ABSTRACT

The values of apparent molar volume V2;/ and apparent molar adiabatic compressibility KS;2;/ of amino acids glycine, L-alanine, DL-a-amino-n-butyric acid, L-valine, L-leucine and peptides glycyl-glycine, glycyl-glycyl-glycine and glycyl-leucine have been determined in aqueous solutions of cationic surfactants dodecyltrimethylammonium bromide (DTAB) and tetradecyltrimethylammonium bromide (TTAB) by means of density and sound velocity measurements. The heat evolved or absorbed (q) during the course of interactions of amino acids and peptides with the aqueous solutions of surfactants were determined by isothermal titration calorimetry at T = 298.15 K. The values of standard partial molar volume V0 2;m and standard partial molar adiabatic compressibility K0s ;2;m at infinite dilution were calculated from the values of V2;/ and KS;2;/. Similarly the values of limiting enthalpies of dilution (DdilH0) of the amino acids/peptides were calculated from heat evolved or absorbed during calorimetric experiments. The standard partial molar quantities of transfer from water to aqueous surfactant solutions have been used to identify the interactions of amino acids and peptides with surfactants in terms of ionic ionic, ionic hydrophobic and hydrophobic hydrophobic group interactions.

Compounds

#	Formula	Name
1	C2H5NO2	2-aminoacetic acid
2	C3H7NO2	DL-2-aminopropanoic acid
3	C4H9NO2	(.+-.)-.alpha.-aminobutyric acid
4	C5H11NO2	L-valine
5	C6H13NO2	L-leucine
6	C4H8N2O3	glycylglycine
7	C6H11N3O4	glycylglycylglycine
8	C8H16N2O3	glycyl-L-leucine
9	C15H34BrN	dodecyltrimethylammonium bromide
10	C17H38BrN	tetradecyltrimethylammonium bromide
11	H2O	water

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 9 11	Mass density, kg/m3 ; Liquid	Molality, mol/kg - 1; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid Solvent: Amount concentration (molarity), mol/dm3 - 9; Liquid	Liquid	Vibrating tube method	9
POMD	1 9 11	Speed of sound, m/s ; Liquid	Molality, mol/kg - 1; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid Solvent: Amount concentration (molarity), mol/dm3 - 9; Liquid	Liquid	Sing-around technique in a fixed-path interferometer	9
POMD	2 9 11	Mass density, kg/m3 ; Liquid	Molality, mol/kg - 2; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid Solvent: Amount concentration (molarity), mol/dm3 - 9; Liquid	Liquid	Vibrating tube method	9
POMD	2 9 11	Speed of sound, m/s ; Liquid	Molality, mol/kg - 2; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid Solvent: Amount concentration (molarity), mol/dm3 - 9; Liquid	Liquid	Sing-around technique in a fixed-path interferometer	9
POMD	9 3 11	Mass density, kg/m3 ; Liquid	Molality, mol/kg - 3; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid Solvent: Amount concentration (molarity), mol/dm3 - 9; Liquid	Liquid	Vibrating tube method	7
POMD	9 3 11	Speed of sound, m/s ; Liquid	Molality, mol/kg - 3; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid Solvent: Amount concentration (molarity), mol/dm3 - 9; Liquid	Liquid	Sing-around technique in a fixed-path interferometer	7
POMD	4 9 11	Mass density, kg/m3 ; Liquid	Molality, mol/kg - 4; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid Solvent: Amount concentration (molarity), mol/dm3 - 9; Liquid	Liquid	Vibrating tube method	10
POMD	4 9 11	Speed of sound, m/s ; Liquid	Molality, mol/kg - 4; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid Solvent: Amount concentration (molarity), mol/dm3 - 9; Liquid	Liquid	Sing-around technique in a fixed-path interferometer	10
POMD	5 9 11	Mass density, kg/m3 ; Liquid	Molality, mol/kg - 5; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid Solvent: Amount concentration (molarity), mol/dm3 - 9; Liquid	Liquid	Vibrating tube method	10
POMD	5 9 11	Speed of sound, m/s ; Liquid	Molality, mol/kg - 5; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid Solvent: Amount concentration (molarity), mol/dm3 - 9; Liquid	Liquid	Sing-around technique in a fixed-path interferometer	10
POMD	6 9 11	Mass density, kg/m3 ; Liquid	Molality, mol/kg - 6; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid Solvent: Amount concentration (molarity), mol/dm3 - 9; Liquid	Liquid	Vibrating tube method	8
POMD	6 9 11	Speed of sound, m/s ; Liquid	Molality, mol/kg - 6; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid Solvent: Amount concentration (molarity), mol/dm3 - 9; Liquid	Liquid	Sing-around technique in a fixed-path interferometer	8
POMD	7 9 11	Mass density, kg/m3 ; Liquid	Molality, mol/kg - 7; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid Solvent: Amount concentration (molarity), mol/dm3 - 9; Liquid	Liquid	Vibrating tube method	8
POMD	7 9 11	Speed of sound, m/s ; Liquid	Molality, mol/kg - 7; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid Solvent: Amount concentration (molarity), mol/dm3 - 9; Liquid	Liquid	Sing-around technique in a fixed-path interferometer	8
POMD	8 9 11	Mass density, kg/m3 ; Liquid	Molality, mol/kg - 8; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid Solvent: Amount concentration (molarity), mol/dm3 - 9; Liquid	Liquid	Vibrating tube method	9
POMD	8 9 11	Speed of sound, m/s ; Liquid	Molality, mol/kg - 8; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid Solvent: Amount concentration (molarity), mol/dm3 - 9; Liquid	Liquid	Sing-around technique in a fixed-path interferometer	9
POMD	1 10 11	Mass density, kg/m3 ; Liquid	Molality, mol/kg - 1; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid Solvent: Amount concentration (molarity), mol/dm3 - 10; Liquid	Liquid	Vibrating tube method	9
POMD	1 10 11	Speed of sound, m/s ; Liquid	Molality, mol/kg - 1; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid Solvent: Amount concentration (molarity), mol/dm3 - 10; Liquid	Liquid	Sing-around technique in a fixed-path interferometer	9
POMD	2 10 11	Mass density, kg/m3 ; Liquid	Molality, mol/kg - 2; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid Solvent: Amount concentration (molarity), mol/dm3 - 10; Liquid	Liquid	Vibrating tube method	9
POMD	2 10 11	Speed of sound, m/s ; Liquid	Molality, mol/kg - 2; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid Solvent: Amount concentration (molarity), mol/dm3 - 10; Liquid	Liquid	Sing-around technique in a fixed-path interferometer	9
POMD	10 3 11	Mass density, kg/m3 ; Liquid	Molality, mol/kg - 3; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid Solvent: Amount concentration (molarity), mol/dm3 - 10; Liquid	Liquid	Vibrating tube method	9
POMD	10 3 11	Speed of sound, m/s ; Liquid	Molality, mol/kg - 3; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid Solvent: Amount concentration (molarity), mol/dm3 - 10; Liquid	Liquid	Sing-around technique in a fixed-path interferometer	9
POMD	4 10 11	Mass density, kg/m3 ; Liquid	Molality, mol/kg - 4; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid Solvent: Amount concentration (molarity), mol/dm3 - 10; Liquid	Liquid	Vibrating tube method	9
POMD	4 10 11	Speed of sound, m/s ; Liquid	Molality, mol/kg - 4; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid Solvent: Amount concentration (molarity), mol/dm3 - 10; Liquid	Liquid	Sing-around technique in a fixed-path interferometer	9
POMD	5 10 11	Mass density, kg/m3 ; Liquid	Molality, mol/kg - 5; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid Solvent: Amount concentration (molarity), mol/dm3 - 10; Liquid	Liquid	Vibrating tube method	10
POMD	5 10 11	Speed of sound, m/s ; Liquid	Molality, mol/kg - 5; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid Solvent: Amount concentration (molarity), mol/dm3 - 10; Liquid	Liquid	Sing-around technique in a fixed-path interferometer	10
POMD	6 10 11	Mass density, kg/m3 ; Liquid	Molality, mol/kg - 6; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid Solvent: Amount concentration (molarity), mol/dm3 - 10; Liquid	Liquid	Vibrating tube method	8
POMD	6 10 11	Speed of sound, m/s ; Liquid	Molality, mol/kg - 6; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid Solvent: Amount concentration (molarity), mol/dm3 - 10; Liquid	Liquid	Sing-around technique in a fixed-path interferometer	8
POMD	7 10 11	Mass density, kg/m3 ; Liquid	Molality, mol/kg - 7; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid Solvent: Amount concentration (molarity), mol/dm3 - 10; Liquid	Liquid	Vibrating tube method	9
POMD	7 10 11	Speed of sound, m/s ; Liquid	Molality, mol/kg - 7; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid Solvent: Amount concentration (molarity), mol/dm3 - 10; Liquid	Liquid	Sing-around technique in a fixed-path interferometer	9
POMD	8 10 11	Mass density, kg/m3 ; Liquid	Molality, mol/kg - 8; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid Solvent: Amount concentration (molarity), mol/dm3 - 10; Liquid	Liquid	Vibrating tube method	9
POMD	8 10 11	Speed of sound, m/s ; Liquid	Molality, mol/kg - 8; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid Solvent: Amount concentration (molarity), mol/dm3 - 10; Liquid	Liquid	Sing-around technique in a fixed-path interferometer	9
POMD	9 11	Mass density, kg/m3 ; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid Amount concentration (molarity), mol/dm3 - 9; Liquid		Liquid	Vibrating tube method	1
POMD	9 11	Speed of sound, m/s ; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid Amount concentration (molarity), mol/dm3 - 9; Liquid		Liquid	Sing-around technique in a fixed-path interferometer	1
POMD	10 11	Mass density, kg/m3 ; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid Amount concentration (molarity), mol/dm3 - 10; Liquid		Liquid	Vibrating tube method	1
POMD	10 11	Speed of sound, m/s ; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid Amount concentration (molarity), mol/dm3 - 10; Liquid		Liquid	Sing-around technique in a fixed-path interferometer	1

Thermodynamics Research Center / ThermoML | Journal of Chemical Thermodynamics

Thermodynamics of the interactions of some amino acids and peptides with dodecyltrimethylammonium bromide and tetradecyltrimethylammonium bromide

Talele, P.[Paurnima], Kishore, N.[Nand]

ABSTRACT