Synthesis and characterization of analogues of glycine-betaine ionic liquids and their use in the formation of aqueous biphasic systems - Université de Reims Champagne-Ardenne
Article Dans Une Revue Fluid Phase Equilibria Année : 2019

Synthesis and characterization of analogues of glycine-betaine ionic liquids and their use in the formation of aqueous biphasic systems

Matheus Pereira
  • Fonction : Auteur
Sónia Pedro
  • Fonction : Auteur
Joana Gomes
  • Fonction : Auteur
Tania E. Sintra
  • Fonction : Auteur
Sónia P.M. Ventura
  • Fonction : Auteur
João A.P. Coutinho
  • Fonction : Auteur
Mara G. Freire
  • Fonction : Auteur

Résumé

A series of novel analogues of glycine-betaine ionic liquids (AGB-ILs), viz. 1-(4-ethoxy-4-oxobutyl)-1-methylpyrrolidin-1-ium, N,N,N-tri(n-butyl)(4-ethoxy-4-oxobutyl)-1-phosphonium and N,N,N-trialkyl(4-ethoxy-4-oxobutyl)-1-aminium cations with ethyl, n-propyl and n-butyl alkyl chains, combined with the bromide anion, have been synthesized and characterized. Their synthesis and characterization by spectroscopic methods and elemental analysis is here reported. These ILs were further characterized in what concerns their thermal properties and ecotoxicity against Allvibrio fischeri, and compared with the commercial tetra(n-butyl)ammonium and tetra(n-butyl)phosphonium bromide. The novel AGB-ILs described in this work have low melting points, below 100 °C, display high degradation temperatures (180–310 °C), and low toxicity as shown by being harmless or practically harmless towards the marine bacteria Allvibrio fischeri. Finally, the ability of the synthesized AGB-ILs to form aqueous biphasic systems with potassium citrate/citric acid (at pH 7) was evaluated, and the respective ternary phase diagrams were determined. It is shown that the increase of the cation alkyl chain length facilitates the creation of ABS, and that phosphonium-based ILs present a slightly better separation performance in presence of aqueous solutions of the citrate-based salt.
Fichier principal
Vignette du fichier
S0378381219302031.pdf (464.66 Ko) Télécharger le fichier
Origine Fichiers produits par l'(les) auteur(s)

Dates et versions

hal-02429718 , version 1 (25-10-2021)

Licence

Identifiants

Citer

Matheus Pereira, Sónia Pedro, Joana Gomes, Tania E. Sintra, Sónia P.M. Ventura, et al.. Synthesis and characterization of analogues of glycine-betaine ionic liquids and their use in the formation of aqueous biphasic systems. Fluid Phase Equilibria, 2019, 494, pp.239-245. ⟨10.1016/j.fluid.2019.05.001⟩. ⟨hal-02429718⟩
56 Consultations
97 Téléchargements

Altmetric

Partager

More