1-Methylimidazolium bromide, CAS: 101023-58-9

Key Application:

 1. Precursor for Tailored Ionic Liquid Synthesis

• Serves as a key quaternization intermediate for producing a wide range of 1‑alkyl‑3‑methylimidazolium ionic liquids via N‑alkylation.
• Enables modular synthesis of ILs with tunable hydrophobicity, viscosity, conductivity, and thermal stability.
• Commonly used in research settings to generate chloride, tetrafluoroborate, PF₆⁻, NTf₂⁻, FSI⁻, and other anion‑exchanged ILs.

 2. Building Block for Functional Organic Salts

• Acts as a versatile imidazolium cation source for preparing functional salts used in:
  • Organocatalysis
  • Phase‑transfer catalysis
  • Electrolyte additives
  • Polymeric ionic liquids (PILs)
• Supports synthesis of IL monomers for ion‑conducting polymer networks and membrane materials.

 3. Catalyst and Co‑Catalyst Component

• Used as a cationic scaffold in catalytic systems where imidazolium species stabilize reactive intermediates.
• Plays a role in:
  • Transition‑metal catalysis (e.g., Pd, Ru, Ni systems)
  • CO₂ activation studies
  • N‑heterocyclic carbene (NHC) precursor chemistry

 4. Solvent and Microenvironment Modifier

• Introduced in small quantities to tune polarity, ionic strength, or microviscosity in:
  • Organic synthesis
  • Supramolecular assembly
  • Biomolecular stabilization studies
• Useful in screening experiments where the imidazolium cation’s hydrogen‑bonding profile influences reaction outcomes.

 5. Electrochemical and Conductive Materials Research

• Serves as a precursor for ILs used in:
  • Electrolytes for batteries and supercapacitors
  • Electrodeposition baths
  • Ion‑transport membranes
• The bromide form is particularly useful for anion‑exchange reactions that yield high‑conductivity ionic liquids.

 6. Surfactant and Self‑Assembly Studies

• Imidazolium salts are widely used to probe:
  • Micelle formation
  • Interfacial charge effects
  • Nanostructured soft materials
• 1‑Methylimidazolium bromide provides a short‑chain, low‑hydrophobicity benchmark for comparative studies.

 7. Template and Structure‑Directing Agent

• Employed in the synthesis of:
  • Zeolites and mesoporous materials
  • Metal–organic frameworks (MOFs)
  • Nanoparticle assemblies
• The compact cation size allows fine control over pore geometry and crystallization pathways.

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