1-Butyl-3-methylpyridinium iodide, CAS: 258273-67-5

Key Applications:

Electrochemistry & Energy Storage

• Employed as a supporting electrolyte or ionic additive in redox‑active systems requiring high iodide availability.
• Used in dye‑sensitized solar cells (DSSCs) to enhance charge transport and stabilize I⁻/I₃⁻ redox couples.
• Investigated as a component in ionic‑liquid‑based electrolytes for batteries and capacitors where low volatility and wide electrochemical windows are required.

Catalysis & Organic Synthesis

• Functions as a phase‑transfer medium or reaction solvent in iodide‑driven transformations, including nucleophilic substitutions and halide exchange reactions.
• Serves as a recyclable ionic medium for metal‑catalyzed processes, enabling improved selectivity and simplified product separation.

Materials Science & Thin‑Film Processing

• Utilized in the preparation of conductive or ionically active polymer composites.
• Supports templating and self‑assembly processes where iodide counterions influence morphology or charge distribution.

Solvent Extraction & Separation Science

• Acts as an extractant or co‑solvent in halide‑assisted separations, particularly for metal ions with strong affinity for iodide.
• Applied in biphasic systems to tune polarity, viscosity, and partitioning behavior.

Spectroscopy & Analytical Chemistry

• Used as a medium for stabilizing iodide‑sensitive species in UV–Vis and electroanalytical studies.
• Enables controlled ionic strength and halide concentration in mechanistic investigations.

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