Halogen free 1,2,3- and 1,2,4-triazolide based ionic liquids: synthesis and properties

Area of Science:

• Materials Science
• Organic Chemistry
• Electrochemistry

Background:

• Ionic liquids (ILs) are salts that are liquid at low temperatures.
• Traditional ILs often contain less desirable anions or cations.
• Triazoles offer a versatile platform for designing novel ionic liquid components.

Purpose of the Study:

• To synthesize and characterize novel fully organic ionic liquids (ILs) utilizing triazole derivatives.
• To investigate the physicochemical properties of these new ILs, including thermal and electrochemical stability.
• To compare the performance of these triazole-based ILs with existing ionic liquids.

Main Methods:

• Synthesis of 1,2,3- and 1,2,4-triazolide anions.
• Synthesis of 1,2,4-triazolium and imidazolium cations.
• Characterization of ILs including glass transition temperature, density, and viscosity measurements.
• Assessment of electrochemical and thermal stability.
• Evaluation of ionic conductivity.

Main Results:

• Successfully created fully organic ionic liquids with triazolide anions and triazolium/imidazolium cations.
• Determined key properties: glass transition temperatures, densities, and viscosities.
• Observed significantly higher electrochemical and thermal stability compared to conventional ILs.
• Demonstrated superior ionic conductivity in the newly synthesized triazole-based ILs.

Conclusions:

• Triazole-based ionic liquids represent a promising class of "fully organic" ILs.
• These novel ILs offer enhanced stability and conductivity, outperforming many existing ILs.
• The findings suggest potential applications for these triazole ILs in various fields requiring high-performance electrolytes.