Thermodynamics and Accurate Solubilities of Lithium and Sodium Salts in Imidazolium-Based Ionic Liquids
- 1Laboratoire de Chimie de l’ENS de Lyon, 46 allée d’Italie 69364, Lyon CEDEX, France
Abstract
Determining the solubility of metal salts in ionic liquids is challenging using visual methods or Differential Scanning Calorimetry (DSC). The slow crystallization kinetics of the metal salts impede accurate Solid-Liquid Equilibrium (SLE) measurements, resulting in significant discrepancies in the limited available literature. We propose Isothermal Titration Calorimetry (ITC) as an alternative technique to measure the solubility of metal salts in ionic liquids at different temperatures. Some new solubility data of lithium and sodium salts in imidazolium ionic liquid were determined. We show how the ITC experiments not only provide accurate solubility data at the studied temperatures but also reveal key thermodynamic properties of dissolution, including the enthalpy of dissolution; the mixing enthalpy and the partial molar excess enthalpy of both components at saturation.
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BibTeX
@misc{depraetere2026thermodynamics,
title = {{Thermodynamics and Accurate Solubilities of Lithium and Sodium Salts in Imidazolium-Based Ionic Liquids}},
author = {Guillaume Depraetère and Nithavong Cam and Agílio Pádua and Margarida Costa Gomes},
howpublished = {ChemRxiv},
year = {2026},
month = sep,
doi = {10.26434/chemrxiv.15009614/v1},
url = {https://chemrxiv.org/doi/full/10.26434/chemrxiv.15009614/v1},
note = {CC BY},
}
RIS
TY - UNPB
TI - Thermodynamics and Accurate Solubilities of Lithium and Sodium Salts in Imidazolium-Based Ionic Liquids
AU - Guillaume Depraetère
AU - Nithavong Cam
AU - Agílio Pádua
AU - Margarida Costa Gomes
PY - 2026
DA - 2026/09/29
PB - ChemRxiv
DO - 10.26434/chemrxiv.15009614/v1
UR - https://chemrxiv.org/doi/full/10.26434/chemrxiv.15009614/v1
AB - Determining the solubility of metal salts in ionic liquids is challenging using visual methods or Differential Scanning Calorimetry (DSC). The slow crystallization kinetics of the metal salts impede accurate Solid-Liquid Equilibrium (SLE) measurements, resulting in significant discrepancies in the limited available literature. We propose Isothermal Titration Calorimetry (ITC) as an alternative technique to measure the solubility of metal salts in ionic liquids at different temperatures. Some new solubility data of lithium and sodium salts in imidazolium ionic liquid were determined. We show how the ITC experiments not only provide accurate solubility data at the studied temperatures but also reveal key thermodynamic properties of dissolution, including the enthalpy of dissolution; the mixing enthalpy and the partial molar excess enthalpy of both components at saturation.
ER -