Thermophysical, acoustic and optical properties of binary mixtures of imidazolium based ionic liquids + polyethylene glycol

Patel, H.I.; Vaid, Zuber S.; More, Utkarsh U.; Ijardar, Sushma P.; Malek, Naved I.

doi:10.1016/j.jct.2016.02.025

Cited by 37 publications

(20 citation statements)

References 74 publications

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“…DSA-5000 from Anton Paar was used to measure the density and speeds of sound simultaneously and automatically, performance of which was checked by comparing density for the binary mixture of cyclohexane + benzene . The details of the apparatus and techniques used to determine ρ and u have already been described in our earlier publications. − The estimated uncertainty for density was lower than ±0.05 kg m –3 , speeds of sound were lower than ±0.5 m s –1 , and temperature was lower than 0.05 K. The estimated uncertainty for excess molar volume was less than ±0.05 × 10 –6 m 3 mol –1 .…”

Section: Methodsmentioning

confidence: 99%

“…The estimated uncertainty for the refractive index was less than ±5 × 10 –4 . The details of the apparatus and method to calibrate the instrument have already been described in our earlier publications. − …”

Section: Methodsmentioning

confidence: 99%

“…In the absence of sufficient and reliable models that predict the physical properties of these mixtures, the only way is to measure them experimentally. Reports on the physicochemical properties of various binary mixtures of ILs with various organic solvents are available in the literature. − In this context, several researchers have studied various thermodynamic properties of ILs with water, ,− alcohols, ,,,, alkanes, ethers, amines, and alkoxyalkanol. , Most of these works present measurements of density, − ,− speed of sound, − ,− refractive index, ,− …”

Section: Introductionmentioning

confidence: 99%

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Temperature, Composition, and Alkyl Chain-Dependent Molecular Interactions between Imidazolium-Based Ionic Liquids with N-Methylaniline and N-Ethylaniline: Experimental and Theoretical Study

Master

Malek

2020

J. Chem. Eng. Data

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Ionic liquids (ILs), an alternative to conventional molecular organic solvents, have attracted the attention of the scientific community because of their tunable unique physicochemical properties. Among the tested strategies, addition of co-solvents is the most convenient choice to alter the physicochemical properties of ILs for their industrial applications. In the present article, we have measured the density (ρ), speeds of sound (u), and refractive index (n D ) for six binary mixtures of N-methylaniline (NMA) and N-ethylaniline (NEA) + BmimBF 4 + HmimBF 4 + OmimBF 4 over the entire range of composition and at temperatures ranging from 293.15 to 323.15 K at 5 K intervals and at atmospheric pressure. Excess molar volume (V m E ), excess molar isentropic compressibility (K s,m E ), and deviation in the refractive index (Δ φ n D ) on volume fraction basis were calculated from these measured thermophysical properties. Influence of temperature on the excess and deviation properties has been studied. V m E , K s,m E , and Δ φ n D were fitted to the Redlich−Kister polynomial equation, and the parameters for the binary coefficients are reported. The influence of the alkyl chain length of ILs on the thermophysical properties of the mixtures of secondary amines was studied. We have discussed the intermolecular interactions between the ILs and amine molecules using well-known arguments. We further predicted the refractive indices of the studied mixtures using various mixing rules, and the resulting values have been compared with the experimental values through the standard deviation. Experimentally calculated excess molar volumes have been compared with the predicted values of the Prigogine−Flory−Patterson theory and the extended real association model at 298.15 K.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Temperature, Composition, and Alkyl Chain-Dependent Molecular Interactions between Imidazolium-Based Ionic Liquids with N-Methylaniline and N-Ethylaniline: Experimental and Theoretical Study

Master

Malek

2020

J. Chem. Eng. Data

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“…Our group is engaged in studying the thermophysical properties of ILs in their pure form and in combination of various organic solvents. − This work is in continuation to our previous work dealing with the mixture of primary and secondary aryl amines with imidazolium-based ILs. , In the present work, we are discussing the molecular interactions between 1-alkyl-3-methylimidazolium tetrafluoroborate (alkyl = butyl, hexyl, and octyl) and cyclohexylamine (CyHxAm). The molecular interactions are studied using V m E , K s,m E , and Δ ϕ n D calculated through measuring the density, speeds of sound, and refractive index over the whole range of compositions and within the temperature range of 293.15–323.15 K and at atmospheric pressure.…”

Section: Introductionmentioning

confidence: 90%

“…The Prigogine–Flory–Patterson (PFP) theory has been commonly employed by many researchers to analyze the excess thermodynamic functions. ,,− ,− PFP theory is instrumental in interpreting the excess function data for the mixtures having components of different shapes and sizes. H-bonding and strong electrostatic interactions are excluded while developing this theory that is purely an empirical application of the Flory theory.…”

Section: Prediction Of Excess Molar Volumementioning

confidence: 99%

Density, Speeds of Sound, and Refractive Index of Pure and Binary Mixtures of Ionic Liquids Based on Imidazolium Cations and Tetrafluoroborate Anions with Cyclohexylamine

Master

Malek

2021

J. Chem. Eng. Data

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Conventionally used volatile organic solvents in various industrial processes are recently replaced by ionic liquids (ILs) in their pure form and their mixture with suitable cosolvents. In a quest to tune the thermophysical properties of the pure ILs through mixing with the organic solvents, in the present investigation, we had measured the density (ρ), speeds of sound (u), and refractive index (n D) of pure ILs with imidazolium cations and tetrafluoroborate anions and their mixture with cyclic amine, cyclohexylamine, over the entire composition range and temperatures ranging from 293.15 to 323.15 K and at atmospheric pressure. Various thermodynamic and acoustic properties such as excess molar volume (V m E), excess molar isentropic compressibility (Ks,m E), and deviation in refractive index (Δϕ n D) have been determined and used to interpret the molecular interaction within the components of the mixture. Investigation was carried out to understand the nonideal behavior of the mixture, and the influence of the alkyl chain and temperature was reported. The experimentally obtained refractive index is correlated with the theoretically calculated refractive index through several mixing rules. Finally, the experimentally calculated V m E values were compared with the V m E predicted through Prigogine–Flory–Patterson (PFP) theory and the extended real association model. Results of the present investigation give useful insights into fine-tuning the thermophysical properties of ILs for their specialized applications.

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Solvent behavior of an ionic liquid set around a cellulose Iβ crystallite model through molecular dynamics simulations

et al. 2021

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Thermophysical, acoustic and optical properties of binary mixtures of imidazolium based ionic liquids + polyethylene glycol

Cited by 37 publications

References 74 publications

Temperature, Composition, and Alkyl Chain-Dependent Molecular Interactions between Imidazolium-Based Ionic Liquids with N-Methylaniline and N-Ethylaniline: Experimental and Theoretical Study

Temperature, Composition, and Alkyl Chain-Dependent Molecular Interactions between Imidazolium-Based Ionic Liquids with N-Methylaniline and N-Ethylaniline: Experimental and Theoretical Study

Density, Speeds of Sound, and Refractive Index of Pure and Binary Mixtures of Ionic Liquids Based on Imidazolium Cations and Tetrafluoroborate Anions with Cyclohexylamine

Solvent behavior of an ionic liquid set around a cellulose Iβ crystallite model through molecular dynamics simulations

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