Tributylmethylphosphonium bis(trifluoromethylsulfonyl)imide, CAS: 324575-10-2

Key Applications:

1. Electrochemical Systems

• High‑temperature electrolytes for lithium, sodium, and multivalent metal batteries where wide electrochemical windows and thermal stability are required.
• Electrolyte additives to improve SEI formation, suppress dendrites, and enhance ionic conductivity in mixed‑solvent systems.
• Supercapacitor electrolytes, particularly in devices requiring low volatility and long‑term cycling stability.
• Electrode surface modifiers to tune interfacial behavior on carbon, metal, and metal‑oxide substrates.

2. Catalysis and Organic Synthesis

• Solvent and co‑solvent for transition‑metal catalysis, including cross‑coupling, hydrogenation, and carbon–carbon bond‑forming reactions.
• Medium for phase‑transfer catalysis, leveraging the phosphonium cation’s stability under strongly basic or nucleophilic conditions.
• Reaction media for high‑temperature or moisture‑sensitive transformations where conventional solvents degrade.

3. Materials Science and Polymer Engineering

• Plasticizer and processing aid for high‑performance polymers, including fluoropolymers and engineering plastics.
• Template or structuring agent in the formation of ion‑conductive membranes and polymer electrolytes.
• Dispersant for nanoparticles, carbon materials, and metal oxides in composite fabrication.

4. Separation Science

• Extractant for hydrophobic organics, leveraging the ionic liquid’s low miscibility with water and strong affinity for nonpolar species.
• Medium for liquid–liquid extraction of aromatic compounds, sulfur species, and other refinery‑relevant molecules.
• Support phase in supported ionic liquid membranes (SILMs) for gas separations involving CO₂, SO₂, and light hydrocarbons.

5. Thermal and Process Engineering

• Heat‑transfer fluid in specialized systems requiring non‑volatile, thermally stable media.
• Lubricant base fluid or additive for high‑temperature, low‑volatility lubrication environments.
• Antistatic and charge‑control agent in industrial processing where stable ionic conductivity is beneficial.

6. Analytical and Spectroscopic Applications

• Matrix and solvent for spectroscopic studies requiring low vapor pressure and broad thermal windows.
• Stabilizing medium for reactive intermediates or metal complexes during mechanistic investigations.

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