Synthesis, physical and thermodynamic properties of 1-alkyl- cyanopyridinium bis{(trifluoromethyl)sulfonyl}imide ionic liquids

Urszula Domańska-Żelazna , Katarzyna Skiba , Maciej Zawadzki , Kamil Paduszyński , Marek Królikowski


Synthesis of new ionic liquids (ILs) viz. 1-butyl-3-cyanopyridinium bis{(trifluoromethyl)sulfonyl}imide, [BCN3Py][NTf2], 1-hexyl-3-cyanopyridinium bis{(trifluoromethyl)sulfonyl}imide,[HCN3Py][NTf2],1-hexyl-4-cyanopyridinium bis{(trifluoromethyl)sulfonyl}imide, [HCN4Py][NTf2], and 1-octyl-3-cyanopyridinium bis{(trifluoromethyl)sulfonyl}imide,[OCN3Py][NTf2] were performed. The specific basic characterization of new compounds by NMR spectra, elementary analysis, water content and glass transition temperature as well as melting temperature, enthalpy of fusion and decomposition of compounds TG/DTA determined by the differential scanning calorimetry, DSC is presented. The heat capacity was measured at three temperatures (298.15, 323.15, and 353.15) K and at pressure 0.1 MPa. The effect of temperature on the density and viscosity is reported over the temperature range from (293.15 to 363.15) K and at 0.1 MPa. The density and viscosity correlation for these systems was provided by an empirical polynomial. From the density–temperature dependence, the isothermal expansion coefficient (volume expansivity), α, was calculated. The surface tension of pure ionic liquids was measured at 0.1 MPa at five temperatures (298.15, 308.15, 318.15, 328.15, and 338.15) K. The surface thermodynamic functions such as surface entropy and enthalpy, critical temperatures according to the Eötvös and Guggenheim definition and the total surface energy of the ILs studied were derived from the temperature dependence of the surface tension values. The parachor and speed of sound for pure ionic liquids were described within a range of temperature from (298.15 to 338.15) K. A qualitative analysis on these quantities in terms of molecular interactions is reported.
Author Urszula Domańska-Żelazna (FC / DPC)
Urszula Domańska-Żelazna,,
- Department Of Physical Chemistry
, Katarzyna Skiba (FC / DPC)
Katarzyna Skiba,,
- Department Of Physical Chemistry
, Maciej Zawadzki (FC / DPC)
Maciej Zawadzki,,
- Department Of Physical Chemistry
, Kamil Paduszyński (FC / DPC)
Kamil Paduszyński,,
- Department Of Physical Chemistry
, Marek Królikowski (FC / DPC)
Marek Królikowski,,
- Department Of Physical Chemistry
Journal seriesJournal of Chemical Thermodynamics, ISSN 0021-9614
Issue year2013
Publication size in sheets0.5
Keywords in EnglishIonic liquid, 1-Alkyl-3 or 4-cyanopyridinium bis(trifluoromethylsulfonyl)imide, Experimental densities and viscosities, Surface tension, DSC, TG/DTA, Heat capacity, Thermodynamics, Correlation
ASJC Classification1606 Physical and Theoretical Chemistry; 2500 General Materials Science; 3107 Atomic and Molecular Physics, and Optics
Languageen angielski
5-s2.0-S0021961412002935-main.pdf 497.02 KB
Score (nominal)35
Score sourcejournalList
ScoreMinisterial score = 30.0, 08-02-2020, ArticleFromJournal
Ministerial score (2013-2016) = 35.0, 08-02-2020, ArticleFromJournal
Publication indicators Scopus Citations = 34; GS Citations = 12.0; Scopus SNIP (Source Normalised Impact per Paper): 2013 = 1.234; WoS Impact Factor: 2013 = 2.423 (2) - 2013=2.399 (5)
Citation count*12 (2015-03-08)
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