Understanding the Formation of Deep Eutectic Solvents: Betaine as a Universal Hydrogen Bond Acceptor

Abranches, Dinis O.; Silva, Liliana P.; Martins, Mónia A.R.; Pinho, Simão P.; Coutinho, João A. P.

doi:10.1002/cssc.202001331

Cited by 99 publications

(64 citation statements)

References 28 publications

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“…For all cases, except for Be:La + CO 2 (Figure 2b), HBA experimental sorption performances was superior than that of HBD, which was also mentioned by D.O. Abranchesn et al (that Be possess weak interaction with itself, but act as excellent HBA) [66]. ChCl+CO 2 showed the best performance with 4.96 mmol CO 2 /g, whereas Al + CO 2 showed the worst capture performance with 3.86 mmol CO 2 /g.…”

Section: Resultssupporting

confidence: 77%

Effect of Hydrogen Bond Donors and Acceptors on CO2 Absorption by Deep Eutectic Solvents

et al. 2020

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The effects of a hydrogen bond acceptor and hydrogen bond donor on carbon dioxide absorption via natural deep eutectic solvents were studied in this work. Naturally occurring non-toxic deep eutectic solvent constituents were considered; choline chloride, b-alanine, and betaine were selected as hydrogen bond acceptors; lactic acid, malic acid, and fructose were selected as hydrogen bond donors. Experimental gas absorption data were collected via experimental methods that uses gravimetric principles. Carbon dioxide capture data for an isolated hydrogen bond donor and hydrogen bond acceptor, as well as natural deep eutectic solvents, were collected. In addition to experimental data, a theoretical study using Density Functional Theory was carried out to analyze the properties of these fluids from the nanoscopic viewpoint and their relationship with the macroscopic behavior of the system, and its ability for carbon dioxide absorption. The combined experimental and theoretical reported approach work leads to valuable discussions on what is the effect of each hydrogen bond donor or acceptor, as well as how they influence the strength and stability of the carbon dioxide absorption in deep eutectic solvents. Theoretical calculations explained the experimental findings, and combined results showed the superiority of the hydrogen bond acceptor role in the gas absorption process, with deep eutectic solvents. Specifically, the cases in which choline chloride was used as hydrogen bond acceptor showed the highest absorption performance. Furthermore, it was observed that when malic acid was used as a hydrogen bond donor, it led to low carbon dioxide solubility performance in comparison to other studied deep eutectic solvents. The cases in which lactic acid was used as a hydrogen bond donor showed great absorption performance. In light of this work, more targeted, specific, deep eutectic solvents can be designed for effective and alternative carbon dioxide capture and management.

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Section: Resultssupporting

confidence: 77%

Effect of Hydrogen Bond Donors and Acceptors on CO2 Absorption by Deep Eutectic Solvents

et al. 2020

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“…[ 15 , 16 , 17 ] DES are obtained by mixing together two or more solid substances, to give an eutectic mixture, showing significant negative deviations to thermodynamic ideality in the liquid state. [18] They may contain a variety of organic and inorganic charged species (anionic and/or cationic) and they use to be cheap, renewable, and biodegradable, The term DES has been coined mainly to differentiate them from another family of non‐conventional solvents, the so called ionic liquids (IL). IL are another class of non volatile salt‐like solvents that were reported for the first time by Walden in the early years of the 20th century.…”

Section: Conventional Organic Solvents Versus Deep Eutectic Solventsmentioning

confidence: 99%

Deep Eutectic Solvents and Multicomponent Reactions: Two Convergent Items to Green Chemistry Strategies

Calvo‐Flores

Mingorance-Sánchez

2021

ChemistryOpen

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One of the highlights of green chemistry is the development of techniques and procedures with low environmental impact. In the last years, deep eutectic solvents (DES) have become an important alternative to conventional organic solvents. For a period ionic liquids have provoked remarkable interest, but they have been displaced by DES because they show easier preparation methods, lower prices, many of them are biode-gradable and compatible with biological systems. In addition, they show adjustable physicochemical properties, high thermal stability, low volatility and are compatible with water. In this paper is reviewed the state of the art of the use of DES paying special attention to the role of reaction media in organic synthesis.

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“…Ionic liquids have been widely used in different fields like pharmaceutical, oil and gas, and chemical industries [ 53 , 54 , 55 , 56 , 57 , 58 ], such as in pharmaceutical products manufacturing [ 59 , 60 , 61 , 62 ], viscosity modifiers [ 63 ], desulfurization of liquid fuels [ 64 ], and liquid-liquid extraction [ 65 , 66 , 67 ]. Several types of ionic liquids, such as polymeric ionic liquids [ 68 , 69 , 70 ], double salt ionic liquids [ 71 ], dicationic ionic liquids [ 72 , 73 , 74 , 75 ], deep eutectic solvents [ 76 , 77 , 78 , 79 ], chiral ionic liquids [ 80 ], and solvate ionic liquids [ 81 , 82 ], have been synthesized for different aforementioned purposes.…”

Section: Ionic Liquid Demulsificationmentioning

confidence: 99%

Application of Ionic Liquids for Chemical Demulsification: A Review

Hassanshahi

2020

Molecules

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In recent years, ionic liquids have received increasing interests as an effective demulsifier due to their characteristics of non-flammability, thermal stability, recyclability, and low vapor pressure. In this study, emulsion formation and types, chemical demulsification system, the application of ionic liquids as a chemical demulsifier, and key factors affecting their performance were comprehensively reviewed. Future challenges and opportunities of ionic liquids application for chemical demulsification were also discussed. The review indicted that the demulsification performance was affected by the type, molecular weight, and concentration of ionic liquids. Moreover, other factors, including the salinity of aqueous phase, temperature, and oil types, could affect the demulsification process. It can be concluded that ionic liquids can be used as a suitable substitute for commercial demulsifiers, but future efforts should be required to develop non-toxic and less expensive ionic liquids with low viscosity, and the demulsification efficiency could be improved through the application of ionic liquids with other methods such as organic solvents.

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Understanding the Formation of Deep Eutectic Solvents: Betaine as a Universal Hydrogen Bond Acceptor

Cited by 99 publications

References 28 publications

Effect of Hydrogen Bond Donors and Acceptors on CO2 Absorption by Deep Eutectic Solvents

Effect of Hydrogen Bond Donors and Acceptors on CO2 Absorption by Deep Eutectic Solvents

Deep Eutectic Solvents and Multicomponent Reactions: Two Convergent Items to Green Chemistry Strategies

Application of Ionic Liquids for Chemical Demulsification: A Review

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