Evaluation of physicochemical properties of Type-II deep eutectic solvents/Water mixtures based on choline chloride and calcium/magnesium chloride hexahydrate

Journal of Molecular Liquids, Journal Year: 2023, Volume and Issue: 392, P. 123459 - 123459

Published: Oct. 31, 2023

Deep Eutectic Solvents (DESs)/water mixtures are widely proposed as unconventional green solvents in a wide range of applications. Here, we report physicochemical characterization type-II DESs (made by choline chloride and hexahydrate calcium or magnesium)/water mixtures, highlighting the potential techniques employed their possible critical points. Viscosity, electrical conductivity, density were measured at different temperatures water contents data analyzed to obtain information on thermal expansibility coefficient, activation energy, sample ionicity. Nuclear Magnetic Resonance thermogravimetry provided additional extent hydrogen-bond network mixtures. In addition, evaluation microwave (MW) absorption capacity allowed us classify samples suitable media for MW-assisted processes. Together, obtained made it characterize from both structural an application point view.

Language: Английский

CLUSTER AGGREGATION OF WATER-BASED DEEP EUTECTIC SOLVENTS IN WATER AND EVALUATION OF THEIR CYTOTOXICITY

Published: May 28, 2024

Deep Eutectic Solvents (DESs) are emerging in the recent literature as promising environmentally friendly liquids different topics, finding fruitful applications substitutes to common volatile organic solvents. These mixtures prepared via non-solvent procedures and they have peculiar structural features properties. They formed weak interactions, mainly H-bonds, between two species; interactions species well ones occurring same species, lead an impossible regular crystal lattice formation, therefore leading liquid systems. The number of novel DESs present is rapidly increasing because wide H-bonds capable molecules available. One these classes represented by aquoDESs: binary which one components water, confirmed their DESs’ identity theoretical/experimental melting curves approaches. In this work a study cluster formation water-based water dilutions presented. three analysed are: glycolic acid/water (GA/H2O); betaine/water (TMG/H2O), choline chloride/water (ChCl/H2O). Ionic conductivity, viscosity, ultrasound spectroscopy NMR measures showed presence aggregates aquoDESs until values about 50% w/w added water. Finally, taking into account convenient disposal dilution DES, cytotoxicity was evaluated on Caco2 model cells, showing effect be related only non-water liquids.

Language: Английский

The exploration of interaction between DES (1 TEAB: 3 EG) and molecular solvents by transfer properties

Journal of Molecular Liquids, Journal Year: 2024, Volume and Issue: unknown, P. 126757 - 126757

Published: Dec. 1, 2024

Language: Английский