Modular Synthesis of Phenazine-Based Aggregation-Induced Emission Materials

Area of Science:

• Organic Chemistry
• Materials Science
• Supramolecular Chemistry

Background:

• Phenazine derivatives are known for their optical properties.
• Aggregation-induced emission (AIE) is a phenomenon where molecules become more emissive upon aggregation.
• Controlling aggregate size and morphology is crucial for material applications.

Purpose of the Study:

• To synthesize novel phenazine-based luminogens.
• To investigate their aggregation-induced emission (AIE) properties.
• To characterize the size and structure of the aggregates formed.

Main Methods:

• Facile condensation reaction of bis(triphenylethylene)-functionalized ortho-phenylenediamine with ortho-quinones.
• Fluorescence spectroscopy to study AIE behavior.
• Dynamic light scattering (DLS), confocal microscopy, and scanning electron microscopy (SEM) for aggregate characterization.

Main Results:

• Four new phenazine derivatives were synthesized in high yield.
• All derivatives exhibited AIE in THF/water mixtures (≥60% water).
• Aggregate size decreased with increasing water percentage, forming roughly spherical particles.

Conclusions:

• The synthesized phenazine derivatives are efficient AIE luminogens.
• The study demonstrates control over aggregate size by adjusting water content.
• These findings open avenues for developing tunable AIE materials.