1-Butyl-4-methylpyridinium iodide, CAS: 32353-64-3

Key Applications:

Electrochemical Systems

• Serves as a supporting electrolyte in non‑aqueous electrochemical studies where high ionic strength and wide electrochemical windows are required.
• Used in redox‑active systems to stabilize charged intermediates and improve conductivity in organic media.
• Investigated in electrodeposition research, particularly where halide coordination influences metal nucleation behavior.

Catalysis and Organic Synthesis

• Functions as a phase‑transfer‑active ionic medium for halide‑driven transformations, including nucleophilic substitution and alkylation reactions.
• Employed as a tunable ionic additive to influence reaction selectivity, solvation environment, and reagent dispersion in homogeneous catalysis.
• Useful in mechanistic studies examining how pyridinium cations modulate halide availability and reaction kinetics.

Materials Science and Thin‑Film Research

• Incorporated into precursor formulations for halide‑containing thin films, where the iodide counterion can influence crystallization pathways.
• Explored as a structure‑directing ionic component in polymer–ionic liquid composites, improving ion transport and mechanical stability.
• Utilized in studies of ionic liquid–modified surfaces to adjust wettability, charge distribution, and interfacial behavior.

Solvent Extraction and Separation Processes

• Acts as an iodide‑rich ionic phase for selective extraction of metal ions that form stable iodide complexes.
• Supports biphasic separation systems where hydrophobic cation/halide combinations enhance partitioning efficiency.
• Applied in analytical extraction workflows requiring controlled halide activity.

Spectroscopy and Analytical Chemistry

• Used as a calibration or matrix component in spectroscopic studies probing ion pairing, solvation, and halide–cation interactions.
• Serves as a reference ionic liquid for comparative studies across positional isomers (e.g., 2‑methyl, 3‑methyl, 4‑methyl pyridinium salts).
• Supports NMR and IR investigations into cation–anion structuring and hydrogen‑bonding environments.

Research and Development

• Suitable for formulation screening in ionic liquid design, enabling structure–property comparisons across pyridinium families.
• Used in fundamental studies of halide‑dependent reactivity, ion mobility, and thermal behavior.
• Supports development of custom electrolytes, catalytic media, and separation systems where iodide activity is a key variable.

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