Diphenyliodonium Triflate, CAS: 66003-76-7

Key Applications:

1. Electrophilic Arene Functionalization

• Acts as a potent aryl‑transfer reagent, enabling O‑, N‑, S‑, and C‑arylation under mild conditions.
• Supports metal‑catalyzed and metal‑free pathways, making it attractive for green‑chemistry workflows.
• Frequently used to introduce phenyl groups into heterocycles, nucleophiles, and organometallic intermediates.

 2. Photoinitiators for Polymerization

• Serves as an efficient cationic photoinitiator in UV‑curable coatings, inks, adhesives, and photoresists.
• Generates strong Brønsted acids upon irradiation, initiating polymerization of epoxies, vinyl ethers, and oxetanes.
• Enables high‑resolution patterning in microelectronics and 3D printing resins.

 3. Oxidative and Radical Chemistry

• Functions as a mild oxidant and radical precursor in synthetic transformations.
• Supports oxidative coupling, rearrangements, and C–H activation strategies.
• Useful in mechanistic studies probing radical pathways and electron‑transfer processes.

 4. Cross‑Coupling and Metal‑Catalyzed Transformations

• Provides a stable, easy‑to‑handle aryl source for Pd‑, Cu‑, and Ni‑catalyzed reactions.
• Enables arylation of enolates, organoboron species, and heteroatom nucleophiles.
• Often chosen when traditional aryl halides are unreactive or incompatible with sensitive substrates.

 5. Materials Science & Surface Modification

• Used to graft phenyl groups onto surfaces, polymers, and nanomaterials.
• Supports the fabrication of functional coatings, dielectric materials, and optical components.
• Plays a role in developing advanced photoresists and chemically amplified systems.

 6. Analytical & Mechanistic Applications

• Employed as a clean phenyl radical source in spectroscopic and kinetic studies.
• Useful in probing electron‑transfer rates, photochemical pathways, and catalytic cycles.

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