1-Butyl-2-methylpyridinium bis(trifluoromethylsulfonyl)imide, CAS: 384347-09-5

Key Applications:

Electrochemical Systems

• High‑stability electrolyte component for lithium‑ion, sodium‑ion, and multivalent batteries, leveraging the TFSI⁻ anion’s wide electrochemical window.
• Ionic liquid medium for supercapacitors requiring low viscosity and enhanced ion mobility.
• Solvent/electrolyte for electrodeposition of reactive metals (e.g., Al, Mg) under moisture‑sensitive conditions.
• Conductive phase in redox‑flow and hybrid flow batteries where thermal and chemical stability are critical.

Catalysis & Organic Synthesis

• Non‑volatile, thermally robust solvent for transition‑metal‑catalyzed reactions, including cross‑couplings and hydrogenations.
• Reaction medium for Friedel–Crafts, alkylation, and acylation processes requiring strong ion‑pairing environments.
• Recyclable ionic liquid phase for biphasic catalysis and supported ionic liquid catalysts (SILCs).
• Stabilizing medium for carbocationic and electrophilic transformations due to the pyridinium cation’s tunable polarity.

Separation Science & Extraction

• Selective extraction medium for aromatics, sulfur species, and metal ions, benefiting from strong solvation of polarizable species.
• Component in supported ionic liquid membranes (SILMs) for gas separations such as CO₂/N₂ and CO₂/CH₄.
• Solvent for liquid–liquid extraction in refinery, petrochemical, and pharmaceutical workflows.

Materials Processing & Surface Engineering

• Additive in lubricants and high‑temperature greases, improving thermal stability and anti‑wear performance.
• Ionic liquid phase for nanoparticle synthesis, enabling controlled nucleation and growth of metals and metal oxides.
• Medium for polymerization reactions, including controlled radical polymerizations and ion‑conductive polymer composites.

Thermal & Chemical Stability Applications

• Heat‑transfer and thermal‑storage fluid for high‑temperature industrial processes.
• Non‑flammable solvent for hazard‑sensitive environments requiring low vapor pressure and high decomposition temperatures.
• Component in electrolyte formulations for devices operating across wide temperature ranges.

Analytical & Laboratory Uses

• Calibration and benchmarking solvent for viscosity, conductivity, and ion‑transport studies.
• Matrix or medium for spectroscopic and electroanalytical measurements where water‑free conditions are essential.

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