ABSTRACT

Density, rho, refractive index, nD, speed of sound, u, and viscosity, eta, of the betaine + dl-lactic acid (1:2), betaine + dl-lactic acid (1:5), betaine + dl-lactic acid-water (1:1:1), betaine-levulinic acid (1:2), betaine-citric acid-water (2:1:6), l-proline + levulinic acid (1:2) and l-proline + dl-lactic acid (1:1) deep eutectic solvents were measured at several temperatures from 293.15 K to 343.15 K and at atmospheric pressure. From the experimental data, coefficients of thermal expansion, alpha, isentropic compressibility, ks, and molar refraction, Rm, were calculated. Moreover the thermal behavior of these DESs, from glass transition to degradation temperature, was studied by differential scanning calorimetry and thermogravimetric analysis.

Compounds

#	Formula	Name
1	C5H9NO2	L-proline
2	C5H8O3	4-oxopentanoic acid
3	C3H6O3	2-hydroxypropanoic acid
4	C5H11NO2	(trimethylammonio)acetate
5	H2O	water
6	C6H8O7	citric acid

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 2	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid Mole fraction - 2; Liquid	Liquid	Vibrating tube method	11
POMD	1 2	Viscosity, Pa*s ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid Mole fraction - 2; Liquid	Liquid	Falling or rolling sphere viscometry	9
POMD	1 2	Speed of sound, m/s ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid Mole fraction - 2; Liquid Frequency, MHz; Liquid	Liquid	Single path-length method	11
POMD	1 2	Refractive index (Na D-line) ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid Mole fraction - 2; Liquid	Liquid	Standard Abbe refractometry	11
POMD	1 3	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid Mole fraction - 3; Liquid	Liquid	Vibrating tube method	11
POMD	1 3	Viscosity, Pa*s ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid Mole fraction - 3; Liquid	Liquid	Falling or rolling sphere viscometry	5
POMD	1 3	Speed of sound, m/s ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid Mole fraction - 3; Liquid Frequency, MHz; Liquid	Liquid	Single path-length method	10
POMD	1 3	Refractive index (Na D-line) ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid Mole fraction - 3; Liquid	Liquid	Standard Abbe refractometry	11
POMD	4 3	Mass density, kg/m3 ; Liquid	Mole fraction - 3; Liquid Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Vibrating tube method	21
POMD	4 3	Viscosity, Pa*s ; Liquid	Mole fraction - 3; Liquid Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Falling or rolling sphere viscometry	21
POMD	4 3	Speed of sound, m/s ; Liquid	Mole fraction - 3; Liquid Temperature, K; Liquid	Pressure, kPa; Liquid Frequency, MHz; Liquid	Liquid	Single path-length method	21
POMD	4 3	Refractive index (Na D-line) ; Liquid	Mole fraction - 3; Liquid Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Standard Abbe refractometry	22
POMD	4 2	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid Mole fraction - 2; Liquid	Liquid	Vibrating tube method	11
POMD	4 2	Viscosity, Pa*s ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid Mole fraction - 2; Liquid	Liquid	Falling or rolling sphere viscometry	10
POMD	4 2	Speed of sound, m/s ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid Mole fraction - 2; Liquid Frequency, MHz; Liquid	Liquid	Single path-length method	11
POMD	4 2	Refractive index (Na D-line) ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid Mole fraction - 2; Liquid	Liquid	Standard Abbe refractometry	11
POMD	4 3 5	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid Mole fraction - 4; Liquid Mole fraction - 5; Liquid	Liquid	Vibrating tube method	11
POMD	4 3 5	Viscosity, Pa*s ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid Mole fraction - 4; Liquid Mole fraction - 5; Liquid	Liquid	Falling or rolling sphere viscometry	11
POMD	4 3 5	Speed of sound, m/s ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid Mole fraction - 4; Liquid Mole fraction - 5; Liquid Frequency, MHz; Liquid	Liquid	Single path-length method	11
POMD	4 3 5	Refractive index (Na D-line) ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid Mole fraction - 4; Liquid Mole fraction - 5; Liquid	Liquid	Standard Abbe refractometry	11
POMD	4 6 5	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid Mole fraction - 4; Liquid Mole fraction - 5; Liquid	Liquid	Vibrating tube method	11
POMD	4 6 5	Viscosity, Pa*s ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid Mole fraction - 4; Liquid Mole fraction - 5; Liquid	Liquid	Falling or rolling sphere viscometry	9
POMD	4 6 5	Speed of sound, m/s ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid Mole fraction - 4; Liquid Mole fraction - 5; Liquid Frequency, MHz; Liquid	Liquid	Single path-length method	11
POMD	4 6 5	Refractive index (Na D-line) ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid Mole fraction - 4; Liquid Mole fraction - 5; Liquid	Liquid	Standard Abbe refractometry	11

Thermodynamics Research Center / ThermoML | Journal of Chemical Thermodynamics

Physical properties of seven deep eutectic solvents based on L-proline or betaine

Sanchez, Pablo B., Gonzalez, Begona, Salgado, Josefa, Parajo, Juan Jose, Dominguez, Angeles

ABSTRACT