1-Ethyl-2-methylpyridinium bis(trifluoromethylsulfonyl)imide, CAS: 712354-99-9

Key Applications:

Electrochemical Systems

• High‑stability electrolyte component for lithium, sodium, and multivalent ion batteries where low viscosity and high ionic conductivity are required.
• Additive for high‑voltage electrolyte formulations, improving oxidative stability and suppressing parasitic reactions at electrode interfaces.
• Electrolyte medium for supercapacitors, particularly in devices requiring wide electrochemical windows and low volatility.
• Solvent or co‑solvent in electrodeposition baths, supporting uniform metal deposition and improved current efficiency.

Thermal & Chemical Stability Applications

• Heat‑transfer and thermal‑management fluids in systems requiring non‑flammability and high thermal stability.
• Reaction medium for high‑temperature or strongly electrophilic transformations, leveraging the TFSI anion’s exceptional chemical inertness.
• Solvent for catalytic processes, especially those involving transition‑metal complexes that benefit from weakly coordinating anions.

Separation Science & Extraction

• Phase‑transfer medium for metal ion extraction, including rare‑earth and precious‑metal separations.
• Selective solvent for hydrophobic analytes in liquid–liquid extraction workflows.
• Stationary‑phase modifier in chromatography, enhancing retention and selectivity for nonpolar or aromatic species.

Materials Science & Polymer Processing

• Plasticizer or processing aid for high‑performance polymers, improving flexibility and ionic mobility.
• Doping medium for conductive polymers such as PEDOT derivatives, enhancing conductivity and mechanical stability.
• Template or structuring solvent in the synthesis of porous materials, ionogels, and hybrid organic–inorganic matrices.

Surface & Interface Engineering

• Surface‑modification medium for tuning wettability, charge density, or interfacial adhesion on metals, oxides, and carbon materials.
• Electrochemical cleaning or passivation baths, benefiting from the ionic liquid’s low volatility and broad electrochemical window.

Analytical & Spectroscopic Uses

• Matrix or solvent for spectroscopic studies (NMR, IR, Raman) where low vapor pressure and high thermal stability are advantageous.
• Medium for studying ion–molecule interactions, proton transfer, and solvation dynamics due to its asymmetric pyridinium cation.

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