1-Methyl-3-propylimidazolium tetrafluoroborate, CAS: 244193-48-4

Key Applications:

Solvent and Electrolyte Functions

• Serves as a low‑volatility, thermally stable solvent for organic synthesis, particularly in substitution, cyclization, and transition‑metal‑catalyzed reactions.
• Functions as an electrolyte component in electrochemical systems requiring moderate viscosity and stable ionic conductivity.
• Supports electrodeposition studies where BF₄⁻ anions promote smooth metal film formation and minimize passivation.

Catalysis and Reaction Media

• Provides a tunable, non‑aqueous medium for acid‑catalyzed transformations, including esterifications and alkylations.
• Enhances selectivity in biphasic and phase‑transfer systems due to its balanced polarity and miscibility profile.
• Useful in microwave‑assisted synthesis, where ionic liquids accelerate heating and improve reaction efficiency.

Separation and Extraction

• Employed in liquid–liquid extraction of aromatic hydrocarbons, phenolics, and metal ions, leveraging BF₄⁻’s relatively weak coordinating behavior.
• Supports chromatographic method development as an additive or stationary‑phase modifier to improve peak shape and analyte retention control.

Materials and Polymer Science

• Acts as a plasticizing and conductivity‑enhancing additive in polymer electrolytes, ion gels, and composite membranes.
• Used in templating and dispersion of nanoparticles, where the imidazolium cation stabilizes metal or metal‑oxide surfaces.
• Facilitates the preparation of hybrid materials requiring ionic domains for charge transport or structural tuning.

Spectroscopy and Analytical Chemistry

• Provides a stable, low‑volatility matrix for spectroscopic studies of solvation, ion pairing, and reaction intermediates.
• Serves as a calibration or reference medium in electroanalytical experiments due to its predictable ionic mobility.

Energy and Environmental Applications

• Investigated as a component in redox‑flow and dye‑sensitized solar cell electrolytes where BF₄⁻ offers oxidative stability.
• Supports CO₂ capture and gas‑solubility studies, particularly in systems evaluating cation structure–property relationships.

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