Electronic Supplementary Material for PCCP
This Journal is © The Owner Societies 2004
Supplementary data
The liquid-liquid coexistence of binary mixtures of the room temperature ionic liquid 1methyl-3-hexylimidazolium tetrafluoroborate with alcohols
Monika Wagner, Olimpiu Stanga and Wolffram Schröer
Institut für Anorganische und Physikalische Chemie, Universität Bremen, D 28359, Bremen,
Germany. E-mail: schroer@uni-bremen.de
Refractive index as function of the temperature in the homogeneous phase and in the two phase region for the mixtures of the RTIL C 6mim+BF4- with
alcanols. The critical temperatures are Tc = 303.64 K, 315.10 K, 303.05 K, and 317.32 K for the solutions in 1-butanol, 1-pentanol, 2-butanol, and 2pentanol, respectively. The upper phase is the alcohol-rich phase, which has the lower refractive index.
1-butanol
T/K
314.92
313.37
311.72
310.48
309.00
307.38
305.98
305.51
304.92
304.54
304.15
304.10
304.28
304.02
303.98
303.89
303.85
303.78
303.74
303.72
303.69
303.67
303.65
T/K
303.63
303.61
303.59
303.54
303.45
303.35
303.22
303.00
302.72
302.48
301.91
301.11
299.95
298.35
296.43
294.63
293.37
1-pentanol
n
1.39560
1.39605
1.39662
1.39712
1.39766
1.39820
1.39872
1.39889
1.39907
1.39923
1.39928
1.39928
1.39926
1.39929
1.39941
1.39942
1.39942
1.39943
1.39944
1.39944
1.39944
1.39945
1.39945
nu
1.39879
1.39814
1.39771
1.39738
1.39695
1.39664
1.39632
1.39602
1.39573
1.39554
1.39527
1.39515
1.39517
1.39524
1.39567
1.39607
1.39653
nl
1.40022
1.40087
1.40120
1.40175
1.40220
1.40265
1.40310
1.40367
1.40435
1.40492
1.40575
1.40692
1.40813
1.40971
1.41121
1.41246
1.41344
T/K
323.82
321.65
319.88
318.11
316.96
316.45
316.07
315.77
315.45
315.41
315.37
315.30
315.25
315.20
315.18
315.16
315.11
T/K
315.09
315.08
315.07
315.02
314.96
314.90
314.79
314.62
314.38
314.05
313.41
312.94
311.91
311.01
309.67
308.37
306.89
304.92
2-butanol
n
1.39983
1.40052
1.40125
1.40186
1.40215
1.40234
1.40251
1.40255
1.40282
1.40282
1.40283
1.40284
1.40285
1.40286
1.40297
1.40286
1.40298
nu
1.40233
1.40201
1.40190
1.40158
1.40137
1.40117
1.40097
1.40077
1.40059
1.40042
1.40030
1.40037
1.40041
1.40065
1.40084
1.40123
1.40165
1.40212
nl
1.40363
1.40396
1.40418
1.40440
1.40462
1.40496
1.40530
1.40565
1.40601
1.40659
1.40734
1.40784
1.40895
1.40962
1.41066
1.41148
1.41253
1.41354
T/K
314.64
313.19
311.38
309.69
308.85
307.75
307.17
306.48
305.72
305.25
304.88
304.56
304.17
303.74
303.30
303.20
303.15
303.13
303.11
303.09
303.06
T/K
303.04
303.02
302.98
302.93
302.89
302.80
302.69
302.56
302.37
301.98
301.87
301.43
300.65
299.69
298.20
296.17
293.58
2-pentanol
n
1.39339
1.39404
1.39464
1.39520
1.39565
1.39602
1.39620
1.39652
1.39683
1.39700
1.39716
1.39720
1.39736
1.39752
1.39769
1.39770
1.39770
1.39771
1.39771
1.39771
1.39772
nu
1.39635
1.39591
1.39569
1.39548
1.39527
1.39495
1.39474
1.39454
1.39434
1.39394
1.39385
1.39368
1.39355
1.39355
1.39371
1.39404
1.39496
nl
1.39909
1.39953
1.39975
1.40008
1.40041
1.40075
1.40120
1.40165
1.40211
1.40314
1.40326
1.40407
1.40525
1.40644
1.40790
1.40973
1.41182
T/K
328.09
325.48
323.30
320.96
319.91
319.23
318.66
318.13
318.00
317.83
317.66
317.51
317.47
317.39
317.37
317.325
T/K
317.315
317.30
317.28
317.24
317.20
317.09
316.92
316.69
316.39
316.07
315.45
314.86
313.62
312.26
310.93
309.52
307.19
305.33
n
1.39449
1.39551
1.39643
1.39726
1.39755
1.39777
1.39797
1.39816
1.39829
1.39832
1.39845
1.39848
1.39848
1.39850
1.39861
1.39861
nu
1.39774
1.39753
1.39731
1.39710
1.39678
1.39658
1.39627
1.39620
1.39603
1.39586
1.39574
1.39572
1.39590
1.39610
1.39651
1.39693
1.39768
1.39836
nl
1.39949
1.39971
1.40004
1.40026
1.40059
1.40094
1.40140
1.40198
1.40246
1.40305
1.40379
1.40442
1.40558
1.40686
1.40791
1.40897
1.41046
1.41167
Electronic Supplementary Material for PCCP
This Journal is © The Owner Societies 2004
Table 1 Parameters of the fits of the coexistence curve represented by the Lorenz-Lorentz function by a single exponential and by Wegner expansions
with up to two correction terms.
Solvent
β
B
B1
B2
χ2 10-9
1-butanol
1-pentanol
2-butanol
2-pentanol
0.2930 ± 0.0056
0.325
0.325
0.325
0.2773 ± 0.0038
0.325
0.325
0.325
0.2901 ± 0.0042
0.325
0.325
0.325
0.2935 ± 0.0045
0.325
0.325
0.325
0.0250 ± 0.0006
0.0287 ± 0.0003
0.0320 ± 0.0003
0.0312 ± 0.0006
0.0160 ± 0.0003
0.0198 ± 0.0003
0.0227 ± 0.0003
0.0237 ± 0.0005
0.0250 ± 0.0005
0.0295 ± 0.0004
0.0323 ± 0.0004
0.0325 ± 0.0008
0.0094 ± 0.0002
0.0108 ± 0.0001
0.0119 ± 0.0001
0.0118 ± 0.0003
-0.798 ±0 .062
-0.260 ± 0.344
-2.49 ± 1.56
-1.051 ± 0.096
-1.953 ± 0.414
4.38 ± 1.98
-0.776 ± 0.099
-0.975 ± 0.519
0.97 ± 2.47
-0.678 ± 0.076
-0.587 ± 0.412
-0.40 ± 1.76
24.1
72.3
7.67
6.91
5.72
53.4
8.45
6.93
12.7
65.8
15.7
16.7
2.45
9.05
1.89
2.01
Table 2 Parameters describing the diameter of the coexistence curves represented by the Lorenz-Lorentz function obtaind by fits using eqn. (7).
Solvent
1-butanol
1-pentanol
2-butanol
2-pentanol
Kc
A 10-2
0.24217 ± 0.00001
0.24212 ± 0.00001
0.24194 ± 0.00004
0.24213 ± 0.00001
0.24212 ± 0.00001
0.24403 ± 0.00001
0.24399 ± 0.00001
0.24385 ± 0.00004
0.24400 ± 0.00001
0.24399 ± 0.00001
0.24124 ± 0.00002
0.24118 ± 0.00001
0.24099 ± 0.00004
0.24117 ± 0.00001
0.24116 ± 0.00001
0.24171 ± 0.00001
0.24165 ± 0.00001
0.24145 ± 0.00005
0.24167 ± 0.00001
0.24166 ± 0.00001
8.718 ± 0.097
C 10-2
D 10-2
5.977 ± 0.033
2.633 ± 0.087
1.307 ± 1.053
6.754 ± 0.329
8.349 ± 0.098
5.082 ± 0.722
0.606 ± 0.100
5.648 ± 0.046
2.406 ± 0.086
2.116 ± 1.355
6.759 ± 0.427
9.730 ± 0.143
4.219 ± 0.916
0.469 ± 0.124
6.598 ± 0.033
2.829 ± 0.093
-0.652 ± 1.004
6.858 ± 0.301
9.036 ± 0.078
7.039 ± 0.680
0.854 ± 0.088
6.251 ± 0.035
2.803 ± 0.098
3.099 ± 0.745
7.409 ± 0.227
Coexistence curves of the solution of C6mim+BF4- in 1-butanol
represented by different variables (mole fraction (empty square), mass
fraction (circle), and volume fraction (triangle).
4.110 ± 0.515
0.517 ± 0.071
χ2 10-10
18.6
4.54
160
4.38
5.50
16.2
7.80
147
7.16
8.86
26.9
3.20
133
3.33
3.73
15.0
6.18
239
3.06
3.54
Electronic Supplementary Material for PCCP
This Journal is © The Owner Societies 2004
Table 6 Analysis of the diameter of the coexistence curves by fits with eqn. (7), where the mole fraction, the mass fraction or the volume fraction are
chosen as the variables of the composition.
Order parameter
Alcohol
Xc 10-2
1-butanol
11.93
1-pentanol
13.50
Mole fraction
C6mim+BF42-butanol
2-pentanol
1-butanol
1-pentanol
10.77
11.84
24.61
24.09
Volume fraction
C6mim+BF42-butanol
2-pentanol
1-butanol
1-pentanol
22.46
21.26
31.71
31.03
Mass fraction
C6mim+BF42-butanol
2-pentanol
29.26
27.90
Xc fit 10-2
12.25 ± 0.09
11.79 ± 0.03
11.94 ± 0.03
11.83 ± 0.04
13.74 ± 0.09
13.35 ± 0.06
13.49 ± 0.06
13.41 ± 0.08
10.93 ± 0.08
10.48 ± 0.03
10.64 ± 0.03
10.53 ± 0.04
12.25 ± 0.08
11.81 ± 0.03
12.00 ± 0.04
11.89 ± 0.04
24.77 ± 0.08
24.37 ± 0.05
24.52 ± 0.05
24.44 ± 0.07
24.12 ± 0.09
23.80 ± 0.09
23.93 ± 0.09
23.88 ± 0.12
22.39 ± 0.08
21.95 ± 0.04
22.09 ± 0.05
21.98 ± 0.06
21.66 ± 0.08
21.25 ± 0.04
21.41 ± 0.05
21.31 ± 0.06
31.58 ± 0.05
31.34 ± 0.07
31.54 ± 0.06
31.52 ± 0.08
30.78 ± 0.09
30.62 ± 0.10
30.75 ± 0.12
30.76 ± 0.13
28.90 ± 0.05
28.59 ± 0.05
28.74 ± 0.05
28.68 ± 0.06
28.12 ± 0.05
27.86 ± 0.05
28.01 ± 0.06
27.96 ± 0.07
A
C
D
χ2 10-7
1.479 ± 0.042
74
7.9
5.8
7.5
76
30
20
29
58
5.9
4.8
4.9
57
10
8.1
6.8
58
20
14
19
80
64
51
63
70
12
11
12
59
16
15
14
22
39
22
24
78
95
82
86
29
18
15
15
27
24
19
19
0.660 ± 0.006
-5.105 ± 0.384
0.161 ± 0.121
4.972 ± 0.263
0.612 ± 0.037
1.481 ± 0.045
0.640 ± 0.012
-4.839 ± 0.719
0.286 ± 0.246
4.749 ± 0.486
0.558 ± 0.072
1.509 ± 0.045
0.656 ± 0.006
-4.940 ± 0.381
0.220 ± 0.108
4.850 ± 0.258
0.593 ± 0.032
1.310 ± 0.033
0.596 ± 0.006
-3.792 ± 0.383
0.290 ± 0.100
3.929 ± 0.265
0.506 ± 0.031
1.299 ± 0.037
0.579 ± 0.010
-4.101 ± 0.600
0.276 ± 0.193
4.105 ± 0.411
0.496 ± 0.059
1.212 ± 0.047
0.522 ± 0.018
-3.649 ± 1.144
0.391 ± 0.361
3.676 ± 0.773
0.410 ± 0.105
1.479 ± 0.049
0.643 ± 0.009
-5.191 ± 0.578
0.124 ± 0.170
4.989 ± 0.391
0.608 ± 0.050
1.206 ± 0.034
0.549 ± 0.008
-3.618 ± 0.517
0.236 ± 0.144
3.706 ± 0.357
0.476 ± 0.045
0.807 ± 0.023
0.357 ± 0.014
-0.801 ± 0.749
0.686 ± 0.218
1.355 ± 0.513
0.151 ± 0.066
0.672 ± 0.046
0.287 ± 0.022
-0.684 ± 1.447
0.687 ± 0.421
1.134 ± 0.978
0.090 ± 0.122
1.029 ± 0.032
0.446 ± 0.011
-2.680 ± 0.664
0.353 ± 0.192
2.842 ± 0.450
0.345 ± 0.056
0.794 ± 0.023
0.359 ± 0.010
-1.591 ± 0.589
0.380 ± 0.167
1.892 ± 0.408
0.242 ± 0.052