1-Methyl-3-octadecylimidazolium hexafluorophosphate, CAS: 219947-96-3

Key Applications:

Amphiphilic Ionic Liquid for Self‑Assembly & Nanostructuring

• Forms ordered micelles, vesicles, and lamellar phases due to its long C18 tail.
• Used to template nanoparticles, mesoporous materials, and thin films in aqueous and non‑aqueous systems.
• Enables controlled domain formation in soft‑matter and polymer systems.

Surfactant & Interfacial Modifier

• Acts as a cationic surfactant with tunable charge density and hydrophobicity.
• Improves wetting, dispersion, and interfacial adhesion in emulsions, coatings, and colloidal systems.
• Useful in stabilizing water‑in‑oil emulsions and ionic‑liquid‑in‑oil microemulsions.

Phase‑Transfer & Extraction Agent

• Highly hydrophobic PF₆⁻ ionic liquid phase supports liquid–liquid extraction of metals, dyes, and hydrophobic organics.
• Enhances selective partitioning in biphasic catalytic systems.
• Suitable for ion‑pair extraction of bulky anions and aromatic species.

Hydrophobic Ionic Liquid Medium for Catalysis

• Provides a non‑volatile, thermally stable reaction medium for acid‑catalyzed and metal‑catalyzed transformations.
• Supports biphasic catalysis where product separation is driven by hydrophobic IL partitioning.
• Useful in Friedel–Crafts, alkylation, and oxidation reactions requiring low‑polarity environments.

Additive in Polymer, Coating & Lubrication Systems

• Long alkyl chain improves compatibilization between polar and non‑polar polymer domains.
• Enhances film formation, anti‑static behavior, and surface smoothness in coatings.
• Acts as a boundary‑lubrication additive, reducing friction in hydrophobic matrices.

Structured Electrolyte Component (Specialty Use)

• While PF₆⁻ salts with long alkyl chains are not typical high‑conductivity electrolytes, they are used in:
  • Gel polymer electrolytes where amphiphilic structuring is desired.
  • Interfacial‑engineering layers in electrochemical devices.
  • Ion‑transport modifiers in mixed‑IL systems.

Biological & Colloidal Systems Research

• Serves as a model cationic amphiphile for studying membrane interactions.
• Used in protein and enzyme stabilization in hydrophobic IL phases.
• Supports controlled aggregation of nanoparticles and biomolecules.

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