1-Butyl-2-methylpyridinium bromide, CAS: 26576-84-1

Key Applications:

Electrochemistry and Energy Systems

• Used as an ionic liquid precursor or supporting electrolyte in electrochemical cells requiring wide electrochemical windows.
• Enhances ion transport in redox systems, particularly where bromide counterions support halide‑mediated charge transfer.
• Suitable for electrodeposition studies involving metals sensitive to coordinating solvents.

Catalysis and Organic Synthesis

• Functions as a phase‑transfer catalyst in biphasic reactions, improving mass transfer and reaction rates.
• Serves as a solvent or co‑solvent for transition‑metal catalysis, especially in systems requiring low‑volatility, thermally stable media.
• Useful in nucleophilic substitution and halide‑exchange reactions where bromide availability is advantageous.

Solvent Extraction and Separation Science

• Applied in liquid–liquid extraction of metal ions, leveraging pyridinium cation–metal interactions.
• Supports selective extraction of lanthanides, actinides, and transition metals in hydrometallurgical workflows.
• Employed in ion‑pair chromatography as a mobile‑phase additive to modulate retention and peak shape.

Materials Science and Polymer Processing

• Acts as a structure‑directing agent in the synthesis of porous materials, including zeolites and metal–organic frameworks.
• Used as a plasticizing or conductivity‑enhancing additive in polymer electrolytes and ion‑conducting films.
• Facilitates dispersion of nanomaterials such as carbon nanotubes and metal oxides.

Spectroscopy and Analytical Chemistry

• Serves as a stabilizing medium for spectroscopic studies requiring low vapor pressure and controlled polarity.
• Utilized in NMR and UV‑Vis experiments to probe ion pairing, solvation, and halide exchange mechanisms.
• Supports electroanalytical methods where bromide ions participate in redox cycling.

Thermal and Chemical Process Applications

• Suitable for high‑temperature reaction media due to its low volatility and thermal robustness.
• Applied in halide‑mediated transformations where controlled bromide activity is required.
• Used in formulation studies for ionic‑liquid‑based heat‑transfer or thermal‑storage systems.

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