scholarly journals Solvatochromic And Fluorescence Spectroscopic Studies On Polarity Of Ionic Liquid And Ionic Liquid-Based Binary Systems

2013 ◽  
Vol 25 (2) ◽  
pp. 146-158 ◽  
Author(s):  
Kumkum Ahmed ◽  
Anika Auni ◽  
Gulshan Ara ◽  
MM Rahman ◽  
M Yousuf Aa Mollah ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Binary Mixtures ◽  
Binary Systems ◽  
Spectroscopic Method ◽  
Specific Interaction ◽  
Chemical Society ◽  
Spectroscopic Studies ◽  
The Other ◽  
Relative Merit ◽  
Molecular Solvents

Polarity behavior of a hydrophobic ionic liquid (IL) 1-ethyl-3-methylimidazolium bis(trifluoromethyl)sulphonylimide [EMI][TFSI] and binary mixtures of [EMI][TFSI] with ethanol, acetone and dichloromethane was investigated by solvatochromic method using Reichardt’s betaine dye. Fluorescence spectroscopic method using pyrene as a probe was also used for estimation of polarity of [EMI][TFSI] and [EMI][TFSI]-based binary systems. The binary mixtures of [EMI][TFSI] with the molecular solvents interestingly showed increase in polarity with increasing [EMI][TFSI] for all compositions. The comparative and contrastive features of the results of two methods have been discussed to judge relative merit of one method over the other. Both of the methods collectively provided information to correlate specific interaction of the IL with molecular solvents and define polarity behavior. Journal of Bangladesh Chemical Society, Vol. 25(2), 146-158, 2012 DOI: http://dx.doi.org/10.3329/jbcs.v25i2.15067

scholarly journals The Influence of the Nature of Redox-Active Moieties on the Properties of Redox-Active Ionic Liquids and on Their Use as Electrolyte for Supercapacitors

Energies ◽  
2021 ◽  
Vol 14 (19) ◽  
pp. 6344
Author(s):  
Philipp S. Borchers ◽  
Patrick Gerlach ◽  
Yihan Liu ◽  
Martin D. Hager ◽  
Andrea Balducci ◽  
...  
Keyword(s):  
Phase Transition ◽  
Differential Scanning Calorimetry ◽  
Ionic Liquid ◽  
Ionic Liquids ◽  
Binary Mixtures ◽  
Thermal Characteristics ◽  
The Other ◽  
Scanning Calorimetry ◽  
Imidazolium Ionic Liquids ◽  
Redox Active

In this work, two new redox-active ionic liquids, one based on 2,2,6,6-tetramethylpiperidine-N-oxide and the other based on 4,4′-bipyridine, are synthesized and characterized. A ferrocene-based redox-active ionic liquid is used for referencing the results. All ionic liquids are formed via salt-metathesis from halogenate to bis(trifluoromethylsulfonyl)imide. Their fundamental thermal characteristics are assessed with differential scanning calorimetry. While the imidazolium ionic liquids show no melting point, the phase transition is well observable for the viologen-based ionic liquid. The properties of the neat redox-active ionic liquids and of binary mixtures containing these ionic liquids (0.1 m) and 1-butyl-1-methyl pyrrolidinium-bis(trifluoromethylsulfonyl)imide have been investigated. Finally, the use of these binary mixtures in combination with activated carbon-based electrodes has been considered in view of the use of these redox-active electrolytes in supercapacitors.

Solvatochromism of Binary Mixtures of 2,2,2-Trifluoroethanol + Ionic Liquid [bmim][Tf2N]: A Comparative Study with Molecular Solvents

2019 ◽  
Vol 64 (3) ◽  
pp. 1140-1154 ◽  
Author(s):  
Md Rabiul Islam ◽  
Faiz Warsi ◽  
Abbul Bashar Khan ◽  
Tasneem Kausar ◽  
Imran Khan ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Comparative Study ◽  
Binary Mixtures ◽  
Molecular Solvents

Thermodynamic Study of Binary Mixtures of 1-Butyl-1-methylpyrrolidinium Dicyanamide Ionic Liquid with Molecular Solvents: New Experimental Data and Modeling with PC-SAFT Equation of State

2015 ◽  
Vol 119 (2) ◽  
pp. 543-551 ◽  
Author(s):  
Kamil Paduszyński ◽  
Elena Vadimovna Lukoshko ◽  
Marek Królikowski ◽  
Urszula Domańska ◽  
Jerzy Szydłowski
Keyword(s):  
Experimental Data ◽  
Ionic Liquid ◽  
Equation Of State ◽  
Binary Mixtures ◽  
Thermodynamic Study ◽  
Molecular Solvents

Viscosity of Methylbenzene in [Bmim][BF4] and [Bmim][PF6] Ionic Liquids

2013 ◽  
Vol 864-867 ◽  
pp. 125-130 ◽  
Author(s):  
Bin Guo ◽  
Yu Song ◽  
Wei Zhao Liang ◽  
Dan Dan Zhang ◽  
Wei Han ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Binary Mixtures ◽  
Mole Fraction ◽  
Binary Systems ◽  
Liquid Mixtures ◽  
Temperature Range

To well know the properties of ionic liquid mixtures, the viscosity of the binary mixtures containing the methylbenzene and imidazole ionic liquids (1-butyl-3-methylimidazolium tetrafluoroborate [Bmim][BF4] or 1-butyl-3-methylimidazolium hexafluorophosphate [Bmim][PF6]) were measured. Within the temperature range from 298.15 K to 308.15 K, the viscosity of the four binary systems decreased sharply as the increase of temperature. The viscosity decreased slowly in the temperature range from 308.15 K to 338.15 K. The viscosity also decreased with decreasing of the mole fraction of ionic liquid. The viscosity of methylbenzene in the imidazole ionic liquids was in sequence: [Bmim][BF4] < [Bmim][PF6]. The experimental viscosity values had been correlated using the binary parameters of Vogel-Fulcher-Tamman equation.

scholarly journals Solvatochromic parameters for binary mixtures of an ionic liquid with various protic molecular solvents

2008 ◽  
Vol 140 (3) ◽  
pp. 329-334 ◽  
Author(s):  
Mohammad Khodadadi-Moghaddam ◽  
Aziz Habibi-Yangjeh ◽  
Mohamad Reza Gholami
Keyword(s):  
Ionic Liquid ◽  
Binary Mixtures ◽  
Solvatochromic Parameters ◽  
Molecular Solvents

Solvation properties of protic ionic liquid–molecular solvent mixtures

2020 ◽  
Vol 22 (19) ◽  
pp. 10995-11011 ◽  
Author(s):  
Dilek Yalcin ◽  
Andrew J. Christofferson ◽  
Calum J. Drummond ◽  
Tamar L. Greaves
Keyword(s):  
Ionic Liquid ◽  
Binary Mixtures ◽  
Binary Solvent ◽  
Solvent Mixtures ◽  
Protic Ionic Liquid ◽  
Ethylammonium Nitrate ◽  
Binary Solvent Systems ◽  
Solvent Systems ◽  
Molecular Solvents

In this study, we have investigated the solvation properties of binary mixtures of PILs with molecular solvents. The selected binary solvent systems are the PILs ethylammonium nitrate (EAN) and propylammonium nitrate (PAN) combined with either water, methanol, acetonitrile or DMSO.

scholarly journals Correlation and prediction of the physical and excess properties of the ionic liquid 1-butyl-3-methylimidazolium methyl sulphate with several alcohols at T= (298.15 to 313.15) K

2013 ◽  
Author(s):  
◽  
Sangeeta Singh
Keyword(s):  
Refractive Index ◽  
Ionic Liquid ◽  
Binary Mixtures ◽  
Binary Systems ◽  
Excess Molar Volumes ◽  
Partial Molar Volumes ◽  
Excess Properties ◽  
Excess Isentropic Compressibilities ◽  
Molar Volumes ◽  
Isentropic Compressibilities

The thermodynamic properties of binary liquid mixtures using an ionic liquid (IL) with alcohols were determined at different temperatures. The ionic liquid used was 1-butyl-3- methylimidazolium methylsulphate [BMIM]+[MeSO4]-. Densities, speed of sound, and refractive indices for the binary mixtures ([BMIM]+[MeSO4]- + methanol, or 1-propanol, or 2-propanol, or 1-butanol) were experimentally measured over the whole range of composition at T = (298.15, E 303.15, 308.15, and 313.15) K. From the experimental data, excess molar volumes, V m , E , deviations in refractive isentropic compressibilities, κ s , excess isentropic compressibilities, κ S indices, ∆n, and molar refractions, R, were calculated. The excess partial molar volumes were also calculated at T = 298.15 K. For the binary systems, ([BMIM]+[MeSO4]- + methanol, or 1-propanol, or 2-propanol, or E E E 1-butanol) V m and κ S are always negative and V m decrease slightly when the temperature increases. The refractive index deviation at T = (298.15, 303.15, 308.15, and 313.15) K is positive over the whole composition range. The measured negative values for excess molar volume of these mixtures ([BMIM]+[MeSO4]- + methanol, or 1-propanol, or 2-propanol, or 1-butanol) indicate strong ion-dipole interactions and packing between alcohols and IL are present. The Redlich-Kister smoothing polynomial equation was satisfactorily applied for the E E fitting of the V m , κ S , and ∆n data to give the fitting parameters and the root-mean-square deviations. The Lorentz-Lorenz (L-L) equation was also used to correlate the volumetric property and predict the density or refractive index of the binary mixtures of ionic liquid and the organic solvents. The Lorentz-Lorenz approximation gives a higher σ when used to correlate the iiiexcess molar volumes for the mixtures ([BMIM]+[MeSO4]- + methanol, or 1-propanol, or 2-propanol, or 1-butanol). The L-L equation gives good results for the prediction of density and refractive index. The results are discussed in terms of solute-solute, solute-solvent and solvent- solvent interactions.

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