ABSTRACT

Density and conductivity data for potassium perfluoroalkanesulfonate ((potassium perfluorobutanesulfonate (PFBS) and potassium perfluorooctanesulfonate (PFOS)) + dipeptide + water) systems were determined at different temperatures. The standard partial molar volume oVo 2;/ P, standard partial molar volume of transfer for dipeptide from water to aqueous potassium perfluoroalkanesulfonate solutions (DtVo), hydration number (NH), partial molar expansibility oEo / P and Hepler s constant for the dipeptides have been calculated from density data. Electrical conductivity was used to estimate the limiting molar conductivity (Ko), Walden product (Kog) and energy of activation of the transfer process (Ea) of potassium perfluoroalkanesulfonate in aqueous dipeptide solutions. Effects of temperature and the hydrocarbon chain length of the dipeptides on the volumetric and conductometric properties were examined. The results have been interpreted in terms of solute solvent interactions and structural changes in the mixed solutions.

Compounds

#	Formula	Name
1	C4H8N2O3	glycylglycine
2	C7H14N2O3	glycyl-L-valine
3	C8H16N2O3	glycyl-L-leucine
4	C7H13N3O4	glycyl-l-glutamine
5	C8H15N3O4	L-alanyl-L-glutamine
6	H2O	water
7	C4F9KO3S	potassium perfluorobutanesulfonate
8	C8F17KO3S	potassium perfluorooctanesulfonate

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 6 7	Mass density, kg/m3 ; Liquid	Molality, mol/kg - 1; Liquid Temperature, K; Liquid	Pressure, kPa; Liquid Solvent: Molality, mol/kg - 7; Liquid	Liquid	Pycnometric method	40
POMD	1 6 7	Electrical conductivity, S/m ; Liquid	Temperature, K; Liquid Solvent: Molality, mol/kg - 1; Liquid Molality, mol/kg - 7; Liquid	Pressure, kPa; Liquid	Liquid	Alternating current cell with electrodes	394
POMD	2 6 7	Mass density, kg/m3 ; Liquid	Molality, mol/kg - 2; Liquid Temperature, K; Liquid	Pressure, kPa; Liquid Solvent: Molality, mol/kg - 7; Liquid	Liquid	Pycnometric method	38
POMD	2 6 7	Electrical conductivity, S/m ; Liquid	Temperature, K; Liquid Solvent: Molality, mol/kg - 2; Liquid Molality, mol/kg - 7; Liquid	Pressure, kPa; Liquid	Liquid	Alternating current cell with electrodes	394
POMD	3 6 7	Mass density, kg/m3 ; Liquid	Molality, mol/kg - 3; Liquid Temperature, K; Liquid	Pressure, kPa; Liquid Solvent: Molality, mol/kg - 7; Liquid	Liquid	Pycnometric method	40
POMD	3 6 7	Electrical conductivity, S/m ; Liquid	Temperature, K; Liquid Solvent: Molality, mol/kg - 3; Liquid Molality, mol/kg - 7; Liquid	Pressure, kPa; Liquid	Liquid	Alternating current cell with electrodes	394
POMD	6 4 7	Mass density, kg/m3 ; Liquid	Molality, mol/kg - 4; Liquid Temperature, K; Liquid	Pressure, kPa; Liquid Solvent: Molality, mol/kg - 7; Liquid	Liquid	Pycnometric method	40
POMD	6 4 7	Electrical conductivity, S/m ; Liquid	Temperature, K; Liquid Solvent: Molality, mol/kg - 4; Liquid Molality, mol/kg - 7; Liquid	Pressure, kPa; Liquid	Liquid	Alternating current cell with electrodes	412
POMD	6 7 5	Mass density, kg/m3 ; Liquid	Molality, mol/kg - 5; Liquid Temperature, K; Liquid	Pressure, kPa; Liquid Solvent: Molality, mol/kg - 7; Liquid	Liquid	Pycnometric method	40
POMD	6 7 5	Electrical conductivity, S/m ; Liquid	Temperature, K; Liquid Solvent: Molality, mol/kg - 5; Liquid Molality, mol/kg - 7; Liquid	Pressure, kPa; Liquid	Liquid	Alternating current cell with electrodes	400
POMD	1 8 6	Mass density, kg/m3 ; Liquid	Molality, mol/kg - 1; Liquid Temperature, K; Liquid	Pressure, kPa; Liquid Solvent: Molality, mol/kg - 8; Liquid	Liquid	Pycnometric method	44
POMD	1 8 6	Electrical conductivity, S/m ; Liquid	Temperature, K; Liquid Solvent: Molality, mol/kg - 1; Liquid Molality, mol/kg - 8; Liquid	Pressure, kPa; Liquid	Liquid	Alternating current cell with electrodes	447
POMD	2 8 6	Mass density, kg/m3 ; Liquid	Molality, mol/kg - 2; Liquid Temperature, K; Liquid	Pressure, kPa; Liquid Solvent: Molality, mol/kg - 8; Liquid	Liquid	Pycnometric method	44
POMD	2 8 6	Electrical conductivity, S/m ; Liquid	Temperature, K; Liquid Solvent: Molality, mol/kg - 2; Liquid Molality, mol/kg - 8; Liquid	Pressure, kPa; Liquid	Liquid	Alternating current cell with electrodes	446
POMD	3 8 6	Mass density, kg/m3 ; Liquid	Molality, mol/kg - 3; Liquid Temperature, K; Liquid	Pressure, kPa; Liquid Solvent: Molality, mol/kg - 8; Liquid	Liquid	Pycnometric method	43
POMD	3 8 6	Electrical conductivity, S/m ; Liquid	Temperature, K; Liquid Solvent: Molality, mol/kg - 3; Liquid Molality, mol/kg - 8; Liquid	Pressure, kPa; Liquid	Liquid	Alternating current cell with electrodes	434
POMD	8 6 4	Mass density, kg/m3 ; Liquid	Molality, mol/kg - 4; Liquid Temperature, K; Liquid	Pressure, kPa; Liquid Solvent: Molality, mol/kg - 8; Liquid	Liquid	Pycnometric method	44
POMD	8 6 4	Electrical conductivity, S/m ; Liquid	Temperature, K; Liquid Solvent: Molality, mol/kg - 4; Liquid Molality, mol/kg - 8; Liquid	Pressure, kPa; Liquid	Liquid	Alternating current cell with electrodes	461
POMD	8 6 5	Mass density, kg/m3 ; Liquid	Molality, mol/kg - 5; Liquid Temperature, K; Liquid	Pressure, kPa; Liquid Solvent: Molality, mol/kg - 8; Liquid	Liquid	Pycnometric method	44
POMD	8 6 5	Electrical conductivity, S/m ; Liquid	Temperature, K; Liquid Solvent: Molality, mol/kg - 5; Liquid Molality, mol/kg - 8; Liquid	Pressure, kPa; Liquid	Liquid	Alternating current cell with electrodes	471
POMD	6 7	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid Molality, mol/kg - 7; Liquid	Liquid	Pycnometric method	5
POMD	6 7	Electrical conductivity, S/m ; Liquid	Temperature, K; Liquid Molality, mol/kg - 7; Liquid	Pressure, kPa; Liquid	Liquid	Alternating current cell with electrodes	75
POMD	8 6	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid Molality, mol/kg - 8; Liquid	Liquid	Pycnometric method	6
POMD	8 6	Electrical conductivity, S/m ; Liquid	Temperature, K; Liquid Molality, mol/kg - 8; Liquid	Pressure, kPa; Liquid	Liquid	Alternating current cell with electrodes	86
POMD	1 6	Electrical conductivity, S/m ; Liquid	Temperature, K; Liquid Molality, mol/kg - 1; Liquid	Pressure, kPa; Liquid	Liquid	Alternating current cell with electrodes	21
POMD	2 6	Electrical conductivity, S/m ; Liquid	Temperature, K; Liquid Molality, mol/kg - 2; Liquid	Pressure, kPa; Liquid	Liquid	Alternating current cell with electrodes	20
POMD	3 6	Electrical conductivity, S/m ; Liquid	Temperature, K; Liquid Molality, mol/kg - 3; Liquid	Pressure, kPa; Liquid	Liquid	Alternating current cell with electrodes	21
POMD	6 4	Electrical conductivity, S/m ; Liquid	Temperature, K; Liquid Molality, mol/kg - 4; Liquid	Pressure, kPa; Liquid	Liquid	Alternating current cell with electrodes	23
POMD	6 5	Electrical conductivity, S/m ; Liquid	Temperature, K; Liquid Molality, mol/kg - 5; Liquid	Pressure, kPa; Liquid	Liquid	Alternating current cell with electrodes	20

Thermodynamics Research Center / ThermoML | Journal of Chemical Thermodynamics

Volumetric and conductometric studies on the interactions of dipeptides with potassium perfluoroalkanesulfonate in aqueous solution at different temperatures

Yan, Z.[Zhenning], Wen, X.[Xiangli], Kang, Y.[Yunxia], Zhang, S.[Shuangyan], Wu, S.[Shuangyan]

ABSTRACT