Partitioning behaviour of organic compounds between ionic liquids and supercritical fluids |
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| Authors: | Roth Michal |
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| Affiliation: | Institute of Analytical Chemistry of the ASCR, v. v. i., Veverí 97, 60200 Brno, Czech Republic. roth@iach.cz |
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| Abstract: | Applications and prospects of two-phase, tuneable solvent systems composed of ionic liquids (ILs) and supercritical fluids with an emphasis on supercritical carbon dioxide (scCO(2)) are reviewed. The IL-scCO(2) biphasic systems have increasingly been used in diverse fields of chemistry and technology, and some examples of these applications are mentioned here. Rational design of such applications can obviously benefit from pertinent data on phase equilibria including the partition coefficients of the prospective products and reactants between the two phases. Therefore, a reliable technique to measure the limiting partition coefficients would be of value. Here, the pros and cons of supercritical fluid chromatography in this respect are discussed. An overview of methods for predictive thermodynamic modelling of binary (IL-scCO(2)) and ternary (solute-IL-scCO(2)) systems is also included. |
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| Keywords: | acac, acetylacetonate APAM, N-acetyl-(S)-phenylalanine methyl ester ATR-IR, attenuated total reflectance infrared (spectroscopy) bmim, 1-n-butyl-3-methylimidazolium bmpy, 1-n-butyl-3-methylpyridinium bupy, butylpyridinium Cnmim, 1-n-alkyl-3-methylimidazolium with n carbon atoms in the alkyl C6H4F9mim, 3-(3,3,4,4,5,5,6,6,6-nonafluorohexyl)-1-methylimidazolium C8H4F13mim, 3-(3,3,4,4,5,5,6,6,7,7,8,8,8-tridecafluorooctyl)-1-methylimidazolium CALB, Candida antarctica lipase B dca, dicyanoamide dppe, 1,2-bis(diphenylphosphino)ethane emim, 1-ethyl-3-methylimidazolium EoS, equation of state EoSs, equations of state GC EoS, group contribution equation of state HDS, hydrodesulfurisation HEA, 2-hydroxyethyl ammonium acetate HEAA, 2-(2-hydroxyethoxy) ammonium acetate HEAF, 2-(2-hydroxyethoxy) ammonium formate HEAL, 2-(2-hydroxyethoxy) ammonium lactate HEF, 2-hydroxyethyl ammonium formate HEL, 2-hydroxyethyl ammonium lactate hmim, 1-n-hexyl-3-methylimidazolium hmmim, 1-n-hexyl-2,3-dimethylimidazolium IL, ionic liquid LCEP, lower critical end point LSER, linear solvation energy relationship MAAC, methyl-(Z)-α-acetamidocinnamate MPhPz, 1-methyl-3-phenylpiperazine NtN, 2-chloro-nicotinonitrile omim, 1-n-octyl-3-methylimidazolium P[MATMA], poly([2-(methacryloyloxy)ethyl]trimethyl ammonium) P[VBMI], poly(1-(p-vinylbenzyl)-3-methylimidazolium) P[VBTMA], poly(p-vinylbenzyltrimethyl ammonium) PCN, 2-(4-methyl-2-phenyl-1-piperazinyl)-3-pyridinecarbonitrile pmim, 1-propyl-3-methylimidazolium pmmim, 1-propyl-2,3-dimethylimidazolium PVT, pressure–volume–temperature (behaviour) S–L, Sanchez–Lacombe (equation of state) SAFT, statistical associating fluid theory scCO2, supercritical carbon dioxide SILP, supported ionic liquid phase soft-SAFT, soft statistical associating fluid theory SWCF, square well chain fluid (EoS) Tf, trifluoromethylsulfonyl Tf2N, bis(trifluoromethylsulfonyl)imide TfO, trifluoromethanesulfonate (triflate) tha, tetrahexylammonium THEAA, tri(2-hydroxyethyl) ammonium acetate THEAL, tri(2-hydroxy ethyl) ammonium lactate thtdp, trihexyltetradecylphosphonium tolBINAP, 2,2′-bis(di-p-tolylphosphino)-1,1′-binaphthyl TON, turnover number tPC-PSAFT, truncated perturbed chain polar statistical associating fluid theory |
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