C-H Activation-Based Multicomponent Polyannulations toward Fluorescent Heteroaromatic Polyelectrolytes for...

Area of Science:

• Polymer Chemistry
• Materials Science
• Organic Synthesis

Background:

• Developing efficient synthetic routes for functional main-chain charged polyelectrolytes remains a significant challenge.
• Existing methods often struggle to produce diverse structures with high molecular weights and yields.

Purpose of the Study:

• To introduce a facile and efficient C-H activation-based multicomponent polyannulation method for synthesizing functional main-chain charged polyelectrolytes.
• To explore the properties and applications of the synthesized polyelectrolytes, particularly their antibacterial activity.

Main Methods:

• Utilized a one-pot C-H activation/annulation strategy involving internal diynes, aldehydes, and amines.
• Synthesized diverse functional main-chain charged polyelectrolytes with high molecular weights (up to 55000 g/mol) and yields (up to 99.2%).
• Generated multisubstituted polycyclic heteroaromatic cations within the polymer backbones as π spacers.

Main Results:

• Achieved high molecular weights and yields in the synthesis of novel polyelectrolytes.
• The resulting polymers demonstrated excellent solubility, film-forming ability, thermal stability, and tunable luminescence.
• Exhibited remarkable light-enhanced bactericidal activity against Gram-positive bacteria due to efficient reactive oxygen species generation.

Conclusions:

• The developed C-H activation method provides a versatile platform for creating advanced functional polyelectrolytes.
• The synthesized polyelectrolytes show significant potential as sunlight-triggered antibacterial coatings for gentle sterilization applications.