ABSTRACT

For understanding solvation by ionic liquids, it is mandatory to characterize their static relative dielectric permittivities e ( static dielectric constants ). Exploiting the definition of e in terms of the zero-frequency limit of the frequency-dependent dielectric dispersion curve, the static dielectric constant of an electrically conducting liquid can be extrapolated from dielectric relaxation spectra in the microwave regime. On the basis of this method, we report dielectric constants of 42 ionic liquids at 25 deg C.

Compounds

#	Formula	Name
1	C4H7ClN2	1-methylimidazolium chloride
2	C4H7BrN2	1-methylimidazolium bromide
3	C7H15N2O4P	1,3-dimethylimidazolium dimethylphosphate
4	C7H11F3N2O3S	1-ethyl-3-methylimidazolium trifluoromethanesulfonate
5	C10H21N2O4P	1-ethyl-3-methylimidazolium diethyl phosphate
6	C6H12N2O4S	1-ethyl-3-methylimidazolium hydrogen sulfate
7	C10H20N2O3S	1-ethyl-3-methylimidazolium butylsulfonate
8	C8H16N2O4S	1-ethyl-3-methylimidazolium ethyl sulfate
9	C9H15F3N2O3S	1-butyl-3-methylimidazolium trifluoromethanesulfonate
10	C9H15N3S	1-butyl-3-methylimidazolium thiocyanate
11	C8H15BF4N2	1-butyl-3-methylimidazolium tetrafluoroborate
12	C8H15F6N2P	1-butyl-3-methylimidazolium hexafluorophosphate
13	C9H13F6N3O4S2	1-ethyl-2,3-dimethylimidazolium bis[(trifluoromethyl)sulfonyl]imide
14	C9H17F6N2P	1-butyl-2,3-dimethylimidazolium hexafluorophosphate
15	C9H17BF4N2	1-butyl-2,3-dimethylimidazolium tetrafluoroborate
16	C11H17F6N3O4S2	1-butyl-2,3-dimethyl-1H-imidazolium bis(trifluoromethylsulfonyl)amide
17	C11H21BF4N2	3-butyl-1,2,4,5-tetramethyl-1H-imidazol-3-ium tetrafluoroborate
18	C13H21F6N3O4S2	1-butyl-2,3,4,5-tetramethylimidazolium bis(trifluoromethylsulfonyl)imide
19	C11H20N4	1-butyl-1-methylpyrrolidinium dicyanamide
20	C12H22F6N2O4S2	1-pentyl-1-methylpyrrolidinium 1,1,1-trifluoro-N-[(trifluoromethyl)sulfonyl]methanesulfonamide
21	C13H26F6N2O4S2	triethylpentylammonium bis(trifluoromethylsulfonyl)imide
22	C4H11NO3	2-hydroxyethylammonium acetate
23	C2H8N2O4	ethanolammonium nitrate
24	C5H13NO4	2-hydroxyethylammonium lactate
25	C8H19NO5	triethanolammonium acetate
26	C9H21NO6	triethanolamine lactate
27	C6H11BF4N2O	1-(2-hydroxyethyl)-3-methylimidazolium tetrafluoroborate

Datasets

The table above is generated from the ThermoML associated json file (link above). POMD and RXND refer to PureOrMixture and Reaction Datasets. The compound numbers are included in properties, variables, and phases, if specificied; the numbers refer to the table of compounds on the left.
Type	Compound-#	Property	Variable	Phase	Method	#Points
POMD	1	Relative permittivity at zero frequency ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid	Liquid	Coaxial cylinder capacitor	1
POMD	2	Relative permittivity at zero frequency ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid	Liquid	Coaxial cylinder capacitor	1
POMD	3	Relative permittivity at zero frequency ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid	Liquid	Coaxial cylinder capacitor	1
POMD	4	Relative permittivity at zero frequency ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid	Liquid	Coaxial cylinder capacitor	1
POMD	5	Relative permittivity at zero frequency ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid	Liquid	Coaxial cylinder capacitor	1
POMD	6	Relative permittivity at zero frequency ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid	Liquid	Coaxial cylinder capacitor	1
POMD	7	Relative permittivity at zero frequency ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid	Liquid	Coaxial cylinder capacitor	1
POMD	8	Relative permittivity at zero frequency ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid	Liquid	Coaxial cylinder capacitor	1
POMD	9	Relative permittivity at zero frequency ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid	Liquid	Coaxial cylinder capacitor	1
POMD	10	Relative permittivity at zero frequency ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid	Liquid	Coaxial cylinder capacitor	1
POMD	11	Relative permittivity at zero frequency ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid	Liquid	Coaxial cylinder capacitor	1
POMD	12	Relative permittivity at zero frequency ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid	Liquid	Coaxial cylinder capacitor	1
POMD	13	Relative permittivity at zero frequency ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid	Liquid	Coaxial cylinder capacitor	1
POMD	14	Relative permittivity at zero frequency ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid	Liquid	Coaxial cylinder capacitor	1
POMD	15	Relative permittivity at zero frequency ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid	Liquid	Coaxial cylinder capacitor	1
POMD	16	Relative permittivity at zero frequency ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid	Liquid	Coaxial cylinder capacitor	1
POMD	17	Relative permittivity at zero frequency ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid	Liquid	Coaxial cylinder capacitor	1
POMD	18	Relative permittivity at zero frequency ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid	Liquid	Coaxial cylinder capacitor	1
POMD	19	Relative permittivity at zero frequency ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid	Liquid	Coaxial cylinder capacitor	1
POMD	20	Relative permittivity at zero frequency ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid	Liquid	Coaxial cylinder capacitor	1
POMD	21	Relative permittivity at zero frequency ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid	Liquid	Coaxial cylinder capacitor	1
POMD	22	Relative permittivity at zero frequency ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid	Liquid	Coaxial cylinder capacitor	1
POMD	23	Relative permittivity at zero frequency ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid	Liquid	Coaxial cylinder capacitor	1
POMD	24	Relative permittivity at zero frequency ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid	Liquid	Coaxial cylinder capacitor	1
POMD	25	Relative permittivity at zero frequency ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid	Liquid	Coaxial cylinder capacitor	1
POMD	26	Relative permittivity at zero frequency ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid	Liquid	Coaxial cylinder capacitor	1
POMD	27	Relative permittivity at zero frequency ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid	Liquid	Coaxial cylinder capacitor	1

Thermodynamics Research Center / ThermoML | Journal of Chemical and Engineering Data

Static Relative Dielectric Permittivities of Ionic Liquids at 25 deg C

Huang, M.-M.[Mian-Mian], Jiang, Y.[Yanping], Sasisanker, P.[Padmanabhan], Driver, G. W.[Gordon W.], Weingaertner, H.[Hermann]

ABSTRACT