. The effects of solvent dipolarity/polarizability and solvent–solute hydrogen bonding interactions on the absorption maxima were evaluated by means of the linear solvation energy relationship concept of Kamlet and Taft. This analysis indicated that both interactions play an important role in the position of the absorption maxima in neat solvents. While, the PRX solubility depends on the solute–solvent specific interactions, polarizability and the cohesive forces of the solvent, manifested mainly by means of the Hildebrand’s solubility parameter. Preferential solvation (PS) was studied in 10 binary mixtures. A non-ideal behavior of the wavenumber curve as the function of analytical mole fraction of co-solvent was detected. Index of preferential solvation, as well as the influence of solvent parameters were calculated. The process of dissolution was analyzed in aqueous binary mixtures of ethanol, ethylene glycol and propylene glycol. They were not spontaneous in all proportions, but when water concentration decreases in the mixtures, the process becomes more spontaneous.

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