Edge-Decorated Polycyclic Aromatic Hydrocarbons by an Oxidative Coupling Approach.

Area of Science:

• Organic Chemistry
• Materials Science
• Synthetic Chemistry

Background:

• Conventional redox neutral couplings often rely on halo/metalated substrates.
• Oxidative phenol coupling offers an alternative, reducing the need for such reagents.

Purpose of the Study:

• To develop a novel strategy for synthesizing polycyclic aromatic hydrocarbons (PAHs).
• To utilize oxidative phenol coupling for efficient construction of complex aromatic systems.

Main Methods:

• A three-stage synthetic approach was employed: oxidative fragment coupling, unit linking, and oxidative cyclization.
• The protocol facilitates the rapid assembly of both planar and helical PAH architectures.

Main Results:

• The developed protocol allows for high degrees of edge functionalization in the synthesized PAHs.
• Incorporating 12 alkoxy groups on 12-ring systems resulted in lower optical gaps compared to less functionalized systems.

Conclusions:

• The new strategy provides a versatile route to functionalized PAHs.
• Oxidative phenol coupling is a viable method for constructing complex aromatic systems with tailored optoelectronic properties.