1-Ethyl-2,3-dimethylimidazolium bromide, CAS: 98892-76-3

Key Applications:

 Catalysis & Organic Synthesis

• Functions as a polar, non‑volatile reaction medium for nucleophilic substitutions, oxidations, reductions, and C–C bond‑forming reactions.
• Bromide anion supports phase‑transfer catalysis, enhancing rates in biphasic organic–aqueous systems.
• Useful for transition‑metal‑catalyzed transformations, where steric hindrance around the imidazolium ring improves catalyst stability.

Electrochemical Systems

• Serves as a supporting electrolyte in electrochemical studies requiring high ionic conductivity and wide liquid‑phase stability.
• Employed in redox‑active systems, electrodeposition, and electroanalytical experiments where halide coordination is advantageous.
• The 2,3‑dimethyl substitution pattern reduces ring acidity, improving electrochemical stability windows relative to unsubstituted imidazoliums.

Biomolecular & Materials Solvation

• Effective solvent or co‑solvent for proteins, peptides, and nucleic acids, enabling controlled denaturation, refolding, or stabilization studies.
• Supports polymer dissolution and processing, particularly for charged or hydrogen‑bond‑rich polymers.
• Useful in nanomaterials synthesis, including templated growth of metal nanoparticles and ionic‑liquid‑mediated self‑assembly.

Thermal & Process Engineering

• High thermal stability and negligible vapor pressure make it suitable for high‑temperature reaction media and heat‑transfer environments.
• Acts as a green solvent alternative in processes seeking to reduce VOC emissions.

Surfactant, Micelle, and Soft‑Matter Systems

• Bromide counterion enables formation of ionic‑liquid‑based micelles, microemulsions, and structured fluids.
• Useful in colloid stabilization, nanoparticle dispersion, and interfacial engineering.

Precursor for Ionic‑Liquid Derivatives

• Serves as a synthetic intermediate for preparing hydrophobic or task‑specific ionic liquids via anion exchange (e.g., TFSI⁻, PF₆⁻, FSI⁻).
• Valuable for tuning viscosity, polarity, and hydrophobicity in custom IL formulations.

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