aquo-DESs: Water-based binary natural deep eutectic solvents

Picciolini, Eduardo; Pastore, Genny; Giacco, Tiziana Del; Ciancaleoni, Gianluca; Tiecco, Marcello; Germani, Raimondo

doi:10.1016/j.molliq.2023.122057

Cited by 7 publications

(4 citation statements)

References 74 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In particular, betaine and choline chloride were chosen as HBAs, while differently structured HBDs, such as polyols, organic acids, urea, water, were used as counterparts. [21] Also an hydrophobic/water separable mixture (L-menthol:thymol) was tested as reaction media (Figure 2).…”

Section: Resultsmentioning

confidence: 99%

“…Initially, in order to test the potentiality of DESs to promote the conjugate addition of α‐nitroketones to electron‐poor alkenes, we selected benzoylnitromethane 1 a and methyl vinyl ketone 2 a as sample substrates, and then we explored different DESs formed by a variety of HBDs and HBAs. In particular, betaine and choline chloride were chosen as HBAs, while differently structured HBDs, such as polyols, organic acids, urea, water, were used as counterparts [21] . Also an hydrophobic/water separable mixture (L‐menthol:thymol) was tested as reaction media (Figure 2).…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Investigations on the Use of Deep Eutectic Solvents (DESs) as Promoters for the Conjugate Addition of α‐Nitroketones to Electron‐Poor Alkenes

Gentili,

Marcantoni,

Tiecco

et al. 2024

ChemistrySelect

Self Cite

View full text Add to dashboard Cite

DESs were profitably investigated as solvents and promoters of the conjugate reaction addition of cyclic and acyclic α‐nitroketones to a variety of electron‐poor alkenes. The best results were obtained conducing the reaction in betaine:1,2‐propanediol (1 : 5 molar ratio) DES at room temperature, and enones were demonstrated to be the most effective Michael acceptors. The same reaction conducted by using different molar ratios of the components in this DES showed the eutectic point to be the most effective in terms of the yields observed.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Investigations on the Use of Deep Eutectic Solvents (DESs) as Promoters for the Conjugate Addition of α‐Nitroketones to Electron‐Poor Alkenes

Gentili,

Marcantoni,

Tiecco

et al. 2024

ChemistrySelect

Self Cite

View full text Add to dashboard Cite

show abstract

“…From the Walden plot representations, it is observed that for all NaC 6 /C x mixtures, water addition turns the original poorly ionic ES into a good ionic and superionic mixture. When the KCl line is surpassed (good ionic and superionic domains), 30,31 the conductivity may have a contribution from the Grotthuss mechanism. 32 The Walden rule is an empirical rule that was originally proposed for diluted solutions, and it is expressed as…”

Section: Ionicity: Walden Plotmentioning

confidence: 99%

Natural Eutectic Mixtures of Sodium Salt and Fatty Acids as Electrolytes for Supercapacitors

da Silva,

Anouti,

Montemor

et al. 2024

ACS Sustainable Chem. Eng.

View full text Add to dashboard Cite

High-power energy storage devices, and supercapacitors (SCs) in particular, are critical for the progress of the energy sector as they gather distinctive characteristics, namely, long cyclability and high-power density. However, SC still faces some challenges, namely, very low energy density when compared to batteries and the need to operate in organic solvents to attain larger potential windows. Therefore, advances are necessary to reach higher energy density in more environmentally friendly electrolytes. This study focuses on testing mixtures of water with hydrophobic eutectic systems (ESs), in which the components are environmentally compatible, as electrolytes for SCs. Four different ESs of sodium hexanoate and carboxyl acids (hexanoic acid, octanoic acid, nonanoic acid, and decanoic acid) were studied. The physical characterization of these mixtures was studied through measurement and exploration of several properties, namely, sol−gel diagrams, conductivity, viscosity, density, and ionicity. The electrochemical performance of these mixtures was tested in electrochemical double-layer capacitor cells with microporous activated carbon electrodes through cyclic voltage diffraction and galvanostatic charge−discharge. Overall, it was observed that the hydrophobicity of these systems allows conductive gels to form simply by adding water. The conductivity and fluidity of ESs increased with the water content. Additionally, the specific capacitance decreases when the acid chain increases, while in the voltammograms, resistive features vanish as the water content increases. From this study, the ES of sodium hexanoate with hexanoic acid with 60% molar composition in acid mixtures [NaC 6 :C 6 (0.6)] showed the highest conductivity, 22.3 mS/cm at 293.15 K, and the highest electrode specific capacitance, 71.6 F/g at 0.2 A/g, for a weight water composition of 60%.

show abstract

“…of the components is already a liquid, it is impossible to define it as a simple solution rather than a DES without the use of these quantitative curves. With this approach, recently aquoDESs were realized, characterized and identified as DESs (Picciolini et al, 2023;Tiecco et al, 2022). These are mixtures in which water, thanks to its widely known capabilities as acceptor and donator of H-bonds, is part of a binary mixture.…”

Section: Introductionmentioning

confidence: 99%

The Glycerol/Water Mixture Is an Effective Deep Eutectic Solvent for the Extractions From Food Waste Matrixes

Pompei,

Lepore,

Torregrosa-Chinillach

et al. 2024

Preprint

View full text Add to dashboard Cite

Deep Eutectic Solvents (DESs) are a novel class of organic liquids that are becoming increasingly important in the literature for their green and catalytic properties and for their peculiar structural features. Because of these, they are finding fruitful applications in many different topics. One of the most explored one is their use as green effective extracting agents from food matrices and food waste matrices of valuable bioactive compounds, thanks to their affinity with aromatic and phenolic compounds. In this work, the mixture glycerol/water at 1/2.55 molar ratio is demonstrated to be a DES thanks to the comparison of the experimental melting points with the theoretical curves. This approach is used with both liquid starting components for the first time to our knowledge. This DES was then tested as extracting agent on different food waste matrixes: onion, tomato and apple peels; spent coffee grounds and grape pomace. The results were compared with those obtained with the water and glycerol only components, showing a superior capability of the DES in the extractions, as well as superior antioxidant properties of the extracts. This promotes the use of this mixture at the eutectic point as a DES and opens for a novel approach in which the extract could be directly used without further purification procedures considering the food grade of the DES components.

show abstract

aquo-DESs: Water-based binary natural deep eutectic solvents

Cited by 7 publications

References 74 publications

Investigations on the Use of Deep Eutectic Solvents (DESs) as Promoters for the Conjugate Addition of α‐Nitroketones to Electron‐Poor Alkenes

Investigations on the Use of Deep Eutectic Solvents (DESs) as Promoters for the Conjugate Addition of α‐Nitroketones to Electron‐Poor Alkenes

Natural Eutectic Mixtures of Sodium Salt and Fatty Acids as Electrolytes for Supercapacitors

The Glycerol/Water Mixture Is an Effective Deep Eutectic Solvent for the Extractions From Food Waste Matrixes

Contact Info

Product

Resources

About