Aggregation-induced phosphorescence of an anthraquinone based emitter

Area of Science:

• Materials Science
• Organic Chemistry
• Photophysics

Background:

• Room temperature phosphorescence (RTP) in metal-free organic molecules is a significant research area.
• Aggregation, crystallization, and polymer support can enhance RTP.
• Highly phosphorescent aggregates are promising for various applications.

Purpose of the Study:

• To investigate the aggregation-induced phosphorescence of an anthraquinone derivative, AqC6.
• To explore the effect of concentration and solvent-antisolvent systems on AqC6 phosphorescence.
• To evaluate the role of PMMA support in enhancing AqC6 processability and phosphorescence.

Main Methods:

• Studied aggregation-induced phosphorescence of AqC6 in solution and crystal states.
• Varied concentration and solvent-antisolvent combinations to tune emission.
• Incorporated AqC6 into PMMA (polymethyl methacrylate) matrices.

Main Results:

• Dilute AqC6 solutions showed weak emission, which was enhanced with increased concentration and specific solvent-antisolvent systems.
• Phosphorescence observed in crystals was successfully replicated in solution via aggregation.
• PMMA support improved AqC6 processability, resulting in a phosphorescence lifetime of 174 ms and a quantum yield of 5%.

Conclusions:

• Aggregation is an effective strategy to induce and enhance room temperature phosphorescence in organic molecules like AqC6.
• AqC6 exhibits tunable phosphorescence properties dependent on aggregation state and environment.
• PMMA-supported AqC6 demonstrates improved performance and processability for potential applications.