ABSTRACT

Various thermophysical properties, densities, electrical conductances, viscosities, and refractive indices of two ionic liquids, 1-pentyl-3-methylimidazolium bromide ([PnMIm]Br) and 1-propyl-3-methylimidazolium bromide ([PMIm]Br, in the presence of N,N'-bis(2-pyridylmethylidene)-1,2-diiminoethane (BPIE) Schiff base in N,N-dimethylformamide (DMF) solutions have been measured at 298.15 K. These data have been used to calculate the standard partial molar volumes, V0, partial molar volumes of transfer, trV0, ion association constants, Ka, limiting molar conductivities, 0, viscosity B-coefficients, and molar refractions, RD, for the solutions studied. These parameters decrease with increasing BPIE concentration and increase with increasing alkyl chain length of ionic liquids. The results were interpreted in terms of cosphere overlap model and solute solvent interactions. In general, it is concluded that there is an enhancement in the nonpolar nonpolar interactions between the BPIE Schiff base and the ionic liquid.

Compounds

#	Formula	Name
1	C3H7NO	dimethylformamide
2	C7H13BrN2	1-methyl-3-propylimidazolium bromide
3	C9H17BrN2	1-pentyl-3-methylimidazolium bromide
4	C14H14N4	N,N'-bis(2-pyridinylmethylene)-1,2-ethanediamine

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	VIBTUB:UFactor:4	1
POMD	1	Refractive index (Na D-line) ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid		Liquid	Standard Abbe refractometry	1
POMD	1	Viscosity, Pa*s ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid		Liquid	Capillary tube (Ostwald; Ubbelohde) method	1
POMD	1	Mass density, kg/m3 ; Liquid		Pressure, kPa; Liquid Temperature, K; Liquid	Liquid	Vibrating tube method	2
POMD	1 4 3	Mass density, kg/m3 ; Liquid	Molality, mol/kg - 3; Liquid Solvent: Molality, mol/kg - 4; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid	Liquid	Vibrating tube method	55
POMD	1 4 3	Molar conductivity, S*m2/mol ; Liquid	Molality, mol/kg - 3; Liquid Solvent: Molality, mol/kg - 4; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid	Liquid	Alternating current cell with electrodes	40
POMD	1 4 3	Viscosity, Pa*s ; Liquid	Molality, mol/kg - 3; Liquid Solvent: Molality, mol/kg - 4; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid	Liquid	Capillary tube (Ostwald; Ubbelohde) method	50
POMD	1 4 3	Refractive index (Na D-line) ; Liquid	Molality, mol/kg - 3; Liquid Solvent: Molality, mol/kg - 4; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid	Liquid	Standard Abbe refractometry	50
POMD	1 4 2	Mass density, kg/m3 ; Liquid	Molality, mol/kg - 2; Liquid Solvent: Molality, mol/kg - 4; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid	Liquid	Vibrating tube method	55
POMD	1 4 2	Molar conductivity, S*m2/mol ; Liquid	Molality, mol/kg - 2; Liquid Solvent: Molality, mol/kg - 4; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid	Liquid	Metrohm model 712, Switzerland	40
POMD	1 4 2	Viscosity, Pa*s ; Liquid	Molality, mol/kg - 2; Liquid Solvent: Molality, mol/kg - 4; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid	Liquid	Capillary tube (Ostwald; Ubbelohde) method	50
POMD	1 4 2	Refractive index (Na D-line) ; Liquid	Molality, mol/kg - 2; Liquid Solvent: Molality, mol/kg - 4; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid	Liquid	Standard Abbe refractometry	50
POMD	1 3	Mass density, kg/m3 ; Liquid	Molality, mol/kg - 3; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid	Liquid	Vibrating tube method	10
POMD	1 3	Molar conductivity, S*m2/mol ; Liquid	Molality, mol/kg - 3; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid	Liquid	Alternating current cell with electrodes	10
POMD	1 3	Viscosity, Pa*s ; Liquid	Molality, mol/kg - 3; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid	Liquid	Capillary tube (Ostwald; Ubbelohde) method	10
POMD	1 3	Refractive index (Na D-line) ; Liquid	Molality, mol/kg - 3; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid	Liquid	Standard Abbe refractometry	10
POMD	1 4	Mass density, kg/m3 ; Liquid	Molality, mol/kg - 4; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid	Liquid	Vibrating tube method	8
POMD	1 2	Mass density, kg/m3 ; Liquid	Molality, mol/kg - 2; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid	Liquid	Vibrating tube method	10
POMD	1 2	Molar conductivity, S*m2/mol ; Liquid	Molality, mol/kg - 2; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid	Liquid	Metrohm model 712, Switzerland	10
POMD	1 2	Viscosity, Pa*s ; Liquid	Molality, mol/kg - 2; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid	Liquid	Capillary tube (Ostwald; Ubbelohde) method	10
POMD	1 2	Refractive index (Na D-line) ; Liquid	Molality, mol/kg - 2; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid	Liquid	Standard Abbe refractometry	10

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

Effect of N,N'-Bis(2-pyridylmethylidene)-1,2-diiminoethane (BPIE) Schiff Base on the Thermophysical Properties of Ionic Liquids in N,N-Dimethylformamide Solutions at 298.15 K

Shekaari, H.[Hemayat], Bezaatpour, A.[Abolfazl], Khoshalhan, M.[Maryam]

ABSTRACT