Density and sound speed study of hydration of 1-butyl-3-methylimidazolium based amino acid ionic liquids in aqueous solutions

Dagade, Dilip H.; Shinde, Sandeep P.; Madkar, Kavita R.; Barge, Seema S.

doi:10.1016/j.jct.2014.07.026

Cited by 37 publications

(36 citation statements)

References 73 publications

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“…It is observed that the estimated hydration numbers for AAILs are high as compared to alkali halides or 1‐n‐alkyl‐3‐methylimidazolium based bromide ILs and are in good agreement with those reported for [Emim] based AAILs using activity data and [Bmim] based AAILs using compressibility data ,. The values are also comparable to the hydration numbers reported recently for triethylammonium based carboxylate ionic liquids .…”

Section: Resultssupporting

confidence: 87%

H‐Bonding in Water of Hydration: NIR Spectral Studies of Hydration Behavior of 1‐n‐Alkyl‐3‐metylimidazolium‐Based Bromide and Amino Acid Ionic Liquids at 298.15 K

Dagade

Barge

2017

ChemistrySelect

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H‐bonding in ionic hydration is crucial for understanding various phenomena such as osmolyte effects, ion transport, electrochemical processes, etc. Ionic liquids (ILs) from the biomaterials have great affinity for protein solubility and stabilization due to hydrophobicity and hydrogen bonding ability. To explore potential use of ionic liquids, it is essential to understand hydration of ionic liquids with detailed information on H‐bonding within the water of hydration. In this context, near‐infrared spectral investigation of H‐bonding in water of hydration of 1‐n‐alkyl‐3‐methylimidazolium bromides and 1‐ethyl‐3‐methylimidazolium based amino acid ionic liquids were made through simultaneous estimation of hydration number and hydration spectra of ILs in the spectral range of 7800‐5800 cm−1. Weak H‐bonding extist in the water of hydration for 1‐n‐alkyl‐3‐methylimidazolium bromides while strong cooperative H‐bonding exists in case of amino acid ionic liquids leading to higher hydration numbers. The results further demonstrate that the individual resolved spectral components can be used to analyse (qualitatively and quantitatively) different types of H‐bonded species at ionic surfaces. Along with all these, the effect of hydrophobicity on hydration behavior as well as on the nature and strength of H‐bonding within the hydration shell of ions are also probed and discussed.

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Section: Resultssupporting

confidence: 87%

H‐Bonding in Water of Hydration: NIR Spectral Studies of Hydration Behavior of 1‐n‐Alkyl‐3‐metylimidazolium‐Based Bromide and Amino Acid Ionic Liquids at 298.15 K

Dagade

Barge

2017

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“…Several amino acid ionic liquids, such as tetrabutylphosphonium [23], tetrabutylammonium [24], cholinium [25], 1-butyl-3-methylimidazolium [26] and 1-ethyl-3-methylimidazolium [27,28] salts of 20 natural l -amino acids are known. However, not all of their properties have been previously reported and compared.…”

Section: Introductionmentioning

confidence: 99%

The Relationship between the Structure and Properties of Amino Acid Ionic Liquids

et al. 2019

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Ionic liquids based on different l-amino acids (glycine, l-valine, l-leucine, l-isoleucine, l-histidine, l-methionine, l-tyrosine, l-tryptophan, l-arginine, and l-threonine) and different cations (tetrabutylammonium (TBA), tributylmethylammonium (tBMA), didecyldimethylammonium (DDA), (2-hydroxyethyl)trimethylammonium (choline) (Chol), alkyl(C12-C14) dimethylbenzylammonium (benzalkonium) (BA), dodecyltrimethylammonium (DDTMA), hexadecyltrimethylammonium (HDTMA), octadecyltrimethylammonium (ODTMA) and 1-ethyl-3-methylimidazolium (EMIM)) have been synthesized and characterized by NMR and FTIR. Viscosity, specific rotation, surface activity, thermal stability (TG), and phase transformations (DSC) have been determined and compared with available data. Furthermore, benzalkonium, didecyldimethylammonium, dodecyltrimethylammonium, hexadecyltrimethylammonium, and octadecyltrimethylammonium amino acid ionic liquids have been shown to exhibit surface activity. The dissolution of cellulose in amino acid ionic liquids (AAILs) composed of various cations was also investigated. Cellulose was only dissolved in EMIM salts of amino acids. In particular, the influence of the cation type on selected physicochemical and spectroscopic properties were discussed. The article is a mini review on amino acid ionic liquids.

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“…Each value in the table is the average of triple measurements. A comparison of the experimental values of density for [C 4 mim][Ala] with the reference data, 22 in the temperature range from 293.15 K to 313.15 K shows that the experimental data are in good agreement with the reference data; the maximum deviation is 0.05%.…”

Section: Resultsmentioning

confidence: 85%

“…The viscosity of the electrolyte aqueous solution can be described by Jones–Dole empirical equation: − where η and η 0 are the viscosity of solution and solvent, respectively, c ( c = m ·1 kg/( m ·1 kg· M B + 1000)/1000ρ) is the concentration of substance which can be converted by the measured solution density, and the results are listed in Table S3 of the Supporting Information. A is a parameter which reflects the effects of the ion–ion interactions, and the parameter B reflects the effects of ion–solvent interactions as the viscosity coefficient.…”

Section: Resultsmentioning

confidence: 99%

Densities and Viscosities of Aqueous Amino Acid Ionic Liquids [C_nmim][Ala](n = 3, 4, 5)

Tong

et al. 2017

J. Chem. Eng. Data

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Amino acid ionic liquids [C n mim][Ala] (n = 3, 4, 5) (1-alkyl-3-methylimidazolium alanine salt) were prepared by the neutralization method. The density and viscosity for aqueous solutions of the ionic liquids (ILs) with various molalities were measured at T = (288.15 to 328.15) K with an interval of 5 K. In terms of the Jones–Dole equation, the viscosity B-coefficients with large positive values and dB/dT < 0 were obtained, and these facts implied that the ionic liquids are water-structure-making. According to Feakins, the contribution of the solute per mole to the free energy of activation for viscous flow of the solution, Δμ2 ⧧0, or called as the standard molar activation free energy, was obtained at different temperatures. Under the constant molality of solution, ΔH 2 ⧧0 (the activation enthalpy of the activation for viscous flow of aqueous [C n mim][Ala] (n = 3, 4, 5)) is a temperature-independent constant. This implies that the activation process of the solute for viscous flow of aqueous [C n mim][Ala] (n = 3, 4, 5) is an isoCoulombic reaction. A semiempirical method to estimate the viscosity of aqueous [C n mim][Ala] (n = 3, 4, 5) was put forward based on Eyring’s theory, and the estimated viscosity values of the aqueous ILs are in good agreement with the corresponding experimental ones.

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Density and sound speed study of hydration of 1-butyl-3-methylimidazolium based amino acid ionic liquids in aqueous solutions

Cited by 37 publications

References 73 publications

H‐Bonding in Water of Hydration: NIR Spectral Studies of Hydration Behavior of 1‐n‐Alkyl‐3‐metylimidazolium‐Based Bromide and Amino Acid Ionic Liquids at 298.15 K

H‐Bonding in Water of Hydration: NIR Spectral Studies of Hydration Behavior of 1‐n‐Alkyl‐3‐metylimidazolium‐Based Bromide and Amino Acid Ionic Liquids at 298.15 K

The Relationship between the Structure and Properties of Amino Acid Ionic Liquids

Densities and Viscosities of Aqueous Amino Acid Ionic Liquids [C_nmim][Ala](n = 3, 4, 5)

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Density and sound speed study of hydration of 1-butyl-3-methylimidazolium based amino acid ionic liquids in aqueous solutions

Cited by 37 publications

References 73 publications

H‐Bonding in Water of Hydration: NIR Spectral Studies of Hydration Behavior of 1‐n‐Alkyl‐3‐metylimidazolium‐Based Bromide and Amino Acid Ionic Liquids at 298.15 K

H‐Bonding in Water of Hydration: NIR Spectral Studies of Hydration Behavior of 1‐n‐Alkyl‐3‐metylimidazolium‐Based Bromide and Amino Acid Ionic Liquids at 298.15 K

The Relationship between the Structure and Properties of Amino Acid Ionic Liquids

Densities and Viscosities of Aqueous Amino Acid Ionic Liquids [Cnmim][Ala](n = 3, 4, 5)

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Densities and Viscosities of Aqueous Amino Acid Ionic Liquids [C_nmim][Ala](n = 3, 4, 5)