1-Heptyl-3-methylimidazolium tetrafluoroborate, CAS: 244193-51-9

Key Applications:

Electrochemical and Energy‑Related Uses

• Electrolyte component in supercapacitors and electrochemical cells

The long heptyl chain improves viscosity–conductivity balance, while the BF₄⁻ anion supports wide electrochemical windows.

• Medium for electrodeposition of metals and alloys

Useful for smoother, more uniform films compared to aqueous systems.

• Solvent for redox‑active species in fundamental electrochemical studies.

Catalysis and Synthesis

• Reaction medium for acid‑catalyzed and transition‑metal‑catalyzed transformations

The ionic environment can enhance selectivity and stabilize reactive intermediates.

• Phase‑transfer–like behavior in biphasic systems

The heptyl chain increases organic compatibility, enabling improved mass transfer.

• Support for immobilized catalysts

Forms stable ionic‑liquid films on solid supports.

Extraction and Separation

• Liquid–liquid extraction of aromatic hydrocarbons, dyes, and metal ions

Hydrophobicity aids partitioning of nonpolar or moderately polar solutes.

• CO₂ and SO₂ absorption studies

BF₄⁻ systems are often used as benchmarks for gas‑solubility comparisons.

• Selective extraction of rare‑earth or transition‑metal ions when paired with coordinating ligands.

Materials and Surface Science

• Template or structuring agent in nanoparticle synthesis

Controls particle size and dispersion due to strong ionic microenvironments.

• Additive in polymer electrolytes or ion‑conducting films

Enhances ionic mobility and thermal stability.

• Surface modification medium for creating IL‑coated electrodes or membranes.

Spectroscopy and Fundamental Studies

• Solvent for NMR, IR, and Raman investigations of solvation dynamics

The heptyl chain provides tunable polarity and microheterogeneity.

• Model system for studying cation–anion interactions and nanostructuring in ionic liquids.

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