ABSTRACT

The surface tension and density of almost all members of the 1-alkyl-3-methylimidazolium bis(trifluoromethylsulfonyl)amides family, [Cnmim][Ntf2], with 2.n.14 were measured for the first time up to 532K and 473 K, respectively. The large number of ionic liquids studied within this family and the broad interval of working temperature enabled us to show evidence for a thermodynamic anomaly in the thermal expansivity of these ionic liquids (minima in .p versus T). The minima themselves have never been witnessed before. The data in this extended temperature range also permitted us to discuss the location of hypothetical normal boiling and critical points.

Compounds

#	Formula	Name
1	C8H11F6N3O4S2	1-ethyl-3-methylimidazolium bis((trifluoromethyl)sulfonyl)imide
2	C10H15F6N3O4S2	1-butyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide
3	C14H23F6N3O4S2	1-octyl-3-methylimidazolium bis[(trifluoromethyl)sulfonyl]imide
4	C9H13F6N3O4S2	1-methyl-3-propylimidazolium bis[(trifluoromethyl)sulfonyl]imide
5	C11H17F6N3O4S2	1-methyl-3-pentylimidazolium bis(trifluoromethylsulfonyl)imide
6	C12H19F6N3O4S2	1-hexyl-3-methylimidazolium bis[(trifluoromethyl)sulfonyl]imide
7	C18H31F6N3O4S2	1-dodecyl-3-methyl-1H-imidazolium bis(trifluoromethylsulfonyl)amide
8	C20H35F6N3O4S2	1-tetradecyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide
9	C13H21F6N3O4S2	1-heptyl-3-methylimidazolium bis(trifluoromethylsulfonyl)amide
10	C16H27F6N3O4S2	1-decyl-3-methylimidazolium bis(trifluoromethylsulfonyl)amide
11	C15H25F6N3O4S2	1-methyl-3-nonylimidazolium bis(trifluoromethanesulfonyl)imide

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	Constraint	Phase	Method	#Points
POMD	1	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Vibrating tube method	19
POMD	1	Surface tension liquid-gas, N/m ; Liquid	Temperature, K; Liquid		Liquid Air at 1 atmosphere	Pendant drop shape	20
POMD	2	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Vibrating tube method	19
POMD	2	Surface tension liquid-gas, N/m ; Liquid	Temperature, K; Liquid		Liquid Air at 1 atmosphere	Pendant drop shape	27
POMD	3	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Vibrating tube method	19
POMD	3	Surface tension liquid-gas, N/m ; Liquid	Temperature, K; Liquid		Liquid Air at 1 atmosphere	Pendant drop shape	20
POMD	4	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Vibrating tube method	19
POMD	4	Surface tension liquid-gas, N/m ; Liquid	Temperature, K; Liquid		Liquid Air at 1 atmosphere	Pendant drop shape	15
POMD	5	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Vibrating tube method	19
POMD	5	Surface tension liquid-gas, N/m ; Liquid	Temperature, K; Liquid		Liquid Air at 1 atmosphere	Pendant drop shape	20
POMD	6	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Vibrating tube method	19
POMD	6	Surface tension liquid-gas, N/m ; Liquid	Temperature, K; Liquid		Liquid Air at 1 atmosphere	Pendant drop shape	12
POMD	7	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Vibrating tube method	15
POMD	7	Surface tension liquid-gas, N/m ; Liquid	Temperature, K; Liquid		Liquid Air at 1 atmosphere	Pendant drop shape	11
POMD	8	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Vibrating tube method	16
POMD	8	Surface tension liquid-gas, N/m ; Liquid	Temperature, K; Liquid		Liquid Air at 1 atmosphere	Pendant drop shape	20
POMD	9	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Vibrating tube method	19
POMD	10	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Vibrating tube method	19
POMD	10	Surface tension liquid-gas, N/m ; Liquid	Temperature, K; Liquid		Liquid Air at 1 atmosphere	Pendant drop shape	31
POMD	11	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Vibrating tube method	19

Thermodynamics Research Center / ThermoML | Fluid Phase Equilibria

High-temperature surface tension and density measurements of 1-alkyl-3-methylimidazolium bistriflamide ionic liquids

Tariq, M.[Mohammad], Serro, A. P.[Ana P.], Mata, J. L.[Jose L.], Saramago, B.[Benilde], Esperanca, J. M. S. S.[Jose M.S.S.], Canongia Lopes, J. N.[Jose N.], Rebelo, L. P. N.[Luis Paulo N.]

ABSTRACT