1-Ethyl-3-methylpyridinium bis(trifluoromethylsulfonyl)imide, CAS: 841251-37-4

Key Applications:

Electrochemical Systems

• Serves as a high‑stability ionic liquid electrolyte for lithium, sodium, and multivalent metal batteries.
• Provides wide electrochemical windows and low volatility, supporting high‑voltage cell designs.
• Used as a conductive medium in supercapacitors, enabling improved ionic mobility and thermal resilience.
• Functions as a stable solvent/electrolyte for electrodeposition of metals and alloys under moisture‑sensitive or high‑temperature conditions.

Catalysis and Organic Synthesis

• Acts as a non‑volatile, thermally robust reaction medium for transition‑metal‑catalyzed transformations.
• Supports acid‑sensitive and base‑sensitive reactions due to its weakly coordinating TFSI anion.
• Enables biphasic catalysis and catalyst recycling workflows.
• Useful for selective alkylation, nucleophilic substitution, and oxidative coupling reactions requiring controlled ionic environments.

Separation Science and Extraction

• Employed in liquid–liquid extraction of metal ions, particularly rare‑earth and actinide species, due to its hydrophobicity and tunable coordination behavior.
• Used in chromatographic method development as an ionic liquid additive to improve peak shape and separation efficiency.
• Supports gas absorption studies, including CO₂ solubility and transport behavior in fluorinated ionic liquids.

Materials Science and Polymer Engineering

• Incorporated into polymer matrices to enhance ionic conductivity, flexibility, and thermal stability.
• Used in ionogel formation for flexible electronics, sensors, and solid‑state electrochemical devices.
• Serves as a plasticizer or mobility‑enhancing additive in high‑performance polymer electrolytes.

Surface Science and Coatings

• Provides controlled interfacial behavior for electrode modification, corrosion studies, and surface passivation research.
• Used as a medium for forming uniform, defect‑minimized thin films via electrochemical or solution‑based deposition.
• Supports lubrication studies where low vapor pressure and high thermal stability are required.

Spectroscopy and Fundamental Research

• Employed as a reference ionic liquid for benchmarking transport properties (viscosity, conductivity, diffusion).
• Used in vibrational, NMR, and dielectric spectroscopy to study ion pairing, solvation, and dynamic relaxation processes.
• Supports computational and experimental investigations of structure–property relationships in pyridinium‑based ionic liquids.

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