NMR study of choline chloride-based deep eutectic solvents

Delso, Ignacio (Universidad de Zaragoza) ; Lafuente, Carlos (Universidad de Zaragoza) ; Muñoz-Embid, José (Universidad de Zaragoza) ; Artal, Manuela (Universidad de Zaragoza)

Resumen: Nowadays, the eutectic liquids (DESs) are considered an adequate alternative to the traditional solvents. Therefore, there is an increasing interest in the study of the structure, properties and applications of these mixtures. In this paper, several NMR spectroscopic techniques have been used in order to evaluate the molecular structure of three ternary DESs, composed of choline chloride, urea or glycerol or ethylene glycol, and water. The use of routine and non-routine NMR techniques, such as 1H, 13C, correlation experiments, NOESY, ROESY, and diffusion experiments gave us some important evidences pointing to a supramolecular structure of the DES, which may be the origin of their particular behaviour. The mixture containing ethylene glycol shows the feeblest structure. In these ternary solvents, the water is found within the structure that is still retained when DESs are diluted at 10% wt.

Idioma: Inglés

DOI: 10.1016/j.molliq.2019.111236

Año: 2019

Publicado en: JOURNAL OF MOLECULAR LIQUIDS 290 (2019), 111236 [33 pp.]
ISSN: 0167-7322

Factor impacto JCR: 5.065 (2019)

Categ. JCR: PHYSICS, ATOMIC, MOLECULAR & CHEMICAL rank: 4 / 36 = 0.111 (2019) - Q1 - T1
Categ. JCR: CHEMISTRY, PHYSICAL rank: 45 / 158 = 0.285 (2019) - Q2 - T1

Factor impacto SCIMAGO: 0.883 - Atomic and Molecular Physics, and Optics (Q1) - Condensed Matter Physics (Q1) - Spectroscopy (Q1) - Materials Chemistry (Q1) - Physical and Theoretical Chemistry (Q1) - Electronic, Optical and Magnetic Materials (Q1)

Financiación: info:eu-repo/grantAgreement/ES/DGA-FEDER/E31-17R

Tipo y forma: Article (PostPrint)

Área (Departamento): Área Química Orgánica (Dpto. Química Orgánica)
Área (Departamento): Área Química Física (Dpto. Química Física)