Tetrabutylammonium Bromide (TBABr)-Based Deep Eutectic Solvents (DESs) and Their Physical Properties

Abstract

Density, viscosity and ionic conductivity data sets of deep eutectic solvents (DESs) formed by tetrabutylammonium bromide (TBABr) paired with ethlyene glycol, 1,3-propanediol, 1,5-pentanediol and glycerol hydrogen bond donors (HBDs) are reported. The properties of DES were measured at temperatures between 303 K and 333 K for HBD percentages of 66.7% to 90%. The effects of HBDs under different temperature and percentages are systematically analyzed. As expected, the measured density and viscosity of the studied DESs decreased with an increase in temperature, while ionic conductivity increases with temperature. In general, DESs made of TBABr and glycerol showed the highest density and viscosity and the lowest ionic conductivity when compared to other DESs. The presence of an extra hydroxyl group on glycerol in a DES affected the properties of the DES.

Molar volume of eutectic solvents as a function of molar composition and temperature

“…The experimental molar volumes of the DESs studied in this work are shown graphically as symbols in Figure 2. Values of molar volume occupied a wide range starting from 72 cm 3 /mol to 264 cm 3 …”

“…Deep eutectic solvents, when carefully designed for a particular application can replace conventional ionic liquids and be used economically in large industrial scales [1]. Many studies have focused on exploring the physico-chemical characteristics of these liquids [2][3][4][5]. These and many similar studies indicated that the physical and thermodynamic properties of the DES are profoundly affected by the nature of DES components, their composition, temperature, pH value and moisture and impurities content.…”

Phase equilibria and diffusion behavior of high pressure CO 2 in tetra-n-heptyl ammonium bromide

“…(2) and (3)), the NRTL model provided better calculation results (except the results of GLE at 343.2 K) since it used three adjustable parameters while the PR-EoS method used only one adjustable parameter. was obtained from the extrapolation of the viscosity of tetrabutylammonium bromide [39] and a further equation for different chains [22,23]. In that much (also see Fig.5c and Fig.5d M a n u s c r i p t M a n u s c r i p t M a n u s c r i p t A c c e p t e d M a n u s c r i p t M a n u s c r i p t M a n u s c r i p t M a n u s c r i p t 21 Table 3 p (MPa) 10 5 η 1 (Pa·s) 10 10 D 1 0 (m 2 /s) 10 predicted; points: experimental; •, this work from FMP; ▲, from Scurto et al [12].…”

Deep Eutectic Solvent-Based Microwave-Assisted Extraction of Baicalin from Scutellaria baicalensis Georgi

“…This is the reason that the alkyl chain length was longer, the polarity was lower, and the viscosity was higher, so the solubility of baicalin decreased [24]. Comparison among DES-1, DES-2, and DES-3 indicated that the extraction yield with DES-1 was maximal.…”