Structure and properties of two glucose-based deep eutectic systems

Fernando Bergua; Ignacio Delso; José Muñoz-Embid; Carlos Lafuente; Manuela Artal

doi:10.1016/j.foodchem.2020.127717

Structure and properties of two glucose-based deep eutectic systems

Fernando Bergua, Ignacio Delso, José Muñoz-Embid, Carlos Lafuente, Manuela Artal

Research output: Contribution to journal › Article › peer-review

13 Citations (Scopus)

Abstract

Continued industrialization and increasing environmental problems have highlighted the need to research new eco-friendly solvents, also known as deep eutectic solvents (DESs). To implement these solvents in industrial processes, the knowledge of their molecular organization and thermophysical properties must be enhanced. In this work, two DESs have been characterized: d-glucose:choline chloride:water (GCH) and d-glucose:citric acid:water (GCiH). NMR techniques were used to analyse both the supramolecular structure and the role of water and to calculate the diffusion coefficients. Moreover, seven thermophysical properties at several temperatures were evaluated. As a second aim, the solubility of quercetin was determined. NMR studies showed a stronger supramolecular structure of GCH and a high ratio of β-glucose in both DESs. Based on the thermophysical results, the solvent with choline chloride had the most compact fluid structure. Finally, the solubility of quercetin in the DESs was higher than in water, especially for GCH.

Original language	English
Article number	127717
Journal	Food Chemistry
Volume	336
Early online date	1 Aug 2020
DOIs	https://doi.org/10.1016/j.foodchem.2020.127717
Publication status	Published - 30 Jan 2021

Keywords

Choline chloride
Citric acid
Glucose
Quercetin
Solubility
Thermophysical properties

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10.1016/j.foodchem.2020.127717

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title = "Structure and properties of two glucose-based deep eutectic systems",

abstract = "Continued industrialization and increasing environmental problems have highlighted the need to research new eco-friendly solvents, also known as deep eutectic solvents (DESs). To implement these solvents in industrial processes, the knowledge of their molecular organization and thermophysical properties must be enhanced. In this work, two DESs have been characterized: d-glucose:choline chloride:water (GCH) and d-glucose:citric acid:water (GCiH). NMR techniques were used to analyse both the supramolecular structure and the role of water and to calculate the diffusion coefficients. Moreover, seven thermophysical properties at several temperatures were evaluated. As a second aim, the solubility of quercetin was determined. NMR studies showed a stronger supramolecular structure of GCH and a high ratio of β-glucose in both DESs. Based on the thermophysical results, the solvent with choline chloride had the most compact fluid structure. Finally, the solubility of quercetin in the DESs was higher than in water, especially for GCH.",

keywords = "Choline chloride, Citric acid, Glucose, Quercetin, Solubility, Thermophysical properties",

author = "Fernando Bergua and Ignacio Delso and Jos{\'e} Mu{\~n}oz-Embid and Carlos Lafuente and Manuela Artal",

note = "Acknowledgements: The authors are thankful for the financial support received from Gobierno de Arag{\'o}n and Fondo Social Europeo (E-54) “Construyendo Europa desde Arag{\'o}n”.",

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AU - Bergua, Fernando

AU - Delso, Ignacio

AU - Muñoz-Embid, José

AU - Lafuente, Carlos

AU - Artal, Manuela

N1 - Acknowledgements: The authors are thankful for the financial support received from Gobierno de Aragón and Fondo Social Europeo (E-54) “Construyendo Europa desde Aragón”.

PY - 2021/1/30

Y1 - 2021/1/30

N2 - Continued industrialization and increasing environmental problems have highlighted the need to research new eco-friendly solvents, also known as deep eutectic solvents (DESs). To implement these solvents in industrial processes, the knowledge of their molecular organization and thermophysical properties must be enhanced. In this work, two DESs have been characterized: d-glucose:choline chloride:water (GCH) and d-glucose:citric acid:water (GCiH). NMR techniques were used to analyse both the supramolecular structure and the role of water and to calculate the diffusion coefficients. Moreover, seven thermophysical properties at several temperatures were evaluated. As a second aim, the solubility of quercetin was determined. NMR studies showed a stronger supramolecular structure of GCH and a high ratio of β-glucose in both DESs. Based on the thermophysical results, the solvent with choline chloride had the most compact fluid structure. Finally, the solubility of quercetin in the DESs was higher than in water, especially for GCH.

AB - Continued industrialization and increasing environmental problems have highlighted the need to research new eco-friendly solvents, also known as deep eutectic solvents (DESs). To implement these solvents in industrial processes, the knowledge of their molecular organization and thermophysical properties must be enhanced. In this work, two DESs have been characterized: d-glucose:choline chloride:water (GCH) and d-glucose:citric acid:water (GCiH). NMR techniques were used to analyse both the supramolecular structure and the role of water and to calculate the diffusion coefficients. Moreover, seven thermophysical properties at several temperatures were evaluated. As a second aim, the solubility of quercetin was determined. NMR studies showed a stronger supramolecular structure of GCH and a high ratio of β-glucose in both DESs. Based on the thermophysical results, the solvent with choline chloride had the most compact fluid structure. Finally, the solubility of quercetin in the DESs was higher than in water, especially for GCH.

KW - Choline chloride

KW - Citric acid

KW - Glucose

KW - Quercetin

KW - Solubility

KW - Thermophysical properties

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DO - 10.1016/j.foodchem.2020.127717

M3 - Article

VL - 336

JO - Food Chemistry

JF - Food Chemistry

SN - 0308-8146

M1 - 127717

ER -

Structure and properties of two glucose-based deep eutectic systems

Abstract

Keywords

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