1-Butyl-3-ethylimidazolium hexafluorophosphate, CAS: 256647-89-9

Key Applications:

Solvent and Solubility‑Driven Applications

• Functions as a hydrophobic ionic liquid with strong solvating power for a wide range of organic molecules, enabling use as a replacement for volatile organic solvents in synthesis and separations.
• Supports biphasic reaction systems due to its immiscibility with water, improving catalyst recovery and product isolation.
• Enhances solubility of gases and nonpolar substrates, making it suitable for gas–liquid reaction media and specialty extraction workflows.

CO₂ Capture and Gas Solubility

• Exhibits high CO₂ solubility relative to conventional solvents, enabling use in physical CO₂ absorption processes and gas separation studies.
• Serves as a tunable medium for evaluating structure–property relationships in ionic‑liquid‑based carbon capture systems.
• Supports development of hybrid capture materials (e.g., IL‑polymer composites, supported IL membranes) where PF6‑based ionic liquids improve gas permeability and selectivity.

Catalysis and Reaction Media

• Provides a stable, non‑volatile medium for transition‑metal catalysis, including hydrogenation, alkylation, and coupling reactions.
• Facilitates catalyst recycling and phase‑separated reaction engineering due to its hydrophobicity and thermal stability.

Electrochemical and Materials Applications

• Used as a component in electrolytes for supercapacitors and electrochemical devices where low volatility and wide electrochemical windows are required.
• Supports nanoparticle synthesis and surface modification by stabilizing charged intermediates and controlling nucleation environments.

Extraction and Separation

• Enables selective extraction of aromatic compounds, metal ions, and hydrophobic organics due to its tunable polarity and phase behavior.
• Useful in liquid–liquid extraction systems where water immiscibility and high thermal stability are advantageous.

Thermal and Process Applications

• Functions as a heat‑transfer or thermal‑storage medium in niche applications requiring chemical stability and low vapor pressure.
• Suitable for high‑temperature reaction environments where conventional organic solvents degrade.

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