Viscosity Studies of Some Electrolytes in Dimethyl Sulfoxide and N,N-Dimethylformamide at Different Temperatures

1995 ◽  
Vol 60 (1) ◽  
pp. 55-64 ◽  
Author(s):  
Mohinder S. Chauhan ◽  
Manita Sharma ◽  
Kishore C. Sharma ◽  
K. Ashwini ◽  
Suvarcha Chauhan
Keyword(s):  
Dimethyl Sulfoxide ◽  
Molar Conductivity ◽  
Viscosity Coefficients ◽  
Different Temperatures ◽  
Reference Electrolyte

The limiting molar conductivity Λ0 and the Jones-Dole viscosity coefficients A and B were measured for Ph4PBPh4, Bu4NBPh4, Bu4NClO4, Ph4PBr, Bu4NBr, NaBPh4, NaClO4, KClO4, LiClO4 and AgClO4 in pure DMF and DMSO at 20, 30 and 40 °C. The experimental coefficients A are compared with the coefficients A calculated from the Falkenhagen-Vernon equation. The ionic viscosity coefficients B, which were obtained using Ph4PBPh4 as the reference electrolyte, are discussed in terms of the contributions in the expression: Bion = Bw + Bsolv + Bord + Bdisord + Bshape.

Conductance and Viscometric Studies of Some Tetraalkylammonium and Sodium Salts in Acetonitrile-Dimethyl Sulfoxide Mixtures at 35 °C

1992 ◽  
Vol 57 (10) ◽  
pp. 2078-2088 ◽  
Author(s):  
Mohinder S. Chauhan ◽  
Kishore C. Sharma ◽  
Sanjay Gupta ◽  
Suvarcha Chauhan ◽  
Vijay K. Syal
Keyword(s):  
Dimethyl Sulfoxide ◽  
Binary Mixtures ◽  
Molar Conductivity ◽  
Viscosity Data ◽  
Conductivity Data ◽  
Equation Resolution ◽  
Solvent Interaction ◽  
Sodium Salts ◽  
Ionic Components

Molar conductances and viscosities of Bu4NBPh4, NaBPh4 and R4NBr (R ethyl, propyl and butyl) at 35 °C in acetonitrile (AN), dimethylsulfoxide (DMSO) and their binary mixtures have been reported. The conductivity data has been analysed by the Shedlovsky conductance equation and viscosity data by the Jones-Dole equation. Resolution of limiting molar conductivity (Λ0) and viscosity B coefficient of electrolytes into their ionic components have been achieved by the reference salt method. Viscosity A coefficients have been compared with theoretical Aη coefficients. Derived conductance and viscosity parameters have been discussed in terms of the ion-solvent interaction.

Study of Intermolecular Interactions of CTAB with Amino Acids at Different Temperatures: A Multi Technique Approach

2019 ◽  
Vol 233 (2) ◽  
pp. 167-182 ◽  
Author(s):  
Anwar Ali ◽  
Nizamul Haque Ansari ◽  
Ummer Farooq ◽  
Shadma Tasneem ◽  
Firdosa Nabi
Keyword(s):  
Molar Volume ◽  
Intermolecular Interactions ◽  
Cetyltrimethylammonium Bromide ◽  
Complete Characterization ◽  
Viscosity Data ◽  
Viscosity Coefficients ◽  
Free Energy Of Activation ◽  
Different Temperatures ◽  
Amino Acid Solutions

Abstract The densities, ρ, viscosities, η and specific conductivities κ, of (0.0002, 0.0004, 0.0006 and 0.0008 m) CTAB in 0.1 m aqueous valine, leucine and isoleucine were measured at different temperatures. The measured data were used to calculate various useful thermodynamic parameters. A complete characterization of any mixture can be performed by means of these thermodynamic properties. The apparent molar volume, ϕv, partial molar volume, $\phi _v^0$ and partial molar isobaric expansibilities, $\phi _E^0,$ were calculated using density data. The viscosity data were analyzed using Jones–Dole equation to obtain viscosity coefficients, A- and B-, free energy of activation per mole of solvent, Δμ1°∗, and solute, Δμ2°∗, enthalpy, ΔH∗ and entropy, ΔS∗ of activation of viscous flow. Measuring the changes in these properties has been found to be an excellent qualitative and quantitative way to obtain information regarding the molecular structure and intermolecular interactions occurring in these mixtures. Various structure-making/breaking ability of solute (cetyltrimethylammonium bromide) in presence of aqueous amino acid solutions were discussed. In addition, fluorescence study using pyrene as a photophysical probe has been carried out, the results of which support the conclusions obtained from other techniques.

scholarly journals Molecular dynamics simulation on the morphology of 1,1-diamino-2,2-dinitroethylene (FOX-7) affected by dimethyl sulfoxide (DMSO) and temperature

2019 ◽  
Vol 97 (7) ◽  
pp. 538-545 ◽  
Author(s):  
Guanchao Lan ◽  
Shaohua Jin ◽  
Jing Li ◽  
Zhiyan Lu ◽  
Jian Ruan ◽  
...  
Keyword(s):  
Dimethyl Sulfoxide ◽  
Function Analysis ◽  
Dynamics Simulation ◽  
Coulomb Interactions ◽  
Study Results ◽  
Different Temperatures ◽  
Model Size ◽  
Solvent Molecules ◽  
Model Dimension ◽  
Attachment Energy

The attachment energy (AE) model is adopted to research the influence of dimethyl sulfoxide (DMSO) and temperature on the crystal morphology of 1,1-diamino-2,2-dinitroethylene (FOX-7). FOX-7 crystal habits in DMSO at different temperatures simulated by the AE model have apparently changed compared with the vacuum morphology, indicating that the solvent and temperature can affect FOX-7 morphology. Moreover, the influence of model dimension on the attachment energy has been studied, and a reasonable model size is obtained based on the model dimension study results. Besides, the radial distribution function analysis shows that the solvent molecules adsorb on the FOX-7 surfaces mainly via the solvent–crystal interface interactions of van der Waals forces (vdW) and Coulomb interactions. The analysis of diffusion coefficient of DMSO molecules on the crystal growth surfaces shows that the growth habit is also influenced by the diffusion capacity of DMSO molecules. These simulation results of this study can provide some guidance for the crystallization process of FOX-7.

scholarly journals Study of Thermodynamic and Transport Properties of Glycine, Diglycine, and Triglycine in Aqueous Tartrazine at Different Temperatures

2009 ◽  
Vol 64 (11) ◽  
pp. 758-764 ◽  
Author(s):  
Anwar Ali ◽  
Rajan Patel ◽  
Shahjahan Khan ◽  
Vidiksha Bhushan
Keyword(s):  
Viscous Flow ◽  
Activation Parameters ◽  
Partial Molar Volumes ◽  
Molar Refraction ◽  
Viscosity Data ◽  
Molar Volumes ◽  
Viscosity Coefficients ◽  
Different Temperatures ◽  
Refractive Index Data ◽  
Amino Acid Glycine

The densities (ρ), viscosities (η), and refractive indices (nD) of (0.01, 0.05, 0.10, 0.15, and 0.20 m) amino acid, glycine, and peptides, diglycine and triglycine in 0.01 m aqueous tartrazine solution were determined at 288.15, 293.15, 298.15, 303.15, 308.15, and 313.15 K. The density data were utilized to evaluate apparent molar volumes (φv) which, in turn, were used to determine partial molar volumes (φv ◦) using Masson’s equation. The transfer volumes were also calculated. The viscosity data were analyzed using the Jones-Dole equation to determine the viscosity coefficients and the activation parameters. The activation parameters of viscous flow were obtained to throw light on the mechanism of viscous flow. The molar refraction was calculated using the refractive index data. The results were interpreted in the light of ion-ion, ion-nonpolar, and nonpolar-nonpolar interactions and the effect of increasing hydrophobicity as we move from glycine to triglycine on these interactions in presence of the dye tartrazine was also investigated.

Density, Refractive Index, and Speed of Sound in Binary Mixtures of 2-Ethoxyethanol with Dimethyl Sulfoxide,N,N‘-Dimethylformamide,N,N‘-Dimethylacetamide at Different Temperatures

1997 ◽  
Vol 42 (2) ◽  
pp. 301-303 ◽  
Author(s):  
M. I. Aralaguppi ◽  
C. V. Jadar ◽  
T. M. Aminabhavi ◽  
J. D. Ortego ◽  
S. C. Mehrotra
Keyword(s):  
Refractive Index ◽  
Dimethyl Sulfoxide ◽  
Binary Mixtures ◽  
Speed Of Sound ◽  
Different Temperatures

Transport Behaviour of Ions in N,N-Dimethylformamide and Dimethyl Sulfoxide at Different Temperatures. Conductance Studies

1995 ◽  
Vol 60 (1) ◽  
pp. 43-54 ◽  
Author(s):  
Mohinder S. Chauhan ◽  
Manita Sharma ◽  
Sanjay Gupta ◽  
K. Ashwini ◽  
Suvarcha Chauhan
Keyword(s):  
Association Constant ◽  
Ion Association ◽  
Dipole Interaction ◽  
Molar Conductivity ◽  
Specific Interactions ◽  
Ionic Radii ◽  
Conductance Data ◽  
Different Temperatures ◽  
Transport Behaviour ◽  
Ionic Components

Molar conductivities of Bu4NBPh4, Bu4NNO3, LiNO3, NaNO3, KNO3 and AgNO3 have been reported in pure DMF and DMSO in the temperature range from 20 to 45 °C. The conductance data have been analyzed in terms of limiting molar conductivity Λ0 and ion-association constant KA. Separation of Λ0 into ionic components Λi 0 has been carried out on the basis of Bu4NBPh4 assumption in order to calculate the effective ionic radii ri in DMF and DMSO. Examination of ri values of K+ and Ag+ ions as a function of temperature revealed some specific interactions of Ag+ ion with DMF and DMSO. In DMSO electrostatic ion-dipole interaction of Li+, Na+ and K+ ions is found to be somewhat modified due to dipole-dipole interaction.

Excess molar volumes and viscosities for the n-decane + 1-chlorodecane system at different temperatures

1993 ◽  
Vol 71 (6) ◽  
pp. 790-795 ◽  
Author(s):  
Mercedes E. F. De Ruiz Holgado ◽  
Cecilia R. De Schaefer ◽  
Franco Davolio ◽  
Miguel Katz
Keyword(s):  
Experimental Data ◽  
Viscous Flow ◽  
Excess Molar Volumes ◽  
Solution Thermodynamics ◽  
Molar Volumes ◽  
Viscosity Coefficients ◽  
Excess Viscosities ◽  
Different Temperatures

Excess molar volumes, excess viscosities, and excess energies of activation for viscous flow have been determined for the n-decane + 1-chlorodecane system at different temperatures, over the whole concentration range. The Prigogine–Flory–Patterson model for solution thermodynamics has been used to calculate the excess molar volumes. Grunberg and Nissan, McAllister, Teja and Rice, and Schrodt and Akel models have been used to calculate viscosity coefficients and these were compared with experimental data for the mixtures.

Article

1998 ◽  
Vol 76 (4) ◽  
pp. 407-410
Author(s):  
Yixing Zhao ◽  
Gordon R Freeman
Keyword(s):  
Pure Water ◽  
Mixed Solvents ◽  
Molar Conductivity ◽  
Solvated Electron ◽  
Pure Ethanol ◽  
Electrical Conductances ◽  
Alcohol Water ◽  
Different Temperatures ◽  
Ion Radius ◽  
Pure Methanol

As a foundation for a future measurement of solvated electron mobilities in alcohol-water mixed solvents, the electrical conductances of sodium tetraphenylboride (STPB) in methanol-water, ethanol-water, and 2-propanol-water were measured at different temperatures. The molar conductivity LAMBDA 0 (10-4 S m2 mol-1) of STPB at 298 K is 70 in pure water and 82 in pure methanol; in methanol-water mixed solvents it passes through a minimum, the value being 45 at 70 mol% water. In 2-propanol-water LAMBDA 0 (10-4 S m2 mol-1) at 298 K decreases rapidly from 70 in pure water to 22.6 in 80 mol% water, then gradually to 16.5 in pure 2-propanol. Behavior in ethanol-water is intermediate, with a minimum of 29.5 in 70 mol% water, gradually increasing to 35.5 in pure ethanol. The product of LAMBDA 0 and the solvent viscosity eta has a maximum at about 75 mol% water in methanol, 90 mol% water in ethanol, and 95 mol% water in 2-propanol. The effects are attributed to changes of solvent structure and of solvated ion radius as alcohol is added to water.Key words: alcohol-water mixed solvents, electrical conductivity, large ions, solvent effects, activation energy.

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