Time-Dependent Hydrogen Bond Network Formation in Glycerol-Based Deep Eutectic Solvents

被引：0
|
作者：
Dziubinska-Kuehn, Katarzyna [1 ,2 ]
Pupier, Marion [3 ]
Matysik, Joerg [2 ]
Viger-Gravel, Jasmine [3 ]
Karg, Beatrice [1 ,4 ]
Kowalska, Magdalena [1 ]
机构：
[1] CERN, Esplanade Particules 1, CH-1211 Geneva, Switzerland
[2] Univ Leipzig, Inst Analyt Chem, D-04103 Leipzig, Germany
[3] Univ Geneva, Dept Organ Chem, CH-1211 Geneva, Switzerland
[4] Univ Geneva, Dept Nucl & Particle Phys, CH-1211 Geneva, Switzerland
来源：
CHEMPHYSCHEM | 2022年 / 23卷 / 10期
基金：
欧洲研究理事会;
关键词：
deep eutectic solvents; NMR spectroscopy; structural analysis; solute structure; kinetics; CHOLINE CHLORIDE; AQUEOUS MIXTURES; RELAXATION DYNAMICS; REFRACTIVE-INDEXES; CROSS-RELAXATION; ETHYLENE-GLYCOL; WATER MIXTURES; IONIC LIQUIDS; TEMPERATURE; DENSITIES;
D O I：
10.1002/cphc.202100806
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Over the last few years, Deep Eutectic Solvents have gained popularity as a novel class of green solvents, due to their feasible synthesis and overall low production costs. The properties of glycerol (Gly)-based Deep Eutectic Solvents are frequently associated with the formation of an extended hydrogen bond network. In this study, two-dimensional Nuclear Magnetic Resonance (NMR) spectroscopy is employed to analyse the effect of glycerol oversaturation of the hydrogen bond acceptor, choline chloride (ChCl) on the structural arrangement of glyceline (molar ratio 1 : 2 ChCl:Gly), selected to represent Gly-based Deep Eutectic Solvents. The rearrangement of glycerol molecules, additionally trapping water molecules inside of isolated clusters, is revealed during a time-resolved analysis, performed in the presence of various fractions of water added to solvent. 200 % oversaturated Deep Eutectic Solvent (1 : 4 ChCl:Gly) is found to be a suitable cryoprotectant candidate, based on the revealed glycerol-water interactions.
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页数：10
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