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Related Experiment Video

Updated: May 12, 2026

Synthesis of Ionic Liquid Based Electrolytes, Assembly of Li-ion Batteries, and Measurements of Performance at High Temperature

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Published on: December 20, 2016

Probing ionic liquid aqueous solutions using temperature of maximum density isotope effects.

Mohammad Tariq¹, José M S S Esperança, Luís P N Rebelo

¹Instituto de Tecnologia Química e Biológica (www.itqb.unl.pt), Universidade Nova de Lisboa, Av. da República, Oeiras 2780-157, Portugal. tariq@itqb.unl.pt

Molecules (Basel, Switzerland)

|March 27, 2013

Summary

Ionic liquids alter water's maximum density temperature. Researchers studied three ionic liquids with a common cation and different anions in normal and deuterated water to understand anion-water interactions.

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Published on: September 7, 2011

Area of Science:

Physical Chemistry
Solution Chemistry
Ionic Liquids

Background:

Ionic liquids are tunable solvents with unique properties.
Understanding their effect on water structure is crucial.
The temperature of maximum density (TMD) is sensitive to solution composition.

Purpose of the Study:

To investigate the impact of different ionic liquid anions on the TMD of aqueous solutions.
To compare the effects of acetate, ethylsulfate, and tetracyanoborate anions.
To explore these effects in both normal and deuterated water.

Main Methods:

Preparation and characterization of aqueous solutions containing specific ionic liquids.
Precise measurement of the temperature of maximum density (TMD) for each solution.
Comparative analysis of TMD shifts based on anion type and water isotopologue.

Main Results:

Observed significant shifts in TMD due to the presence of ionic liquid solutes.
Differences in TMD shifts were noted among the three ionic liquids studied.
The nature of the anion-water interactions appears to influence the observed shifts.

Conclusions:

The study provides novel insights into how ionic liquid anions interact with water molecules.
Anion structure and its interaction with water are key factors in modifying solution properties like TMD.
This research contributes to the fundamental understanding of ionic liquid-water systems.