Ionic liquid salts

Room-temperature ionic liquids, salts with A,A-dialkylimidazolium cations in synthesis and catalysis 99CRV2071. 

Holbrey, J.D., Reichert, W.M., and Rogers, R.D., Crystal structures of imidazo-lium bis(trifluoromethanesulfonyl)imide ionic liquid salts The first organic salt with a ds-TFSI anion conformation, Dalton Trans., 2267-2271,2004. 

Umebayashi, Y, Fujimori, T., Sukizaki, T., Asada, M., Fujii, K., Kanzaki, R., and Ishiguro, S.-L, Evidence of conformational equilibrium of l-ethyl-3-methylimi-dazolium in its ionic liquid salts Raman spectroscopic study and quantum chemical calculations, J. Phys. Chem. A, 109,8976-8982,2005. 

Reaction improvement by using ionic liquid salts ... 

Ionic Liquids. In the last 20 years, much attention has been given to the use of certain ionic liquid salts, compounds comprising an organic cation, and usually, an inorganic anion as solvents. 46 The most common classes of ionic liquids have the following general structures ... 

B-R]+ A" (organic) + m+X (aqueous) ionic liquid salt/acid waste... 

Adding a polar functional group on the cation will also form water-soluble ionic liquids. Salts 30-33 (Table 2.5), whose imidazolium ring has a hydroxyl functionality, are all soluble in water, even when the hydrophobic hexafluorophosphate anion is used. These salts have been developed for their ability to solubilize inorganic salts (LiCl, HgCl2 and LaCb). ... 

Research has also focused on ionic liquids, salts that are liquid at room temperature and do not evaporate. Ionic liquids are excellent solvents for many materials, and they can be recycled. An example of an ionic liquid is... 

Stoimenovski J, MacFarlane DR, Bica K, Rogers RD (2010) Crystallinevs. ionic liquid salt forms of active pharmaceutical ingredients a position paper. Pharm Res 27 521-526... 

Gordon, P. G., Brouwer, D. H. and Ripmeester, J. A., Probing the local structure of pure ionic liquid salts with solid- and liquid-state NMR, Chem. Phys. Chem. 11, 260-268 (2010). 

Simple halide-containing ionic liquid salts are widely studied as, usually, they are straightforward to prepare. They are of both fundamental relevance in exploring the physical and structural characteristics of ionic liquids as well as of inportance as intermediates in the preparation of other ionic liquids. 

Ganesan, K., Alias, Y. and Ng, S.W., Imidazolimn-based ionic liquid salts 3,3 -dimethyl-l,l -(l,4-phenylenedimethylene)diimidazoliiim bis(tetrafluoroborate) and 3,3 -di-n-butyl-l,l -(l,4-phenylenedimethylene)diiniidazolium bis(trifluoromethanesulfonate), Acta Crystallogr. C64, O478-O480 (2008). 

Table 5 SSNMR parameters for pure ionic liquid salts from Gordon et al. [14] ...

Ionic liquids have attracted much attention in recent years, with many potential applications such as tunable organic solvents. A range of pure ionic liquid salts has been studied using liquid-state and solid-state NMR by Gordon et al. [14]. Cl, Br, and SSNMR were used to probe these molecules to extract information on the solid phase (see Fig. 4 for structures and Table 5 for data). Relaxation times were measured, and second-order quadrupolar coupling was used to investigate molecidar motions. 

Figure 4 Structures of the cations of ionic liquid salts studied by Gordon etal. and their abbreviations. From Ref [14]. Copyright Wiley-VCH. Used with permission.

Table 4.2.1 Mutual solubility of ionic liquid and water for moderately hydrophobic ionic liquids suitable to ionic liquid salt bridge at 25 °C...

Holbrey JD, Reichert WM, Rogers RD (2004) Crystal stmctures of imidazolium bis(trifluor-omethanesulfonyl)imide ionic liquid salts the first organic salt with a cs-TFSI anion conformation. Dalton Trans 2267-2271... 

Bridges, N.J. Rogers, R.D. (2008). Can kosmotropic salt/chaotropic ionic liquid (salt/salt aqueous biphasic systems) be used to remove pertechnetate from complex salt waste. Separation Science and Technology Vol.43 (No.5) 1083-1090. 

Fujino Y, Kakiuchi T (2011) Ionic liquid salt bridge based on Walkyl-AI-methylpyrrolidinium bis(pentafluoroethanesulfonyl)amide for low ionic strength aqueous solutions. J Electroanal... 

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