ABSTRACT

Enthalpies of solution and transfer of glycine, l-alanine, l-valine, l-serine and l-threonine from water to aqueous surfactant (sodium dodecyl sulfate or dodecyltrimethylammonium bromide) solutions have been determined at 298.15K by isothermal calorimetry. Dehydration and ion ion interactions are important at low concentrations of the surfactant. Hydrophobic hydrophobic interactions become primary when the amino acid molecules insert into the hydrophobic tail groups of the micelles. These phenomena can be explained with the hydration co-sphere overlap model.

Compounds

#	Formula	Name
1	H2O	water
2	C12H25NaO4S	sodium dodecyl sulfate
3	C15H34BrN	dodecyltrimethylammonium bromide
4	C2H5NO2	2-aminoacetic acid
5	C3H7NO2	(S)-2-aminopropanoic acid
6	C5H11NO2	L-valine
7	C3H7NO3	L-serine
8	C4H9NO3	L-threonine

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	4 1	Molar enthalpy of solution, kJ/mol ; Liquid	Molality, mol/kg - 4; Liquid Temperature, K; Liquid Pressure, kPa; Liquid		Liquid	ISOPERIBOL	1
POMD	5 1	Molar enthalpy of solution, kJ/mol ; Liquid	Molality, mol/kg - 5; Liquid Temperature, K; Liquid Pressure, kPa; Liquid		Liquid	ISOPERIBOL	1
POMD	6 1	Molar enthalpy of solution, kJ/mol ; Liquid	Molality, mol/kg - 6; Liquid Temperature, K; Liquid Pressure, kPa; Liquid		Liquid	ISOPERIBOL	1
POMD	7 1	Molar enthalpy of solution, kJ/mol ; Liquid	Molality, mol/kg - 7; Liquid Temperature, K; Liquid Pressure, kPa; Liquid		Liquid	ISOPERIBOL	1
POMD	8 1	Molar enthalpy of solution, kJ/mol ; Liquid	Molality, mol/kg - 8; Liquid Temperature, K; Liquid Pressure, kPa; Liquid		Liquid	ISOPERIBOL	1
POMD	4 2 1	Molar enthalpy of solution, kJ/mol ; Liquid	Solvent: Molality, mol/kg - 2; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid Molality, mol/kg - 4; Liquid	Liquid	ISOPERIBOL	10
POMD	5 2 1	Molar enthalpy of solution, kJ/mol ; Liquid	Solvent: Molality, mol/kg - 2; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid Molality, mol/kg - 5; Liquid	Liquid	ISOPERIBOL	10
POMD	6 2 1	Molar enthalpy of solution, kJ/mol ; Liquid	Solvent: Molality, mol/kg - 2; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid Molality, mol/kg - 6; Liquid	Liquid	ISOPERIBOL	10
POMD	7 2 1	Molar enthalpy of solution, kJ/mol ; Liquid	Solvent: Molality, mol/kg - 2; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid Molality, mol/kg - 7; Liquid	Liquid	ISOPERIBOL	10
POMD	8 2 1	Molar enthalpy of solution, kJ/mol ; Liquid	Solvent: Molality, mol/kg - 2; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid Molality, mol/kg - 8; Liquid	Liquid	ISOPERIBOL	10
POMD	4 3 1	Molar enthalpy of solution, kJ/mol ; Liquid	Solvent: Molality, mol/kg - 3; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid Molality, mol/kg - 4; Liquid	Liquid	ISOPERIBOL	10
POMD	5 3 1	Molar enthalpy of solution, kJ/mol ; Liquid	Solvent: Molality, mol/kg - 3; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid Molality, mol/kg - 5; Liquid	Liquid	ISOPERIBOL	10
POMD	6 3 1	Molar enthalpy of solution, kJ/mol ; Liquid	Solvent: Molality, mol/kg - 3; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid Molality, mol/kg - 6; Liquid	Liquid	ISOPERIBOL	10
POMD	7 3 1	Molar enthalpy of solution, kJ/mol ; Liquid	Solvent: Molality, mol/kg - 3; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid Molality, mol/kg - 7; Liquid	Liquid	ISOPERIBOL	10
POMD	8 3 1	Molar enthalpy of solution, kJ/mol ; Liquid	Solvent: Molality, mol/kg - 3; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid Molality, mol/kg - 8; Liquid	Liquid	ISOPERIBOL	10

Thermodynamics Research Center / ThermoML | Thermochimica Acta

A calorimetric study on interactions of amino acids with sodium dodecylsulfate and dodecyltrimethylammonium bromide in aqueous solutions at 298.15K

Qiu, X.[Xiaomei], Lei, Q.[Qunfang], Fang, W.[Wenjun], Lin, R.[Ruisen]

ABSTRACT