Nanoconfined Ionic Liquids

Investigation of Anion Structural Effects on Solute‐Solvent Interactions of Ionic Liquids with DMF by Volumetric, Acoustic, Viscometric Properties and COSMO‐RS Calculations

“…The nature of solvent also significantly affects the measured density data of studied ILs. The experimental density results were compared with various functionalized ILs with DMF solvent at 303.15 K which were readily available in literature [4,16,28] . From Figure 2, the experimental density of studied ILs lie in between the range of various functionalized ILs such as benzyldimethylammonium propionate, [BDMPA], benzyldimethylammonium hexanoate, [BDMAH], 3‐methyl‐1‐octylimidazolium acetate, [OmimAc], and N‐alkyl‐N‐methyl morpholinium bis(trifluoromethanesulfonyl) imide, [Mor 1,2 ][TFSI], [Mor 1,4 ][TFSI], [Mor 1,8 ][TFSI], [Mor 1,10 ][TFSI].…”

Effect of Pore Confinement of Ionic Liquids on Solute Diffusion within Mesoporous Silica Microparticles

“…34,69 It has been widely reported that the shift of melting or cold crystallization peaks is an indicator that the IL has successfully been confined within a porous structure. 17,19,34,84 This shift can increase or decrease the melting or crystallization based on many factors, some of which are the pore diameter, pore wall chemistry, synthesis method, and cation/anion components. 17 Another important factor that may lead to the melting point elevation is pore wallinduced layering in the IL, which may help to stabilize crystallites in the pores.…”

“…For example, shifts in the melting temperature (or other characteristic temperatures) of a confined IL have been observed as a function of pore wall chemistry, ionic liquid components, and the method of confinement (e.g., forming an ionogel or confining the IL after synthesis of the substrate). 17 Zuo et al found by differential scanning calorimetry (DSC) that the glass transition temperature of 1-butyl-3-methylimidazolium tetrafluoroborate and 1-butyl-3-octylimidazolium tetrafluoroborate confined between alumina surfaces increased as the confinement length decreased due to interactions between the BF 4 − anion and the positively charged alumina surface. 18 Other techniques to probe the interactions between ILs and pore walls in confined systems include solid-state NMR 19 and FTIR.…”

“…18 Other techniques to probe the interactions between ILs and pore walls in confined systems include solid-state NMR 19 and FTIR. 17 through charge interactions, 14,20,21 from which changes in the physical properties are inferred. ILs confined in mesoporous silica have been investigated as catalysts for asymmetric catalysis, Friedel−Crafts isopropylation, and trimerization reactions.…”

“…Zuo et al found by differential scanning calorimetry (DSC) that the glass transition temperature of 1-butyl-3-methyl­imidazolium tetrafluoroborate and 1-butyl-3-octyl­imidazolium tetrafluoroborate confined between alumina surfaces increased as the confinement length decreased due to interactions between the BF 4 – anion and the positively charged alumina surface . Other techniques to probe the interactions between ILs and pore walls in confined systems include solid-state NMR and FTIR . Molecular dynamics has been extensively used to study the layering of the ionic liquid cation with the pore walls through charge interactions, ,, from which changes in the physical properties are inferred.…”