1-Hexyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide, CAS: 382150-50-7

Key Applications:

1. Electrochemical Systems

• Lithium‑ion and sodium‑ion battery electrolytes
  • Enhances ionic conductivity in mixed‑solvent systems
  • Improves SEI stability due to TFSI anion compatibility
  • Expands electrochemical window for high‑voltage cathodes
• Supercapacitors
  • High thermal stability supports elevated‑temperature operation
  • Hydrophobicity reduces moisture sensitivity
• Electrodeposition media
  • Enables smooth, uniform metal films (e.g., Al, rare‑earth metals)
  • Suitable for water‑sensitive or air‑sensitive metal systems

2. Catalysis and Organic Synthesis

• Non‑volatile reaction medium for transition‑metal catalysis
• Supports Friedel–Crafts, alkylation, and acylation reactions with improved selectivity
• Biphasic catalysis
  • IL phase retains catalyst; organic phase contains product
  • Simplifies separation and catalyst recycling
• Stabilizes reactive intermediates due to low nucleophilicity of TFSI⁻

3. Extraction and Separation Processes

• Liquid–liquid extraction of metal ions, including rare‑earth and actinide species
• Extraction of aromatic hydrocarbons via π–π interactions with the imidazolium ring
• CO₂ capture and gas separations, leveraging high CO₂ solubility in TFSI‑based ILs

4. Materials Science and Polymer Engineering

• Plasticizer for high‑performance polymers (PEO, PVDF, polyimides)
• Ion‑gel formation for flexible electronics, sensors, and soft actuators
• Template or structure‑directing agent for mesoporous silica, carbon materials, and MOFs

5. Thermal and Tribological Applications

• High‑temperature heat‑transfer fluids with negligible vapor pressure
• Lubricants and anti‑wear additives
  • Forms robust boundary layers on metal surfaces
  • Performs well under vacuum or inert atmospheres

6. Bioprocessing and Analytical Chemistry

• Stabilizes proteins and enzymes in non‑aqueous media
• Solvent for mass spectrometry sample preparation
• Stationary‑phase modifier in HPLC and GC

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