4,4 ‘- di (1-naphthyl) diphenylamine
Semiconductor Display Materials 2025-03-04
1. Physicochemical Properties
- Melting Point: 252–258°C
- Boiling Point: 634.3±50.0°C (predicted)
- Density: 1.229±0.06 g/cm³ (predicted)
- Appearance: White to light yellow/orange solid
- Storage: Keep in a sealed, dark container at room temperature.
- Acidity (pKa): 1.57±0.30 (predicted)
2. Synthesis Method
The compound is synthesized via alkylation of diphenylamine with 1-methylstyrene, optimized with a specific catalyst. Key conditions include:
Molar ratio of 1-methylstyrene to diphenylamine (2.6:1)
Catalyst concentration (14% by mass of diphenylamine)
Reaction temperature (160°C)
Reaction time (2.5 hours)
This yields a product with >97% purity.
3. Applications
Primarily used in organic light-emitting diode (OLED) devices as a hole-injection layer (HIL) material due to its electron-rich structure. It enhances charge transport efficiency and stability in OLEDs.
4. Safety Information
- Hazard Statements: Classified under GHS05 and GHS02 (“Danger”).
- Precautions: Follow safety protocols (e.g., P501. P240) to avoid skin/eye contact and inhalation.
- Customs Code: 2921599090.
This summary provides a concise overview of the compound’s key attributes for research and application purposes.
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