Synthesis and physicochemical properties of the mixtures based on choline acetate or choline chloride

In Competition for Water: Hydrated Choline Chloride:Urea vs Choline Acetate:Urea Deep Eutectic Solvents

“…Overall the minima for ChOAc:U are shifted to higher water contents, and this may be related to the viscosity of the two DESs. It turns out from the literature that neat ChOAc:U is more viscous than neat ChCl:U, 40,43,72 hence species in ChOAc:U would tumble somehow more slowly than in ChCl:U, and their minima are then shifted to a higher H 2 O mole fraction. This is confirmed by 13 C T 1 relaxation times, which are plotted as a function of added H 2 O in Figure 7c,d.…”

“…39 However, comparing the two series, ChCl-based DESs were found to be more deleterious than ChOAc-based ones, 39 giving hence a boost to the design and application of OAc-based DESs. Unlike the parent ChCl-based DESs, a few mixtures of ChOAc and a HBD have been characterized, 32,40 and suggested as media for organic synthesis, 41 enzymatic reactions, 42−47 or biomass treatment. 48 Although ChCl-based DESs, and in particular ChCl:U, are relatively well characterized in terms of structure and H-bond interactions, the network existing between ionic and neutral species in ChOAc-based DESs has scarcely been investigated in detail at the molecular level yet.…”

“…However, comparing the two series, ChCl-based DESs were found to be more deleterious than ChOAc-based ones, giving hence a boost to the design and application of OAc-based DESs. Unlike the parent ChCl-based DESs, a few mixtures of ChOAc and a HBD have been characterized, , and suggested as media for organic synthesis, enzymatic reactions, − or biomass treatment …”

Choline chloride–formic acid mixture as a medium for the reduction of pertechnetates – electrochemical and spectroscopic studies

“…In our previous paper 11 we showed that the temperature dependence of the conductivity and the viscosity of the choline acetate : carboxylic acid mixtures is appropriately described by eqn (1):…”

“…10 Choline acetate (ChA) systems have also been studied (ChA). In our previous paper, 11 we showed that solutions containing ChA in FA and AA (acetic acid) exhibit significantly lower viscosity and higher ionic conductivity than the ChCl : U system under the same conditions. The conductivity of ChA : FA and ChA : AA systems is also higher than that of the respective pure carboxylic acids.…”