1-Butylpyridinium iodide, CAS: 874-81-7

Key Applications:

Electrochemistry and Charge‑Transfer Systems

• Functions as a supporting electrolyte in non‑aqueous electrochemical studies where a bulky, stable pyridinium cation is preferred.
• Useful in redox‑active systems requiring high ionic strength and low volatility.
• Supports ion‑transport investigations in mixed organic solvents and ionic‑liquid precursor matrices.

Precursor for Ionic Liquid and Salt Design

• Serves as a quaternary ammonium building block for synthesizing task‑specific ionic liquids via anion exchange.
• Enables formulation of halide‑rich ionic environments for catalysis, separations, and materials processing.

Phase‑Transfer and Halide‑Mediated Catalysis

• Acts as a phase‑transfer catalyst in organic transformations involving nucleophilic substitution, alkylation, and halide‑driven mechanisms.
• Provides controlled iodide delivery in reactions where iodide acts as a soft nucleophile or catalytic promoter.

Solvent Extraction and Ion‑Pairing Studies

• Supports extraction systems where iodide‑based ion pairing enhances selectivity for soft metal ions (e.g., Ag⁺, Pd²⁺).
• Useful in studying ion‑association equilibria in low‑polarity media.

Materials Science and Thin‑Film Processing

• Employed as an additive or templating agent in the preparation of hybrid organic–inorganic materials.
• Supports halide‑rich environments for perovskite precursor studies, crystallization behavior, and film morphology control.

Spectroscopy and Analytical Chemistry

• Provides a well‑defined pyridinium reference ion for NMR, FTIR, and conductivity studies.
• Useful in probing ion–solvent interactions and halide coordination behavior.

General Research Utility

• Suitable for halide‑exchange experiments, nucleophilicity comparisons, and benchmarking studies across pyridinium salt families.
• Offers a stable, high‑purity (>98%) iodide source for method development in synthetic and physical chemistry.

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