The study of molecular interactions in 1-ethyl-3-methylimidazolium trifluoromethanesulfonate+1-pentanol from density, speed of sound and refractive index measurements

Reddy, M. Srinivasa; Khan, Imran; Raju, K. Thomas S.S.; Suresh, P.; Babu, B. Hari

doi:10.1016/j.jct.2016.03.014

Cited by 27 publications

(6 citation statements)

References 62 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Solvent molecules are even pulled out from the bulk of the solution, so fewer solvent molecules are available for the next addition of the solute molecules. 57 Hence there is a decrease in the k s value as presented in Tables 7 and 8. When the temperature increases, as the molecules get more energy and mobility, the compactness decreases and the free space increases which is clear from the increased k s values at higher temperature.…”

Section: Isentropic Compressibilitymentioning

confidence: 84%

“…This explains that, as the solute molecules, lignin or xylose, are added into the binary solutions of [DBU][OTf], the solvent molecules are attracted to the solute molecules, and thus, the solvent accumulates around the solute. Solvent molecules are even pulled out from the bulk of the solution, so fewer solvent molecules are available for the next addition of the solute molecules . Hence there is a decrease in the k s value as presented in Tables and .…”

Section: Resultsmentioning

confidence: 99%

“…where K is Jacobson's temperature-dependent constant for all the liquids, that can be calculated by (93.875 + 0.375T) × 10 −8 (Table S1), and k s is isentropic compressibility of the mixture. 57 Intermolecular free length 58,59 is directly proportional to the temperature because both density as well as the speed of sound are temperature-dependent quantities. As seen before, in all the ternary systems, k s values increase with an increase in the applied temperature which proves that the intermolecular forces are decreased, which creates a loosely packed structure of the available molecules in a system, thereby obtaining higher L f values for the system.…”

Section: Journal Ofmentioning

confidence: 99%

See 2 more Smart Citations

Apparent Molar Properties and Viscosity Studies of Ternary Systems Composed of Model Lignin and Xylose in DBU Based Ionic Liquid–DMSO Solutions

Jisha,

Gardas

2023

J. Chem. Eng. Data

View full text Add to dashboard Cite

As the world aims for sustainable energy production, biomass dissolution and conversion to value-added products using ionic liquids (ILs), with or without cosolvents, are hot topics in the current scenario. This study focuses on the analysis of volumetric, acoustic, and viscosity properties of ternary systems comprising an IL, [DBU][OTf], an aprotic solvent, namely dimethyl sulfoxide (DMSO), and model biomolecules lignin or xylose in the temperature range of 293.15−333.15 K. Here we compare the properties of the model compounds lignin and xylose, a complex polymer responsible for the rigidity of the plants and the monomer unit of hemicellulose, respectively. Ternary systems of lignin or xylose (0.005, 0.010, 0.015, 0.020, 0.025, 0.030, and 0.035 m) were prepared using the binary solutions of IL in DMSO (0.1−0.4 m) which contributes to a sum of four ternary systems with lignin (I-D-L) and another four with xylose (I-D-X) as the solute. Apparent molar properties (V ϕ and K Sϕ ) were determined with density and speed of sound measurements, and the partial molar properties were evaluated with the help of the Redlich-Mayer equation. Solute−solute, solute−solvent, and solvent−solvent interactions were explained with the empirical parameters S V and S K obtained from the fitting equation. Dynamic and kinematic viscosities were also measured to understand the flow properties of the system. Intermolecular free length (L f ), relaxation time (τ), and acoustic impedance (Z) were also determined to elucidate the intermolecular interactions prevailing in these ternary systems. The experimental values of the dynamic viscosity were fitted well with the VTF model, and the Arrhenius plots were used for the calculation of the energy requirement (E η ) for the particles to move across each other in the ternary systems. This study enhances the ternary system database containing ionic liquids and biomolecules, benefiting biomass processing design, separation processes, and theoretical modeling of complex systems.

show abstract

Section: Isentropic Compressibilitymentioning

confidence: 84%

Section: Resultsmentioning

confidence: 99%

Section: Journal Ofmentioning

confidence: 99%

See 1 more Smart Citation

Apparent Molar Properties and Viscosity Studies of Ternary Systems Composed of Model Lignin and Xylose in DBU Based Ionic Liquid–DMSO Solutions

Jisha,

Gardas

2023

J. Chem. Eng. Data

View full text Add to dashboard Cite

show abstract

“…The following trend has been observed for deviation in refractive index (Δ n D ) values (in terms of strength of interactions) NVP + DEGMEE > NVP + DEGMBE > NVP + TEGMME The temperature effect on deviation in refractive index (Δ n D ) and excess molar volume ( V m E ) is generally opposite in sign. As excess molar volume ( V m E ) values for all of these systems are becoming more positive with the rise in temperature, accordingly, deviation in refractive index (Δ n D ) values are becoming less positive with temperature rise. , …”

Section: Resultsmentioning

confidence: 99%

“…As excess molar volume (V m E ) values for all of these systems are becoming more positive with the rise in temperature, accordingly, deviation in refractive index (Δn D ) values are becoming less positive with temperature rise. 32,67 Molar refraction (R m ) is a measure of the volume occupied by an atom or group and is dependent on pressure, refractive index, composition, and temperature. Figure 4 shows the variation of molar refraction (R m ) with the mole fraction of NVP at different temperatures.…”

Section: Resultsmentioning

confidence: 99%

Volumetric, Acoustic, and Refractive Behavior of Acid Gas Absorbers: N-Vinyl-2-pyrrolidinone and Glycol Ethers (2-(2-Ethoxyethoxy)ethanol, 2-(2-Butoxyethoxy)ethanol, and 2-(2-(2-Methoxyethoxy)ethoxy)ethanol)

Bakshi

Sharma

2023

J. Chem. Eng. Data

View full text Add to dashboard Cite

Thermophysical properties such as density (ρ), speed of sound (u), and refractive index (n D) for pure N-vinyl-2-pyrrolidinone (NVP) and binary mixtures of NVP with 2-(2-ethoxyethoxy)ethanol (DEGMEE), 2-(2-butoxyethoxy)ethanol (DEGMBE), and 2-(2-(2-ethoxyethoxy)ethoxy)ethanol (TEGMME) have been measured over the whole range of mole fraction from temperature T = (298.15 to 323.15) K and at 0.1 MPa pressure employing an Anton Paar vibrating U-tube density and sound velocity meter (DSA 5000 M) and an Abbemat refractometer, respectively. To quantify the nonideality in these systems, the experimental data has been used to evaluate various acoustical and thermodynamic parameters, such as excess molar volume (V m E), deviation in the speed of sound (Δu), isentropic compressibility (κs), excess isentropic compressibility (κs E), deviation in refractive index (Δn D), molar refraction (R m), and polarizability (α). Molecular interactions prevailing in these systems have been explained in terms of variation in the measured and calculated values of physicochemical parameters. The collected thermophysical data can be employed in the optimization and design of a desulfurization/CO2-capture process utilizing the studied solutions. Furthermore, this data can also be utilized for the theoretical model extension as well as in solving many difficult engineering problems such as fluid flow, heat and mass transfer, and energy transformations.

show abstract

Recent Progress on Rubber Based Biocomposites: From Carbon Nanotubes to Ionic Liquids

Khan

Usmani

Bhat

et al. 2016

Green Biocomposites

View full text Add to dashboard Cite

The study of molecular interactions in 1-ethyl-3-methylimidazolium trifluoromethanesulfonate+1-pentanol from density, speed of sound and refractive index measurements

Cited by 27 publications

References 62 publications

Apparent Molar Properties and Viscosity Studies of Ternary Systems Composed of Model Lignin and Xylose in DBU Based Ionic Liquid–DMSO Solutions

Apparent Molar Properties and Viscosity Studies of Ternary Systems Composed of Model Lignin and Xylose in DBU Based Ionic Liquid–DMSO Solutions

Volumetric, Acoustic, and Refractive Behavior of Acid Gas Absorbers: N-Vinyl-2-pyrrolidinone and Glycol Ethers (2-(2-Ethoxyethoxy)ethanol, 2-(2-Butoxyethoxy)ethanol, and 2-(2-(2-Methoxyethoxy)ethoxy)ethanol)

Recent Progress on Rubber Based Biocomposites: From Carbon Nanotubes to Ionic Liquids

Contact Info

Product

Resources

About