ABSTRACT

Experimental dataoverthetemperaturerangefrom268to365Karepresentedonthe0.1MPadensity and surfacetensionforthree1-Cn-3-methylimidazolium hexafluorophosphateswith n = 5,7,and9.In addition, experimentaldataonsurfacetensiondependenceontemperaturearepresentedforhexaflu- orophosphates with[C3MIM], [C4MMIM] and[C4MPy] cation.Foralloftheseionicliquidsthereexists only sporadicdatasetsortheyhavenotyetbeenstudiedatallinthesetworespects.Thereportedden- sity datawereobtainedusingasingle-sinkerbuoyancymethod.Theexpandedcombineduncertaintyat 0.95 confidencelevelinthedensityandsurfacetensionmeasurementsisestimatedtobe,respectively, from 0.3to0.7kgm-3 and from0.05to0.07mNm-1. Todeterminethebuoyancyandsurfaceforces, the Kru1/2 ss K100MK2tensiometerwasused.Agroupcontributionmodelisproposedtogeneraterecom- mended valuesofdensityat0.1MPafor1-Cn-3-methylimidazolium hexafluorophosphateswith n = 2 9 at temperaturesfrom273to365K.Theworth-caserelativeerroroftherecommendeddensityvaluesis estimated to0.1%.Thehomologousseriesoftheimidazolium-basedhexafluorophosphatesshowsstatis- tically discernibleodd-eveneffectsinthemolarvolume,andinenthalpyandentropyofsurfaceformation at theleveloftheorderofmagnitudeof10-1 cm3mol-1, 100 mJm-2 and 10-3 mJm-2K-1, respectively.

Compounds

#	Formula	Name
1	C9H17F6N2P	1-methyl-3-pentylimidazolium hexafluorophosphate
2	C11H21F6N2P	1-heptyl-3-methylimidazolium hexafluorophosphate
3	C13H25F6N2P	1-nonyl-3-methylimidazolium hexafluorophosphate
4	C9H17F6N2P	1-butyl-2,3-dimethylimidazolium hexafluorophosphate
5	C10H16F6NP	1-butyl-3-methylpyridinium hexafluorophosphate
6	C7H13F6N2P	1-methyl-3-propylimidazolium hexafluorophosphate

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	Buoyancy - hydrostatic balance with magnetic suspension - one sinker	19
POMD	1	Surface tension liquid-gas, N/m ; Liquid	Temperature, K; Liquid		Liquid Air at 1 atmosphere	Wilhelmy plate	19
POMD	1	Surface tension liquid-gas, N/m ; Liquid	Temperature, K; Liquid		Liquid Air at 1 atmosphere	Ring tensiometer	19
POMD	2	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Buoyancy - hydrostatic balance with magnetic suspension - one sinker	15
POMD	2	Surface tension liquid-gas, N/m ; Liquid	Temperature, K; Liquid		Liquid Air at 1 atmosphere	Wilhemly plate	15
POMD	2	Surface tension liquid-gas, N/m ; Liquid	Temperature, K; Liquid		Liquid Air at 1 atmosphere	Ring tensiometer	14
POMD	3	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Buoyancy - hydrostatic balance with magnetic suspension - one sinker	15
POMD	3	Surface tension liquid-gas, N/m ; Liquid	Temperature, K; Liquid		Liquid Air at 1 atmosphere	Wilhelmy plate	16
POMD	3	Surface tension liquid-gas, N/m ; Liquid	Temperature, K; Liquid		Liquid Air at 1 atmosphere	Ring tensiometer	16
POMD	4	Surface tension liquid-gas, N/m ; Liquid	Temperature, K; Liquid		Liquid Air at 1 atmosphere	Wilhelmy plate	10
POMD	5	Surface tension liquid-gas, N/m ; Liquid	Temperature, K; Liquid		Liquid Air at 1 atmosphere	Wilhelmy plate	9
POMD	6	Surface tension liquid-gas, N/m ; Liquid	Temperature, K; Liquid		Liquid Air at 1 atmosphere	Wilhelmy plate	15
POMD	6	Surface tension liquid-gas, N/m ; Liquid	Temperature, K; Liquid		Liquid Air at 1 atmosphere	Ring tensiometer	15

Thermodynamics Research Center / ThermoML | Fluid Phase Equilibria

Group contributionandparachoranalysisofexperimentaldataon densities and surface tension for six ionic liquids with the [PF6] anion

Klomfar, J.[Jaroslav], Souckova, M.[Monika], Patek, J.[Jaroslav]

ABSTRACT