Effects of cation and anion on physical properties of room-temperature ionic liquids

Physicochemical and Acid-base Properties of a Series of 2-Hydroxyethylammonium-based Protic Ionic Liquids

“…Qualitatively, linear relationships were found for both Vm and Vinter against Vintra; the least square slopes were 1.52(3) and 0.52(3) for Vm and Vinter, respectively. Similar linear relationships have been found among various APILs, 62 where the least square slopes were 1.593 and 0.594, respectively. Evidently, the smaller slope of Vinter for the present PILs suggests that the additional hydrogen bonding interaction with the Coulombic one significantly operates among the ions in the present PILs.…”

Aerocellulose from cellulose–ionic liquid solutions: Preparation, properties and comparison with cellulose–NaOH and cellulose–NMMO routes

“…Diffusion coefficients of EMIMAc and BMIMCl were Table 1 Approximations used to calculate the diffusion coefficient of a substance released from an infinite plane. and 30 • C (Seki et al, 2010). First, the radius R of the ion was calculated using Einstein formula D EMIM − (T ) = k B T/6 Á(T )R where k B is Boltzmann constant, T is temperature and Á is the viscosity of the medium (EMIMAc) which was taken from Gericke et al (2009) at the corresponding temperatures, 27 • C and 30 • C. Then the radius obtained was used to calculate the diffusion coefficient of EMIM − in water taking water viscosity of 10 −3 Pa s. For such a rough estimation, and also considering some difference in temperature (experimental vs used in literature), the agreement between measured and estimated EMIMAc diffusivity in water is very good, 3 × 10 −4 mm 2 /s (experimental value obtained in this work at 22 • C) vs 4 × 10 −4 at 27 • C calculated with self-diffusion data from Liu et al (2010) and 7 × 10 −4 at 30 • C from Seki et al (2010).…”

“…Diffusion coefficients of EMIMAc and BMIMCl as a function of cellulose concentration during cellulose regeneration in water at 22 • C. The line is given to guide the eye. D EMIM − at C cell = 0 calculated using data fromLiu et al (2010) andSeki et al (2010) are also shown.…”

Physicochemical properties of piperidinium, ammonium, pyrrolidinium and morpholinium cations based ionic liquids paired with bis(trifluoromethylsulfonyl)imide anion

“…Mass transport phenomena and conductivity are affected by viscosity. Thus, viscosity may restrict the suitability of particular ILs for some applications [28,39]. The viscosity of some ILs is frequently significantly higher than that of conventional organic fluids commonly used in industry.…”