Physicochemical properties and activity coefficients at infinite dilution for organic solutes and water in a novel bicyclic guanidinium superbase-derived protic ionic liquid

Urszula Domańska-Żelazna , Marek Królikowski , W. E. Acree , G.A. Baker


The activity coefficient at infinite dilution, View the MathML source, was determined by gas–liquid chromatography at temperatures from T = 308.15 to T = 348.15 K for 54 assorted solutes—among them, alkanes (linear, branched, or cyclic), alkenes, alkynes, aromatic hydrocarbons, alcohols, water, thiophene, tetrahydrofuran, 1,4-dioxane, ethers, acetone, ketones, acetonitrile, pyridine, and 1-nitropropane—in the novel bicyclic guanidine superbase-derived protic ionic liquid 1,3,4,6,7,8-hexahydro-1-methyl-2H-pyrimido[1,2-a]pyrimidine bis(pentafluoroethyl)sulfonylimide, [MTBDH][BETI]. The partial molar excess Gibbs free energy View the MathML source, the partial molar excess enthalpy View the MathML source, and entropy at reference temperature View the MathML source at infinite dilution were calculated from the experimental View the MathML source values obtained over this temperature range. The gas–liquid partition coefficient, KL, was calculated for each solute and discussed in light of the Abraham solvation parameter model. The density of the IL as a function of temperature was also measured. The selectivities for heptane/benzene, heptane/thiophene, heptane/pyridine, and heptane/nitropropane separation problems were calculated from View the MathML source and compared to literature values for select ILs, as these separation problems are central to the petroleum industry.
Author Urszula Domańska-Żelazna (FC / DPC)
Urszula Domańska-Żelazna,,
- Department Of Physical Chemistry
, Marek Królikowski (FC / DPC)
Marek Królikowski,,
- Department Of Physical Chemistry
, W. E. Acree
W. E. Acree,,
, G.A. Baker - [University of Missouri-Columbia]
G.A. Baker,,
Journal seriesJournal of Chemical Thermodynamics, ISSN 0021-9614
Issue year2013
Publication size in sheets0.5
Keywords in English[MTBDH][BETI], Activity coefficients at infinite dilution, Thermodynamics, Density, The Abraham solvation parameter model
ASJC Classification1606 Physical and Theoretical Chemistry; 2500 General Materials Science; 3107 Atomic and Molecular Physics, and Optics
Languageen angielski
6-s2.0-S0021961412004120-main.pdf 683.92 KB
Score (nominal)35
Score sourcejournalList
ScoreMinisterial score = 30.0, 01-02-2020, ArticleFromJournal
Ministerial score (2013-2016) = 35.0, 01-02-2020, ArticleFromJournal
Publication indicators Scopus Citations = 19; Scopus SNIP (Source Normalised Impact per Paper): 2013 = 1.234; WoS Impact Factor: 2013 = 2.423 (2) - 2013=2.399 (5)
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