1-Propylpyridinium iodide, CAS: 39868-02-5

Key Applications:

1. Organic Synthesis and Catalysis

• Functions as a quaternary ammonium salt for phase‑transfer catalysis in halide exchange, alkylation, and nucleophilic substitution reactions.
• Useful as a precursor or counterion in the preparation of pyridinium‑based ionic liquids and functional salts.
• Supports iodide‑mediated transformations where a stable, non‑volatile iodide source is required.

2. Materials Science and Thin‑Film Research

• Serves as an iodide‑rich additive for tuning crystallization behavior in hybrid organic–inorganic materials.
• Employed in exploratory work on charge‑transport modifiers and interfacial layers due to its ionic conductivity and thermal stability.
• Investigated as a structure‑directing agent in templated polymer and composite material formation.

3. Electrochemical and Ion‑Transport Studies

• Provides a well‑defined iodide electrolyte for redox kinetics, ion mobility, and conductivity measurements.
• Suitable for evaluating iodide/tri‑iodide redox couples in prototype electrochemical systems.
• Used in benchmarking studies comparing pyridinium‑based salts with imidazolium, pyrrolidinium, and piperidinium analogues.

4. Photochemical and Redox Chemistry

• Acts as a controlled iodide donor in photochemical cleavage, radical initiation, and electron‑transfer studies.
• Supports mechanistic investigations where iodide concentration and cation identity influence reaction pathways.

5. Reference Salt for Structure–Property Mapping

• Useful in systematic studies examining how alkyl‑chain length on pyridinium cations affects melting point, solubility, viscosity, and ion‑pairing behavior.
• Supports computational and experimental datasets for modeling ionic interactions and lattice energetics.

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