Behavior of Ternary Mixtures of Hydrogen Bond Acceptors and Donors in Terms of Band Gap Energies

Mannu, Alberto; Cardano, Francesca; Baldino, Salvatore; Fin, Andréa

doi:10.3390/ma14123418

Cited by 2 publications

(2 citation statements)

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“…HBAs are mainly quaternary ammonium salts (e.g., choline chloride), amphoteric ions (e.g., betaine), or their hydrochloride salts. So far, DESs are roughly divided into the following five types: (1) The combination of quaternary ammonium salts with metal chlorides, such as choline ferric chloride or choline chloride-aluminium chloride [7]; (2) The combination of a quaternary ammonium salt and hydrated metal chloride, such as choline chloride-cobalt chloride [8] in aqueous solution; (3) A mixture of quaternary ammonium salts and small organic molecules, such as choline chloride-urea; (4) Mixtures of metal chloride hydrates and an organic HBD, such as copper chloride-fructose [9]; (5) A mixture of non-ionic, molecular HBA and an HBD, such as 4-nitrophenol-menthol [10,11].…”

Section: Classification Of Dessmentioning

confidence: 99%

Research Progress on Deep Eutectic Solvents and Recent Applications

Gao

Kong

et al. 2023

Processes

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In this study, the classification, composition, preparation methods, and performance parameters of deep eutectic solvents (DESs) and their recent applications in natural product extraction, drug delivery systems, trace metal determination, nanomaterial synthesis, and electrochemistry are systematically summarised through the literature of recent decades, using DESs and applications as keywords. The hydrogen bond acceptors (HBA) of DESs are mainly quaternary ammonium salts (e.g., choline chloride) or amphoteric ions (e.g., betaine); the hydrogen bond donors (HBD) are mostly compounds such as urea, polyols, and sugars. Their melting points are related to hydrogen bonding, their polarities are higher than most ionic liquids, and their viscosities are generally in the range of 0.01–5 Pa·s. Compared with traditional organic solvents and conventional ionic liquids, DESs have higher solubility, with their ability to dissolve metal oxides and insoluble drugs, and have good biodegradability. DESs have high extraction rates in flavonoids and phenols, can increase drug solubility in drug delivery systems, can effectively extract and perform pre-concentration of metals in trace metal determination, can synthesise new nanomaterial, and can be used as electrolytes for electrochemical reactions in electrochemistry. This paper collates the relevant literature on the physicochemical properties and multi-field applications of DESs, which provides a deeper understanding of DESs and looks forward to the future development of DESs

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Section: Classification Of Dessmentioning

confidence: 99%

Research Progress on Deep Eutectic Solvents and Recent Applications

Gao

Kong

et al. 2023

Processes

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“…Due to their rather high liquid-gas transition temperatures, deep eutectic solvents (DESs) can be also considered as HBP solvents [37]. A diversity of possible combinations of starting materials, along with a hydrogen bond donor (HBD) and a hydrogen bond acceptor (HBA) in an appropriate molar ratio, provide powerful tools to control the properties of DESs and natural deep eutectic solvents (NADESs) [38] in accordance with their applications, including, among many others, pharmaceutical synthesis [39], band gap systems [40,41], and CO 2 capture [42][43][44][45]. Despite their absorption characteristics being inferior to conventional amine solutions, the systems in which DESs are mixed with amines or DESs comprising amines as HBDs are of particular interest when the optimization of the CO 2 absorption technology is considered.…”

Section: Introductionmentioning

confidence: 99%

How the Presence of CO2 Absorption Promoters and Composition of the Choline Chloride/Amine/Molecular Solvent Mixtures Influence Its Thermophysical Properties and Ability to Absorb Carbon Dioxide

Kazarina,

Golovacheva,

Markin

et al. 2023

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The present research provides data on the density (ρ), viscosity (η) and ability to absorb carbon dioxide of systems containing amine, molecular solvent (MS) and choline chloride (ChCl), with the investigation of the physical properties of both neat amine/MS/ChCl mixtures and their samples after complete CO2 saturation. The effect of the mixture composition was studied by varying amine from primary (monoethanolamine, MEA) to secondary (diethanolamine, DEA) and tertiary (triethanolamine, TEA) amine, and the degree of its substitution from a mono- (MEA, DEA and TEA) to a doubly-substituted (ethylenediamine, EDA) compound. The role of an MS was investigated via the exchange of ethylene glycol (EG) with water and dimethylsulfoxide (DMSO). In addition, the influence of the CO2 absorption promoters present in the ternary MEA/EG/ChCl mixture at an amount of 5 wt. % was also investigated. We show that an increase in ρ and η in the amine/EG/ChCl mixture affects the properties of neat amines. This suggests that in the studied ternary mixtures, the nature of the interspecies interactions is very similar to those in the previously studied MEA/EG/ChCl system. When EG was exchanged for H2O or DMSO, a decrease in ρ and an increase in η were observed. A comparison of the data with the corresponding properties of the systems composed of each pair of the mixture components indicates that the intensity and/or number of interspecies interactions in the present ternary mixtures were stronger than those in pure H2O, DMSO and MEA. While in the presence of promoters no significant changes in the studied properties were found, for the corresponding CO2-saturated samples, the ρ and η increased proportionally to the amount of absorbed gas. This was also the case for all the systems studied in the present research. The overall CO2 absorption of the EG-based mixtures decreased when going from primary to secondary and tertiary amines; it was 21% higher for the MEA/H2O/ChCl system compared to the mixtures containing EG and DMSO, which, in turn, showed similar absorption capacities. When the promoters were added to the MEA/EG/ChCl mixture, the highest capacity was found for the piperazine-containing system.

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Behavior of Ternary Mixtures of Hydrogen Bond Acceptors and Donors in Terms of Band Gap Energies

Cited by 2 publications

References 29 publications

Research Progress on Deep Eutectic Solvents and Recent Applications

Research Progress on Deep Eutectic Solvents and Recent Applications

How the Presence of CO2 Absorption Promoters and Composition of the Choline Chloride/Amine/Molecular Solvent Mixtures Influence Its Thermophysical Properties and Ability to Absorb Carbon Dioxide

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