RT Journal Article
T1 Physico-chemical characterization of methanolic mixtures of cholinium dihydrogen phosphate-based DES
A1 Álvarez Álvarez, María Salomé
A1 Deive Herva, Francisco Javier
A1 Longo González, María Asunción
A1 Rodríguez Rodríguez, Ana María
A1 Segade Zas, MaríaLuisa
A1 Cabeza Gras, Óscar
K1 2213.10 Relaciones Termodinámicas
AB The biocompatibility of three deep eutectic solvents based on cholinium dihydrogen phosphate for their use in lipase-catalyzed reactions was recently demonstrated, so the possible application as cosolvents with methanol in transesterification processes demands an exhaustive characterization of the physical properties. Thus, in this work binary and ternary deep eutectic solvents composed of the abovementioned salt as hydrogen bond acceptor and ethyleneglycol and/or glycerol as hydrogen bond donors were synthesized and mixed with methanol. The density, refractive index, electrical conductivity and dynamic viscosity were determined between 293.15 K and 323.15 K. The experimental data were correlated with different well-known equations and derived magnitudes like excess molar volumes, changes of refractive index on mixing and viscosity deviations were inferred in order to get an in-depth characterization of the studied mixtures with cholinium dihydrogen phosphate-based DES. The most intriguing data observed is the great peak measured for ionic conductivity at very high methanol concentration, which is difficult to explain even with the most recent theoretical models.
PB Journal of Molecular Liquids
SN 01677322
YR 2023
FD 2023
LK http://hdl.handle.net/11093/4836
UL http://hdl.handle.net/11093/4836
LA eng
NO Journal of Molecular Liquids, 383, 122024 (2023)
NO Agencia Estatal de Investigación | Ref. RTI2018-094702-B-I00
DS Investigo
RD 14-ene-2025