Association of Ionic Liquids in Solution: Conductivity Studies of [BMIM][Cl] and [BMIM][PF6] in Binary Mixtures of Acetonitrile + Methanol

Association of Ionic Liquids in Solution: Conductivity Studies of [BMIM][Cl] and [BMIM][PF6] in Binary Mixtures of Acetonitrile + Methanol

The concentration dependence of molar conductance for 1-butyl-3-methylimidazolium chloride and 1-butyl-3-methylimidazolium hexafluorophosphate in binary mixtures of acetonitrile + methanol was investigated to explore the ion association behavior of imidazolium based ionic liquids. The limiting molar...

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Veröffentlicht in:Journal of solution chemistry 2013-05, Vol.42 (4), p.738-745
Hauptverfasser: Jan, Roohi, Rather, Ghulam Mohammad, Bhat, Mohsin Ahmad
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Acetonitrile
Binary mixtures
Conductance
Ion association
Ionic liquids
Mathematical models
Methyl alcohol
Solvents
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creator Jan, Roohi
Rather, Ghulam Mohammad
Bhat, Mohsin Ahmad
description The concentration dependence of molar conductance for 1-butyl-3-methylimidazolium chloride and 1-butyl-3-methylimidazolium hexafluorophosphate in binary mixtures of acetonitrile + methanol was investigated to explore the ion association behavior of imidazolium based ionic liquids. The limiting molar conductance $(\Uplambda_{m}0})$ ( ? m 0 ) , association constants (K a 0 ) and the maximal distance between the oppositely charged ions in ion pairs (R ij ) in the mixed solvent mixtures were evaluated following the framework of Barthelas low-concentration chemical model. The investigated ILs display opposing trends in ion association behavior with change in solvent composition of acetonitrile + methanol binary mixtures. The results are discussed in light of ionic liquid and solvent specific ion?solvent and ion?ion interactions in the mixed solvent systems.
doi_str_mv 10.1007/s10953-013-9999-4
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subjects Acetonitrile
Binary mixtures
Conductance
Ion association
Ionic liquids
Mathematical models
Methyl alcohol
Solvents
title Association of Ionic Liquids in Solution: Conductivity Studies of [BMIM][Cl] and [BMIM][PF6] in Binary Mixtures of Acetonitrile + Methanol
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