Chem. J. Chinese Universities ›› 2025, Vol. 46 ›› Issue (7): 20240535.doi: 10.7503/cjcu20240535
• Physical Chemistry • Previous Articles Next Articles
WANG Zhiyuan, DONG Yi, QI Baohui, WEI Xueyang, ZHANG Jiahui, HUANG Qizhong, LI Jisheng, GAO Na, DI Shiying, HU Yufeng()
Received:
2024-12-09
Online:
2025-07-10
Published:
2025-01-18
Contact:
HU Yufeng
E-mail:huyf3581@sina.com
Supported by:
CLC Number:
TrendMD:
WANG Zhiyuan, DONG Yi, QI Baohui, WEI Xueyang, ZHANG Jiahui, HUANG Qizhong, LI Jisheng, GAO Na, DI Shiying, HU Yufeng. Determination of Acidic Ionic Liquid H0 and the Effect of Salt Effect[J]. Chem. J. Chinese Universities, 2025, 46(7): 20240535.
Cation | Abbreviation | Structure | Anion | Abbreviation | Structure |
---|---|---|---|---|---|
2⁃Pyrrolidone cation | [HNHP]+ | ![]() | Hydrogen sulfate anion | [HSO4] - | ![]() |
N⁃Methylpyrrolidone cation | [HNMP]+ | ![]() | Dihydrophosphate anion | [H2PO4] - | ![]() |
N⁃Octylpyrrolidone cation | [HNOP]+ | ![]() | Methanesulfonate anion | [MSA]- | ![]() |
N⁃Cyclohexylpyrrolidonecation | [HNCYP]+ | ![]() | Trifluoromethane sulfonate anion | [TFO]- | ![]() |
1⁃Methylimidazole cation | [MIM]+ | ![]() | p⁃Toluenesulfonic acid anion | [p⁃TSA]- | ![]() |
1⁃Propylsulfonic acid⁃3⁃methylimidazole cation | [C3SMIM]+ | ![]() | p⁃Chlorophenylsulfonate anion | [p⁃ClBSA]- | ![]() |
Table 1 Cations and anions of the ionic liquid used in this study
Cation | Abbreviation | Structure | Anion | Abbreviation | Structure |
---|---|---|---|---|---|
2⁃Pyrrolidone cation | [HNHP]+ | ![]() | Hydrogen sulfate anion | [HSO4] - | ![]() |
N⁃Methylpyrrolidone cation | [HNMP]+ | ![]() | Dihydrophosphate anion | [H2PO4] - | ![]() |
N⁃Octylpyrrolidone cation | [HNOP]+ | ![]() | Methanesulfonate anion | [MSA]- | ![]() |
N⁃Cyclohexylpyrrolidonecation | [HNCYP]+ | ![]() | Trifluoromethane sulfonate anion | [TFO]- | ![]() |
1⁃Methylimidazole cation | [MIM]+ | ![]() | p⁃Toluenesulfonic acid anion | [p⁃TSA]- | ![]() |
1⁃Propylsulfonic acid⁃3⁃methylimidazole cation | [C3SMIM]+ | ![]() | p⁃Chlorophenylsulfonate anion | [p⁃ClBSA]- | ![]() |
Ionic liquid | Amax | B fraction(%) | BH+ fraction(%) | H0 |
---|---|---|---|---|
p⁃Nitroaniline | 1.154 | 100.00 | 0 | — |
[HNHP][H2PO4] | 1.095 | 94.89 | 5.11 | 2.26 |
[HNHP][MSA] | 1.067 | 92.46 | 7.54 | 2.08 |
[HNHP][TFO] | 1.061 | 91.94 | 8.06 | 2.05 |
[HNHP][HSO4] | 1.008 | 87.35 | 12.65 | 1.83 |
[HNMP][MSA] | 1.056 | 91.51 | 8.49 | 2.02 |
[HNMP][p⁃TSA] | 1.053 | 91.25 | 8.75 | 2.01 |
[HNMP][p⁃ClBSA] | 1.039 | 90.03 | 9.97 | 1.95 |
[HNMP][TFO] | 1.010 | 87.52 | 12.48 | 1.84 |
[HNMP][HSO4] | 0.983 | 85.18 | 14.82 | 1.75 |
[HNOP][H2PO4] | 0.834 | 72.27 | 27.73 | 1.41 |
[HNOP][TFO] | 0.801 | 69.41 | 30.59 | 1.35 |
[HNOP][HSO4] | 0.725 | 62.82 | 37.18 | 1.22 |
[HNCYP][TFO] | 1.071 | 92.81 | 7.19 | 2.10 |
[HNCYP][p⁃TSA] | 1.106 | 95.84 | 4.16 | 2.35 |
Table 2 H0 of pyrrolidone, N-methyl pyrrolidone, N-octylpyrrolidone and N-cyclohexyl-2-pyrrolidone ionic liquids
Ionic liquid | Amax | B fraction(%) | BH+ fraction(%) | H0 |
---|---|---|---|---|
p⁃Nitroaniline | 1.154 | 100.00 | 0 | — |
[HNHP][H2PO4] | 1.095 | 94.89 | 5.11 | 2.26 |
[HNHP][MSA] | 1.067 | 92.46 | 7.54 | 2.08 |
[HNHP][TFO] | 1.061 | 91.94 | 8.06 | 2.05 |
[HNHP][HSO4] | 1.008 | 87.35 | 12.65 | 1.83 |
[HNMP][MSA] | 1.056 | 91.51 | 8.49 | 2.02 |
[HNMP][p⁃TSA] | 1.053 | 91.25 | 8.75 | 2.01 |
[HNMP][p⁃ClBSA] | 1.039 | 90.03 | 9.97 | 1.95 |
[HNMP][TFO] | 1.010 | 87.52 | 12.48 | 1.84 |
[HNMP][HSO4] | 0.983 | 85.18 | 14.82 | 1.75 |
[HNOP][H2PO4] | 0.834 | 72.27 | 27.73 | 1.41 |
[HNOP][TFO] | 0.801 | 69.41 | 30.59 | 1.35 |
[HNOP][HSO4] | 0.725 | 62.82 | 37.18 | 1.22 |
[HNCYP][TFO] | 1.071 | 92.81 | 7.19 | 2.10 |
[HNCYP][p⁃TSA] | 1.106 | 95.84 | 4.16 | 2.35 |
Ionic liquid | Amax | B fraction(%) | BH+ fraction(%) | H0 |
---|---|---|---|---|
m⁃Nitroaniline | 1.519 | 100.00 | 0 | — |
[MIM][H2PO4] | 1.504 | 98.99 | 1.01 | 4.49 |
[MIM][MSA] | 1.488 | 97.96 | 2.04 | 4.24 |
[MIM][TFO] | 1.489 | 98.00 | 2.00 | 4.19 |
[MIM][HSO4] | 1.447 | 95.23 | 4.77 | 3.86 |
p⁃Nitroaniline | 1.061 | 100.00 | 0 | — |
[C3SMIM][MSA] | 0.981 | 92.46 | 7.54 | 2.08 |
[C3SMIM][TFO] | 0.974 | 91.80 | 8.20 | 2.04 |
[C3SMIM][p⁃TSA] | 0.915 | 86.24 | 13.76 | 1.79 |
[C3SMIM][HSO4] | 0.914 | 86.15 | 13.85 | 1.78 |
Table 3 H0 of imidazolium-based ionic liquids
Ionic liquid | Amax | B fraction(%) | BH+ fraction(%) | H0 |
---|---|---|---|---|
m⁃Nitroaniline | 1.519 | 100.00 | 0 | — |
[MIM][H2PO4] | 1.504 | 98.99 | 1.01 | 4.49 |
[MIM][MSA] | 1.488 | 97.96 | 2.04 | 4.24 |
[MIM][TFO] | 1.489 | 98.00 | 2.00 | 4.19 |
[MIM][HSO4] | 1.447 | 95.23 | 4.77 | 3.86 |
p⁃Nitroaniline | 1.061 | 100.00 | 0 | — |
[C3SMIM][MSA] | 0.981 | 92.46 | 7.54 | 2.08 |
[C3SMIM][TFO] | 0.974 | 91.80 | 8.20 | 2.04 |
[C3SMIM][p⁃TSA] | 0.915 | 86.24 | 13.76 | 1.79 |
[C3SMIM][HSO4] | 0.914 | 86.15 | 13.85 | 1.78 |
Ionic liquid | H0 in aqueoussolution | H0 in dichloromethanesolution | Ionic liquid | H0 in aqueoussolution | H0 in dichloromethanesolution |
---|---|---|---|---|---|
[MIM][H2PO4] | 4.49 | 2.55 | [C3SMIM][HSO4] | 1.78 | 0.34 |
[MIM][HSO4] | 3.86 | 0.73 | [HNMP][p⁃ClBSA] | 1.95 | 0.71 |
[C3SMIM][TFO] | 2.04 | 0.01 | [HNMP][HSO4] | 1.75 | 0.52 |
Table 4 H0 of acidic ionic liquids in aqueous solution and dichloromethane solution
Ionic liquid | H0 in aqueoussolution | H0 in dichloromethanesolution | Ionic liquid | H0 in aqueoussolution | H0 in dichloromethanesolution |
---|---|---|---|---|---|
[MIM][H2PO4] | 4.49 | 2.55 | [C3SMIM][HSO4] | 1.78 | 0.34 |
[MIM][HSO4] | 3.86 | 0.73 | [HNMP][p⁃ClBSA] | 1.95 | 0.71 |
[C3SMIM][TFO] | 2.04 | 0.01 | [HNMP][HSO4] | 1.75 | 0.52 |
System | Amax | B fraction(%) | BH+ fraction(%) | H0 |
---|---|---|---|---|
p⁃Nitroaniline | 0.776 | 100.00 | 0 | — |
CH3SO3H | 0.330 | 42.57 | 57.43 | 0.860 |
CH3SO3H+NaCl | 0.319 | 41.12 | 58.88 | 0.834 |
CH3SO3H+MgCl2 | 0.299 | 38.58 | 61.42 | 0.788 |
CH3SO3H+C3SMIM | 0.414 | 53.39 | 46.61 | 1.049 |
CH3SO3H+CF3SO3Na | 0.311 | 40.12 | 59.88 | 0.816 |
CH3SO3H+CH3SO3Na | 0.322 | 41.45 | 58.55 | 0.840 |
CH3SO3H+C3SMIM+CH3SO3Na | 0.361 | 46.49 | 53.51 | 0.929 |
CH3SO3H+C3SMIM+CF3SO3Na | 0.335 | 43.14 | 56.86 | 0.870 |
CF3SO3H | 0.325 | 41.90 | 58.10 | 0.848 |
CF3SO3H+C3SMIM | 0.354 | 45.64 | 54.36 | 0.914 |
CF3SO3H+CF3SO3Na | 0.306 | 39.40 | 60.60 | 0.803 |
CF3SO3H+CF3SO3Na+C3SMIM | 0.332 | 42.74 | 57.26 | 0.863 |
Table 5 H0 of aqueous solution systems of CH3SO3H/CF3SO3H+salt
System | Amax | B fraction(%) | BH+ fraction(%) | H0 |
---|---|---|---|---|
p⁃Nitroaniline | 0.776 | 100.00 | 0 | — |
CH3SO3H | 0.330 | 42.57 | 57.43 | 0.860 |
CH3SO3H+NaCl | 0.319 | 41.12 | 58.88 | 0.834 |
CH3SO3H+MgCl2 | 0.299 | 38.58 | 61.42 | 0.788 |
CH3SO3H+C3SMIM | 0.414 | 53.39 | 46.61 | 1.049 |
CH3SO3H+CF3SO3Na | 0.311 | 40.12 | 59.88 | 0.816 |
CH3SO3H+CH3SO3Na | 0.322 | 41.45 | 58.55 | 0.840 |
CH3SO3H+C3SMIM+CH3SO3Na | 0.361 | 46.49 | 53.51 | 0.929 |
CH3SO3H+C3SMIM+CF3SO3Na | 0.335 | 43.14 | 56.86 | 0.870 |
CF3SO3H | 0.325 | 41.90 | 58.10 | 0.848 |
CF3SO3H+C3SMIM | 0.354 | 45.64 | 54.36 | 0.914 |
CF3SO3H+CF3SO3Na | 0.306 | 39.40 | 60.60 | 0.803 |
CF3SO3H+CF3SO3Na+C3SMIM | 0.332 | 42.74 | 57.26 | 0.863 |
System | Amax | B fraction(%) | BH+ fraction(%) | H0 |
---|---|---|---|---|
o⁃Nitroaniline | 2.828 | 100.00 | 0 | — |
H2SO4+Na2HPO4 | 2.797 | 98.90 | 1.10 | 1.665 |
H2SO4+NaH2PO4 | 2.646 | 93.56 | 6.44 | 0.873 |
H2SO4+Na2SO4 | 2.384 | 84.30 | 15.70 | 0.440 |
H2SO4 | 2.152 | 76.10 | 23.90 | 0.213 |
H2SO4+KCl | 1.902 | 67.26 | 32.74 | 0.023 |
H2SO4+NaCl | 1.799 | 63.61 | 36.39 | -0.047 |
H2SO4+LiCl | 1.763 | 62.34 | 37.66 | -0.071 |
H2SO4+ZnCl2 | 1.682 | 59.48 | 40.52 | -0.123 |
H2SO4+NaHSO4 | 1.484 | 52.48 | 47.52 | -0.247 |
H2SO4+MgCl2 | 1.346 | 47.60 | 52.40 | -0.332 |
Table 6 H0 of aqueous solution system of sulfuric acid+salt
System | Amax | B fraction(%) | BH+ fraction(%) | H0 |
---|---|---|---|---|
o⁃Nitroaniline | 2.828 | 100.00 | 0 | — |
H2SO4+Na2HPO4 | 2.797 | 98.90 | 1.10 | 1.665 |
H2SO4+NaH2PO4 | 2.646 | 93.56 | 6.44 | 0.873 |
H2SO4+Na2SO4 | 2.384 | 84.30 | 15.70 | 0.440 |
H2SO4 | 2.152 | 76.10 | 23.90 | 0.213 |
H2SO4+KCl | 1.902 | 67.26 | 32.74 | 0.023 |
H2SO4+NaCl | 1.799 | 63.61 | 36.39 | -0.047 |
H2SO4+LiCl | 1.763 | 62.34 | 37.66 | -0.071 |
H2SO4+ZnCl2 | 1.682 | 59.48 | 40.52 | -0.123 |
H2SO4+NaHSO4 | 1.484 | 52.48 | 47.52 | -0.247 |
H2SO4+MgCl2 | 1.346 | 47.60 | 52.40 | -0.332 |
System | Amax | B fraction(%) | BH+ fraction(%) | H0 |
---|---|---|---|---|
p⁃Nitroaniline | 0.776 | 100.00 | 0 | — |
H2SO4 | 0.250 | 32.22 | 67.78 | 0.667 |
H2SO4+[MIM][MSA] | 0.279 | 35.94 | 64.06 | 0.739 |
H2SO4+[MIM][TFO] | 0.254 | 32.72 | 67.28 | 0.677 |
H2SO4+[MIM][HSO4] | 0.238 | 30.68 | 69.32 | 0.636 |
H2SO4+[MIM][H2PO4] | 0.436 | 56.19 | 43.81 | 1.098 |
Table 7 H0 of aqueous solution systems of sulfuric acid+ionic liquids
System | Amax | B fraction(%) | BH+ fraction(%) | H0 |
---|---|---|---|---|
p⁃Nitroaniline | 0.776 | 100.00 | 0 | — |
H2SO4 | 0.250 | 32.22 | 67.78 | 0.667 |
H2SO4+[MIM][MSA] | 0.279 | 35.94 | 64.06 | 0.739 |
H2SO4+[MIM][TFO] | 0.254 | 32.72 | 67.28 | 0.677 |
H2SO4+[MIM][HSO4] | 0.238 | 30.68 | 69.32 | 0.636 |
H2SO4+[MIM][H2PO4] | 0.436 | 56.19 | 43.81 | 1.098 |
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