Further Extending the Dilution Range of the “Solvent-in-DES” Regime upon the Replacement of Water by an Organic Solvent with Hydrogen Bond Capabilities

Abstract

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On the coupling between ionic conduction and dipolar relaxation in deep eutectic solvents: Influence of hydration and glassy dynamics

“…10,27,28,36,38,39 Although supramolecular ionic clusters formed by the association of the initial DES components seem resistant to moderate hydration levels in the so-called 'water-in-DES' regime, water molecules often participate in the H-bond complexes of the original DESs as an additional HBD. 38,[40][41][42] The preferential solvation of chloride by water was also reported in choline chloride based DESs. 27,33,43,44 Dielectric relaxation study of aqueous solution of glyceline and reline performed at room temperature and high (microwave) frequencies (0.05 to 89 GHz) indicates that a structural transition occurs for water mole fraction about 0.8, from the homogeneous electrolyte solution to a micro-heterogeneous structure with water-rich and DES-rich pools.…”

“…27,33,43,44 The Hbond interactions within the original DESs supramolecular complexes are also affected by water acting as an additional HBD. 38,[40][41][42] For these reasons, it seems unlikely that a persistent revolving- For large water mass fraction (W > 40%), a completely different situation is observed, with a large decoupling between both dynamics. This is illustrated by a sudden jump of the strength parameter of the ionic conductivity from about D = 15 to 60 at W = 40%, which is consistent by the close to Arrhenian behavior of the conductivity shown in Fig.…”

Aqueous Co‐Solvent in Zwitterionic‐based Protic Ionic Liquids as Electrolytes in 2.0 V Supercapacitors

“…The temperature was fixed at 100 °C to avoid the freezing of the systems during the simulation due to the viscous nature of the studied ZPILs. The complete set of settings of the MD simulations was reported in our previous studies [67,68] …”

Easy and Efficient Recovery of EMIMCl from Cellulose Solutions by Addition of Acetic Acid and the Transition from the Original Ionic Liquid to an Eutectic Mixture

“…Along the subsequent years of ILs and DESs discovery, few attempts were made to correlate DESs and ILs [ 4 ]. More recently, this view has changed thanks to studies describing the presence of H bonds in ILs and aqueous dilutions of ILs with the anion (chloride in most of cases, but other ones may be too) playing a critical role [ 5 , 6 , 7 , 8 , 9 , 10 ], similarly to what happens in DESs and DESs dilutions [ 11 , 12 , 13 , 14 , 15 ]. In fact, aqueous dilutions of hydrated salts at a certain range of dilution have also been recently described as DESs [ 16 ].…”