Molar enthalpy of mixing and refractive indices of choline chloride-based deep eutectic solvents with water

Ma, Chunyan; Guo, Yanhua; Li, Dongxue; Zong, Jianpeng; Ji, Xiaoyan; Liu, Chang

doi:10.1016/j.jct.2016.10.002

Cited by 41 publications

(38 citation statements)

References 28 publications

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“…The reduction of the interaction between the molecules tends to increase the free volume thus lowering the refractive index at higher temperatures. In one of our earlier investigations, FDESs have been observed to exhibit similar delineation with varying temperature 28 . The higher refractive index is exhibited by NADES formed with higher molecular weight counterparts.…”

Section: Resultssupporting

confidence: 62%

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One-pot simultaneous production and sustainable purification of fibrinolytic protease from Bacillus cereus using natural deep eutectic solvents

Rathnasamy

Durai

Vigneshkumar

et al. 2020

Sci Rep

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Section: Resultssupporting

confidence: 62%

“…The observed trends of refractive index are associated with the temperature by the following equation. where V 1 and V 2 indicate the linearity coefficients whose values are provided in Table 2 while T is the temperature in Kelvin and the refractive index is denoted by n D 28 .…”

Section: Resultsmentioning

confidence: 99%

One-pot simultaneous production and sustainable purification of fibrinolytic protease from Bacillus cereus using natural deep eutectic solvents

Rathnasamy

Durai

Vigneshkumar

et al. 2020

Sci Rep

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“…The TG curves of decanoic acid/L-proline NADES maintained good stability when the content of water was not much more than 35% (V/V). This might have been due to the formation of a NADES hydrate, which was discussed in previous studies [41,42]. However, the hydrogen bond was gradually weakened with water added up to 45% (V/V).…”

Section: Phmentioning

confidence: 75%

Amino Acid-Based Natural Deep Eutectic Solvents for Extraction of Phenolic Compounds from Aqueous Environments

Liu

et al. 2021

Processes

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The environmental pollution of phenol-containing wastewater is an urgent problem with industrial development. Natural deep eutectic solvents provide an environmentally friendly alternation for the solvent extraction of phenol. This study synthesized a series of natural deep eutectic solvents with L-proline and decanoic acid as precursors, characterized by in situ infrared spectrometry, Fourier transform infrared spectrometry, hydrogen nuclear magnetic resonance spectrometry, and differential thermogravimetric analysis. Natural deep eutectic solvents have good thermal stability. The high-efficiency extraction of phenol from wastewater by natural deep eutectic solvents was investigated under mild conditions. The effects of natural deep eutectic solvents, phenol concentration, reaction temperature, and reaction time on phenol extraction were studied. The optimized extraction conditions of phenol with L-prolin/decanoic acid were as follows: molar ratio, 4.2:1; reaction time, 60 min; and temperature, 50 °C. Extraction efficiency was up to 62%. The number of extraction cycles can be up to 6, and extraction rate not less than 57%. The promising results demonstrate that natural deep eutectic solvents are efficient in the field of phenolic compound extraction in wastewater.

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“…Furthermore, there are properties that provide information about the molecular behavior of this solvent when interacting with other substances which might be in the medium that are also of great importance in order to explore and understand its molecular behaviour and make available new and useful applications [31,32]. In the literature, several papers reporting thermophysical properties of pure glyceline [33][34][35][36][37][38][39][40][41][42][43][44] and its mixtures with water [16,[42][43][44][45][46] or other NADESs [47,48]…”

Section: Introductionmentioning

confidence: 99%

The NADES glyceline as a potential Green Solvent: A comprehensive study of its thermophysical properties and effect of water inclusion

Lapeña

Lomba

Artal

et al. 2019

The Journal of Chemical Thermodynamics

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In this paper, two Natural Deep Eutectic Solvents, glyceline (Gly) and glyceline-water (GlyW), containing choline chloride as acceptor H-bond compound and glycerol as donor H-bond group are studied. For glyceline the mole relation is 1 (choline chloride): 2 (glycerol) and for glyceline-water the mole relation is 1 (choline chloride) : 1.99 (glycerol) : 1.02 water. The ternary NADES has been synthetized and characterized chemically by NMR techniques for this work. Several thermophysical properties in a wide range of temperature (278.15-338.15) K and at atmospheric pressure (0.1 MPa) have been measured for both compounds: density, , speed of sound, , refractive index, , surface tension, , isobaric molar heat capacity, , , kinematic viscosity, , and electric conductivity,. Furthermore, some related properties have been also calculated: isobaric expansibility, , isentropic compressibility, , molar refraction, , entropy and enthalpy of surface formationper unit surface area (Δ and Δ), and dynamic viscosity, , and viscous flow and electrical conductivity activation energies. The results have been discussed in terms of the effect of temperature and the inclusion of water. We conclude that the compound containing water into the structurehas a higher molar volume and a higher fluidity. The binary NADES (Gly) is a more structured liquid than ternary one (GlyW).

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Molar enthalpy of mixing and refractive indices of choline chloride-based deep eutectic solvents with water

Cited by 41 publications

References 28 publications

One-pot simultaneous production and sustainable purification of fibrinolytic protease from Bacillus cereus using natural deep eutectic solvents

One-pot simultaneous production and sustainable purification of fibrinolytic protease from Bacillus cereus using natural deep eutectic solvents

Amino Acid-Based Natural Deep Eutectic Solvents for Extraction of Phenolic Compounds from Aqueous Environments

The NADES glyceline as a potential Green Solvent: A comprehensive study of its thermophysical properties and effect of water inclusion

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