2
0
2011
sin
kum
1
journal
Original
Singh, T.[Tejwant]
Kumar, A.[Arvind]
J. Chem. Thermodyn.
2011
2020-09-29
Thermodynamics of dilute aqueous solutions of imidazolium based ionic liquids
Experimental measurements of density, speed of sound and viscosity of aqueous solutions of various 1-alkyl-3-methylimidazolium based ionic liquid (IL) solutions have been performed in dilute concentration regime at 298.15 K to get insight into hydration behaviour of ILs. The investigated ILs are based on 1-alkyl-3-methylimidazolium cation, [Cnmim] having [BF4]-, [Cl]-, [C1OSO3]-, and [C8OSO3]- as anions where n = 4 or 8. Several thermodynamic parameters like apparent molar volume, isentropic compressibility, and viscosity B-coefficients have been derived from experimental data. Limiting value of apparent molar volume has been discussed in terms of intrinsic molar volume (Vint) molar electrostriction volume (Velec), molar disordered (Vdis), and cage volume (Vcage). Viscosity B-coefficients have been used to quantify the kosmotropic or chaotropic nature of ILs. Hydration number of ILs obtained using elctrostriction volume, isentropic compressibility, viscosity, and differential scanning calorimetry have been found to be comparative within the experimental error. The hydrophobic hydration has found to play an important role in hydration of ILs as compared to hydration due to hydrogen bonding and electrostriction. Limiting molar properties, hydration numbers, and B-coefficients have been discussed in terms of alkyl chain length of cation or nature of anion.
Ionic liquids
Apparent molar volume
Compressibility
Viscosity
Hydration
10.1016/j.jct.2011.01.013
6
43
958-965
1
InChI=1S/C12H23N2.BF4/c1-3-4-5-6-7-8-9-14-11-10-13(2)12-14;2-1(3,4)5/h10-12H,3-9H2,1-2H3;/q+1;-1
GXZCAMSPWNHTAE-UHFFFAOYSA-N
1-methyl-3-octylimidazolium tetrafluoroborate
1-methyl-3-octylimidazolium tetrafluoroborate [OMIM][BF4]
1-octyl-3-methylimidazolium tetrafluoroborate
3-methyl-1-octyl-1H-imidazol-3-ium tetrafluoroborate
C12H23BF4N2
1
Commercial source
1
98
2
Stated by supplier
2
0.02
1
Karl Fischer titration
2
InChI=1S/C8H15N2.ClH/c1-3-4-5-10-7-6-9(2)8-10;/h6-8H,3-5H2,1-2H3;1H/q+1;/p-1
FHDQNOXQSTVAIC-UHFFFAOYSA-M
1-butyl-3-methylimidazolium chloride
1-n-butyl-3-methylimidazolium chloride
C8H15ClN2
1
Commercial source
1
98
2
Stated by supplier
2
0.02
1
Karl Fischer titration
3
InChI=1S/C12H23N2.ClH/c1-3-4-5-6-7-8-9-14-11-10-13(2)12-14;/h10-12H,3-9H2,1-2H3;1H/q+1;/p-1
OXFBEEDAZHXDHB-UHFFFAOYSA-M
1-methyl-3-octylimidazolium chloride
1-octyl-3-methylimidazolium chloride
C12H23ClN2
1
Commercial source
1
98
2
Stated by supplier
2
0.02
1
Karl Fischer titration
4
InChI=1S/C8H15N2.CH4O4S/c1-3-4-5-10-7-6-9(2)8-10;1-5-6(2,3)4/h6-8H,3-5H2,1-2H3;1H3,(H,2,3,4)/q+1;/p-1
MEMNKNZDROKJHP-UHFFFAOYSA-M
1-butyl-3-methylimidazolium methyl sulfate
1-butyl-3-methyl-1H-imidazolium methyl sulfate
1-butyl-3-methylimidazolium methyl sulfate [BMIM][MeSO4]
C9H18N2O4S
1
Commercial source
1
98
2
Stated by supplier
2
0.02
1
Karl Fischer titration
5
InChI=1S/C8H15N2.BF4/c1-3-4-5-10-7-6-9(2)8-10;2-1(3,4)5/h6-8H,3-5H2,1-2H3;/q+1;-1
LSBXQLQATZTAPE-UHFFFAOYSA-N
1-butyl-3-methylimidazolium tetrafluoroborate
1-butyl-3-methyl-1H-imidazol-3-ium tetrafluoroborate
1-butyl-3-methylimidazolium tetrafluoroborate [BMIM][BF4]
1-n-butyl-3-methylimidazolium tetrafluoroborate
C8H15BF4N2
1
Commercial source
1
98
2
Stated by supplier
2
0.02
1
Karl Fischer titration
6
InChI=1S/C8H15N2.C8H18O4S/c1-3-4-5-10-7-6-9(2)8-10;1-2-3-4-5-6-7-8-12-13(9,10)11/h6-8H,3-5H2,1-2H3;2-8H2,1H3,(H,9,10,11)/q+1;/p-1
KIDIBVPFLKLKAH-UHFFFAOYSA-M
1-butyl-3-methylimidazolium octyl sulfate
1-butyl-3-methylimidazolium octylsulfate
[C4mim] [OcSO4]
C16H32N2O4S
1
Commercial source
1
98
2
Stated by supplier
2
0.02
1
Karl Fischer titration
7
InChI=1S/H2O/h1H2
XLYOFNOQVPJJNP-UHFFFAOYSA-N
water
H2O
1
Not stated in the document
1
De-gassed by boiling or ultrasonically
2
99.8
3
Estimated by the compiler
1
7
1
5
1
Principal objective of the work
KKT
TRC
8/3/2011
1
Viscosity, Pa*s
Capillary tube (Ostwald; Ubbelohde) method
Liquid
Direct value, X
7
1
Data file compiler
Propagation of evaluated standard uncertainties
95
Liquid
1
Temperature, K
Liquid
298.15
5
2
Pressure, kPa
Liquid
101
3
1
Molality, mol/kg
5
Liquid
1
0.00382
3
1
0.0008922
4
1
7.9e-06
1
0.01067
4
1
0.0008943
4
1
8e-06
1
0.02196
4
1
0.0008986
4
1
8e-06
1
0.03489
4
1
0.0009024
4
1
8e-06
1
0.04696
4
1
0.0009053
4
1
8e-06
1
0.05635
4
1
0.0009095
4
1
8e-06
1
0.0662
3
1
0.0009133
4
1
8e-06
1
0.07543
4
1
0.0009162
4
1
8e-06
1
0.08767
4
1
0.0009198
4
1
8.1e-06
1
0.09802
4
1
0.0009239
4
1
8.1e-06
2
7
1
5
1
Principal objective of the work
KKT
TRC
8/3/2011
1
Speed of sound, m/s
Sing-around technique in a fixed-path interferometer
Liquid
Direct value, X
7
1
Data file compiler
Propagation of evaluated standard uncertainties
95
Liquid
1
Temperature, K
Liquid
298.15
5
2
Pressure, kPa
Liquid
101
3
1
Molality, mol/kg
5
Liquid
1
0.0151
3
1
1497.7
5
1
0.9
1
0.0355
3
1
1499.1
5
1
0.9
1
0.0764
3
1
1502
5
1
1
1
0.1052
4
1
1504
5
1
1
1
0.1284
4
1
1505.5
5
1
1
1
0.1538
4
1
1507.3
5
1
1
1
0.1803
4
1
1509.1
5
1
1
1
0.2059
4
1
1510.9
5
1
1
1
0.2269
4
1
1512.3
5
1
1
1
0.2505
4
1
1513.9
5
1
1
3
7
1
5
1
Principal objective of the work
KKT
TRC
8/3/2011
1
Mass density, kg/m3
Vibrating tube method
Liquid
Direct value, X
7
1
Data file compiler
Propagation of evaluated standard uncertainties
95
Liquid
1
Temperature, K
Liquid
298.15
5
2
Pressure, kPa
Liquid
101
3
1
Molality, mol/kg
5
Liquid
1
0.0151
3
1
997.61
5
1
0.4
1
0.0355
3
1
998.36
5
1
0.4
1
0.0764
3
1
999.85
5
1
0.4
1
0.1052
4
1
1000.89
6
1
0.41
1
0.1284
4
1
1001.72
6
1
0.41
1
0.1538
4
1
1002.64
6
1
0.41
1
0.1803
4
1
1003.58
6
1
0.41
1
0.2059
4
1
1004.49
6
1
0.41
1
0.2269
4
1
1005.22
6
1
0.41
1
0.2505
4
1
1006.06
6
1
0.41
4
7
1
1
1
Principal objective of the work
KKT
TRC
8/3/2011
1
Viscosity, Pa*s
Capillary tube (Ostwald; Ubbelohde) method
Liquid
Direct value, X
7
1
Data file compiler
Propagation of evaluated standard uncertainties
95
Liquid
1
Temperature, K
Liquid
298.15
5
2
Pressure, kPa
Liquid
101
3
1
Molality, mol/kg
1
Liquid
1
0.00225
3
1
0.0008929
4
1
7.9e-06
1
0.00773
3
1
0.0008974
4
1
8e-06
1
0.01093
4
1
0.0008997
4
1
8e-06
1
0.01518
4
1
0.0009029
4
1
8e-06
1
0.01948
4
1
0.0009059
4
1
8e-06
1
0.02476
4
1
0.0009094
4
1
8e-06
1
0.0311
3
1
0.000914
4
1
8e-06
1
0.03923
4
1
0.0009201
4
1
8e-06
1
0.04705
4
1
0.0009255
4
1
8.1e-06
5
7
1
1
1
Principal objective of the work
KKT
TRC
8/3/2011
1
Speed of sound, m/s
Sing-around technique in a fixed-path interferometer
Liquid
Direct value, X
7
1
Data file compiler
Propagation of evaluated standard uncertainties
95
Liquid
1
Temperature, K
Liquid
298.15
5
2
Pressure, kPa
Liquid
101
3
1
Molality, mol/kg
1
Liquid
1
0.0045
2
1
1497.4
5
1
0.9
1
0.0058
2
1
1497.5
5
1
0.9
1
0.0077
2
1
1497.8
5
1
0.9
1
0.0112
3
1
1498.3
5
1
0.9
1
0.017
2
1
1499
5
1
0.9
1
0.0196
3
1
1499.4
5
1
0.9
1
0.0235
3
1
1499.9
5
1
0.9
1
0.0264
3
1
1500.3
5
1
0.9
1
0.0369
3
1
1501.7
5
1
1
1
0.0428
3
1
1502.5
5
1
1
1
0.0454
3
1
1502.9
5
1
1
6
7
1
1
1
Principal objective of the work
KKT
TRC
8/3/2011
1
Mass density, kg/m3
Vibrating tube method
Liquid
Direct value, X
7
1
Data file compiler
Propagation of evaluated standard uncertainties
95
Liquid
1
Temperature, K
Liquid
298.15
5
2
Pressure, kPa
Liquid
101
3
1
Molality, mol/kg
1
Liquid
1
0.0045
2
1
997.19
5
1
0.4
1
0.0058
2
1
997.23
5
1
0.4
1
0.0077
2
1
997.29
5
1
0.4
1
0.0112
3
1
997.4
4
1
0.4
1
0.017
2
1
997.58
5
1
0.4
1
0.0196
3
1
997.66
5
1
0.4
1
0.0235
3
1
997.78
5
1
0.4
1
0.0264
3
1
997.87
5
1
0.4
1
0.0369
3
1
998.19
5
1
0.4
1
0.0428
3
1
998.37
5
1
0.4
1
0.0454
3
1
998.45
5
1
0.4
7
7
1
2
1
Principal objective of the work
KKT
TRC
8/3/2011
1
Viscosity, Pa*s
Capillary tube (Ostwald; Ubbelohde) method
Liquid
Direct value, X
7
1
Data file compiler
Propagation of evaluated standard uncertainties
95
Liquid
1
Temperature, K
Liquid
298.15
5
2
Pressure, kPa
Liquid
101
3
1
Molality, mol/kg
2
Liquid
1
0.01554
4
1
0.0008981
4
1
8e-06
1
0.01952
4
1
0.0009005
4
1
8e-06
1
0.0252
3
1
0.0009024
4
1
8e-06
1
0.03495
4
1
0.0009062
4
1
8e-06
1
0.04454
4
1
0.0009101
4
1
8e-06
1
0.05402
4
1
0.0009143
4
1
8e-06
1
0.06772
4
1
0.0009197
4
1
8e-06
1
0.08128
4
1
0.0009258
4
1
8.1e-06
1
0.09508
4
1
0.0009323
4
1
8.1e-06
1
0.1132
4
1
0.0009412
4
1
8.1e-06
8
7
1
2
1
Principal objective of the work
KKT
TRC
8/3/2011
1
Speed of sound, m/s
Sing-around technique in a fixed-path interferometer
Liquid
Direct value, X
7
1
Data file compiler
Propagation of evaluated standard uncertainties
95
Liquid
1
Temperature, K
Liquid
298.15
5
2
Pressure, kPa
Liquid
101
3
1
Molality, mol/kg
2
Liquid
1
0.0123
3
1
1498.3
5
1
0.9
1
0.02
1
1
1499.3
5
1
0.9
1
0.0279
3
1
1500.3
5
1
0.9
1
0.0349
3
1
1501.2
5
1
0.9
1
0.0404
3
1
1501.9
5
1
0.9
1
0.0624
3
1
1504.8
5
1
1
1
0.107
3
1
1510.6
5
1
1
1
0.1175
4
1
1512
5
1
1
1
0.1296
4
1
1513.5
5
1
1
1
0.1521
4
1
1516.5
5
1
1
1
0.1677
4
1
1518.6
5
1
1
1
0.1852
4
1
1520.9
5
1
1
1
0.2113
4
1
1524.3
5
1
1
1
0.236
3
1
1527.6
5
1
1
1
0.2591
4
1
1530.7
5
1
1
1
0.2718
4
1
1532.4
5
1
1
9
7
1
2
1
Principal objective of the work
KKT
TRC
8/3/2011
1
Mass density, kg/m3
Vibrating tube method
Liquid
Direct value, X
7
1
Data file compiler
Propagation of evaluated standard uncertainties
95
Liquid
1
Temperature, K
Liquid
298.15
5
2
Pressure, kPa
Liquid
101
3
1
Molality, mol/kg
2
Liquid
1
0.0123
3
1
997.21
5
1
0.4
1
0.02
1
1
997.31
5
1
0.4
1
0.0279
3
1
997.41
5
1
0.4
1
0.0349
3
1
997.5
4
1
0.4
1
0.0404
3
1
997.57
5
1
0.4
1
0.0624
3
1
997.85
5
1
0.4
1
0.107
3
1
998.41
5
1
0.4
1
0.1175
4
1
998.54
5
1
0.4
1
0.1296
4
1
998.69
5
1
0.4
1
0.1521
4
1
998.97
5
1
0.4
1
0.1677
4
1
999.16
5
1
0.4
1
0.1852
4
1
999.38
5
1
0.4
1
0.2113
4
1
999.7
4
1
0.4
1
0.236
3
1
1000.01
6
1
0.41
1
0.2591
4
1
1000.29
6
1
0.41
1
0.2718
4
1
1000.45
6
1
0.41
10
7
1
3
1
Principal objective of the work
KKT
TRC
8/3/2011
1
Viscosity, Pa*s
Capillary tube (Ostwald; Ubbelohde) method
Liquid
Direct value, X
7
1
Data file compiler
Propagation of evaluated standard uncertainties
95
Liquid
1
Temperature, K
Liquid
298.15
5
2
Pressure, kPa
Liquid
101
3
1
Molality, mol/kg
3
Liquid
1
0.0074
2
1
0.0008986
4
1
8e-06
1
0.01484
4
1
0.0009052
4
1
8e-06
1
0.02425
4
1
0.0009131
4
1
8e-06
1
0.04255
4
1
0.0009281
4
1
8.1e-06
1
0.05607
4
1
0.0009387
4
1
8.1e-06
1
0.06607
4
1
0.000946
4
1
8.1e-06
1
0.07893
4
1
0.000956
4
1
8.2e-06
1
0.0928
3
1
0.000968
4
1
8.2e-06
1
0.10611
5
1
0.0009779
4
1
8.3e-06
11
7
1
3
1
Principal objective of the work
KKT
TRC
8/3/2011
1
Speed of sound, m/s
Sing-around technique in a fixed-path interferometer
Liquid
Direct value, X
7
1
Data file compiler
Propagation of evaluated standard uncertainties
95
Liquid
1
Temperature, K
Liquid
298.15
5
2
Pressure, kPa
Liquid
101
3
1
Molality, mol/kg
3
Liquid
1
0.0127
3
1
1499.2
5
1
0.9
1
0.017
2
1
1500
5
1
0.9
1
0.0272
3
1
1502
5
1
0.9
1
0.039
2
1
1504.4
5
1
1
1
0.0555
3
1
1507.5
5
1
1
1
0.0693
3
1
1510.1
5
1
1
1
0.0892
3
1
1513.8
5
1
1
1
0.1002
4
1
1515.7
5
1
1
1
0.1179
4
1
1518.5
5
1
1
1
0.1353
4
1
1521.5
5
1
1
1
0.1679
4
1
1526.8
5
1
1
1
0.183
3
1
1529.5
5
1
1
1
0.1948
4
1
1531.3
5
1
1
12
7
1
3
1
Principal objective of the work
KKT
TRC
8/3/2011
1
Mass density, kg/m3
Vibrating tube method
Liquid
Direct value, X
7
1
Data file compiler
Propagation of evaluated standard uncertainties
95
Liquid
1
Temperature, K
Liquid
298.15
5
2
Pressure, kPa
Liquid
101
3
1
Molality, mol/kg
3
Liquid
1
0.0127
3
1
997.14
5
1
0.4
1
0.017
2
1
997.17
5
1
0.4
1
0.0272
3
1
997.24
5
1
0.4
1
0.039
2
1
997.32
5
1
0.4
1
0.0555
3
1
997.43
5
1
0.4
1
0.0693
3
1
997.52
5
1
0.4
1
0.0892
3
1
997.65
5
1
0.4
1
0.1002
4
1
997.72
5
1
0.4
1
0.1179
4
1
997.83
5
1
0.4
1
0.1353
4
1
997.94
5
1
0.4
1
0.1679
4
1
998.14
5
1
0.4
1
0.183
3
1
998.23
5
1
0.4
1
0.1948
4
1
998.3
5
1
0.4
13
7
1
4
1
Principal objective of the work
KKT
TRC
8/3/2011
1
Viscosity, Pa*s
Capillary tube (Ostwald; Ubbelohde) method
Liquid
Direct value, X
7
1
Data file compiler
Propagation of evaluated standard uncertainties
95
Liquid
1
Temperature, K
Liquid
298.15
5
2
Pressure, kPa
Liquid
101
3
1
Molality, mol/kg
4
Liquid
1
0.00791
3
1
0.0008954
4
1
8e-06
1
0.01626
4
1
0.0008999
4
1
8e-06
1
0.02449
4
1
0.0009046
4
1
8e-06
1
0.0329
3
1
0.0009095
4
1
8e-06
1
0.04142
4
1
0.0009133
4
1
8e-06
1
0.0522
3
1
0.0009182
4
1
8e-06
1
0.06083
4
1
0.0009236
4
1
8.1e-06
1
0.07206
4
1
0.0009287
4
1
8.1e-06
1
0.08297
4
1
0.0009354
4
1
8.1e-06
1
0.09627
4
1
0.0009428
4
1
8.1e-06
14
7
1
4
1
Principal objective of the work
KKT
TRC
8/3/2011
1
Speed of sound, m/s
Sing-around technique in a fixed-path interferometer
Liquid
Direct value, X
7
1
Data file compiler
Propagation of evaluated standard uncertainties
95
Liquid
1
Temperature, K
Liquid
298.15
5
2
Pressure, kPa
Liquid
101
3
1
Molality, mol/kg
4
Liquid
1
0.0096
2
1
1497.95
6
1
0.94
1
0.0289
3
1
1500.45
6
1
0.95
1
0.0411
3
1
1502.02
6
1
0.95
1
0.0584
3
1
1504.25
6
1
0.95
1
0.0828
3
1
1507.24
6
1
0.96
1
0.1188
4
1
1511.96
6
1
0.96
1
0.1481
4
1
1515.7
5
1
1
1
0.1736
4
1
1518.98
6
1
0.97
1
0.2021
4
1
1522.61
6
1
0.98
1
0.2252
4
1
1525.56
6
1
0.98
15
7
1
4
1
Principal objective of the work
KKT
TRC
8/3/2011
1
Mass density, kg/m3
Vibrating tube method
Liquid
Direct value, X
7
1
Data file compiler
Propagation of evaluated standard uncertainties
95
Liquid
1
Temperature, K
Liquid
298.15
5
2
Pressure, kPa
Liquid
101
3
1
Molality, mol/kg
4
Liquid
1
0.0096
2
1
997.41
5
1
0.4
1
0.0289
3
1
998.13
5
1
0.4
1
0.0411
3
1
998.59
5
1
0.4
1
0.0584
3
1
999.23
5
1
0.4
1
0.0828
3
1
1000.11
6
1
0.4
1
0.1188
4
1
1001.49
6
1
0.41
1
0.1481
4
1
1002.58
6
1
0.41
1
0.1736
4
1
1003.51
6
1
0.41
1
0.2021
4
1
1004.58
6
1
0.41
1
0.2252
4
1
1005.44
6
1
0.41
16
7
1
6
1
Principal objective of the work
KKT
TRC
8/3/2011
1
Viscosity, Pa*s
Capillary tube (Ostwald; Ubbelohde) method
Liquid
Direct value, X
7
1
Data file compiler
Propagation of evaluated standard uncertainties
95
Liquid
1
Temperature, K
Liquid
298.15
5
2
Pressure, kPa
Liquid
101
3
1
Molality, mol/kg
6
Liquid
1
0.00921
3
1
0.0009054
4
1
8e-06
1
0.01899
4
1
0.0009173
4
1
8e-06
1
0.02803
4
1
0.0009278
4
1
8.1e-06
1
0.03646
4
1
0.0009388
4
1
8.1e-06
1
0.04596
4
1
0.0009507
4
1
8.2e-06
1
0.05551
4
1
0.0009615
4
1
8.2e-06
1
0.06482
4
1
0.0009748
4
1
8.2e-06
1
0.07522
4
1
0.0009873
4
1
8.3e-06
1
0.08499
4
1
0.0009986
4
1
8.3e-06
1
0.0981
3
1
0.0010151
5
1
8.4e-06
17
7
1
6
1
Principal objective of the work
KKT
TRC
8/3/2011
1
Speed of sound, m/s
Sing-around technique in a fixed-path interferometer
Liquid
Direct value, X
7
1
Data file compiler
Propagation of evaluated standard uncertainties
95
Liquid
1
Temperature, K
Liquid
298.15
5
2
Pressure, kPa
Liquid
101
3
1
Molality, mol/kg
6
Liquid
1
0.008
1
1
1498.5
5
1
0.9
1
0.0148
3
1
1500.1
5
1
0.9
1
0.0215
3
1
1501.6
5
1
1
1
0.0301
3
1
1503.6
5
1
1
1
0.035
2
1
1504.7
5
1
1
1
0.0423
3
1
1506.2
5
1
1
1
0.0492
3
1
1506.9
5
1
1
1
0.0668
3
1
1507.5
5
1
1
1
0.0888
3
1
1508.1
5
1
1
1
0.1542
4
1
1509.5
5
1
1
1
0.2466
4
1
1511.6
5
1
1
1
0.3369
4
1
1513.9
5
1
1
18
7
1
6
1
Principal objective of the work
KKT
TRC
8/3/2011
1
Mass density, kg/m3
Vibrating tube method
Liquid
Direct value, X
7
1
Data file compiler
Propagation of evaluated standard uncertainties
95
Liquid
1
Temperature, K
Liquid
298.15
5
2
Pressure, kPa
Liquid
101
3
1
Molality, mol/kg
6
Liquid
1
0.008
1
1
997.23
5
1
0.4
1
0.0148
3
1
997.38
5
1
0.4
1
0.0215
3
1
997.53
5
1
0.4
1
0.0301
3
1
997.72
5
1
0.4
1
0.035
2
1
997.83
5
1
0.4
1
0.0423
3
1
997.99
5
1
0.4
1
0.0492
3
1
998.14
5
1
0.4
1
0.0668
3
1
998.52
5
1
0.4
1
0.0888
3
1
998.99
5
1
0.4
1
0.1542
4
1
1000.35
6
1
0.41
1
0.2466
4
1
1002.19
6
1
0.41
1
0.3369
4
1
1003.92
6
1
0.41