Semiconductor Display Materials

1. Physicochemical Properties

• CAS Number: 205806-87-7
• Molecular Formula: C₂₁H₁₆F₄
• Molecular Weight: 344.34 g/mol
• Appearance: White crystalline solid.
• Purity: 98%.
• Structure: A terphenyl derivative with an ethyl substituent on one ring and 2.3.4.5-tetrafluoro substitution on the central ring.
• Key Characteristics:

The molecule combines a rigid terphenyl backbone with multiple fluorine atoms, influencing its liquid crystalline properties.

The ethyl group contributes to hydrophobic behavior, while fluorine atoms enhance stability and electronic effects.

• Boiling Point: 376.8–466.8°C.
• Density: 1.1–1.3 g/cm³.
• Flash Point: 171.8–209.6°C.

2. Synthesis Method

The compound is likely synthesized via cross-coupling reactions (e.g., Suzuki-Miyaura coupling). This involves reacting an ethyl-substituted aryl halide with a tetrafluoro-substituted arylboronic acid/ester in the presence of a palladium catalyst, a base, and a ligand. The synthesis may require:

• Protection/deprotection steps to manage reactive sites.
• Purification via chromatography or recrystallization to achieve high purity.

3. Applications

• Liquid Crystals: The rigid terphenyl structure and multiple fluorine atoms make it a candidate for liquid crystal materials, where it could influence molecular alignment and optical properties.
• Organic Electronics: Potential use in organic light-emitting diodes (OLEDs) or photovoltaic cells due to its conjugated structure and electron-withdrawing fluorine atoms.
• Specialty Coatings: The hydrophobic nature and thermal stability may be useful in advanced surface coatings.

4. Safety Information

• Handling: Follow standard chemical safety protocols (e.g., use gloves, goggles, and fume hoods). Avoid skin contact and inhalation.
• Storage: Keep in a cool, dry place, away from oxidants and strong acids.
• Disposal: Consult local regulations for hazardous waste disposal.
• Customs Code: Likely similar to related terphenyl compounds (e.g., 2902909090).

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