1-Ethylpyridinium tetrafluoroborate, CAS: 350-48-1

Key Applications:

Electrochemical Systems

• Electrolyte component in supercapacitors and electrochemical double‑layer capacitors (EDLCs), where its ionic mobility and wide liquid‑phase range enhance charge–discharge stability.
• Supporting electrolyte for electrodeposition of metals (e.g., Cu, Ni, Ag) under water‑sensitive or morphology‑controlled conditions.
• Medium for redox‑active species, improving solubility and diffusion in electrochemical sensors and analytical devices.

Catalysis & Organic Synthesis

• Reaction medium for acid‑catalyzed, transition‑metal‑catalyzed, and biphasic transformations requiring low volatility and thermal stability.
• Solvent for nucleophilic substitution, alkylation, and cyclization reactions, enabling improved yields and simplified product isolation.
• Stabilizing environment for homogeneous catalysts, particularly in systems where BF₄⁻ supports weakly coordinating conditions.

Materials Science & Nanostructures

• Template and stabilizing medium for nanoparticle synthesis (e.g., Au, Pt, metal oxides), enabling controlled particle size and dispersion.
• Processing aid in polymer electrolytes and ion‑conducting films, improving ionic transport and mechanical stability.
• Additive in sol–gel and thin‑film fabrication, where its ionic character influences porosity and microstructure.

Separation Science

• Extractant or co‑solvent in liquid–liquid extraction of aromatic hydrocarbons, metal ions, and polar organics.
• Stationary‑phase modifier in chromatography, enhancing selectivity for polar and aromatic analytes.
• Medium for CO₂ and SO₂ capture studies, leveraging pyridinium cation interactions with acidic gases.

Thermal & Green Chemistry Applications

• Heat‑transfer and thermal‑storage fluid in moderate‑temperature systems due to its low vapor pressure and thermal robustness.
• Replacement for volatile organic solvents in sustainable processing, reducing emissions and improving operator safety.

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