Photo-Responsive Dynamic Organic Room-Temperature Phosphorescence Materials Based on a Functional Unit Combination...

Area of Science:

• Materials Science
• Organic Chemistry
• Photophysics

Background:

• Purely organic room-temperature phosphorescence (RTP) materials offer tunable luminescence properties for advanced applications.
• Developing RTP materials with precisely regulated characteristics is crucial for their functional integration.
• Existing strategies often lack the modularity for systematic design and property control.

Purpose of the Study:

• To propose a rational molecular design strategy for creating novel, purely organic RTP materials.
• To achieve precisely regulated and tunable luminescence properties (color and lifetime) in RTP materials.
• To explore new application possibilities for photo-responsive dynamic RTP materials.

Main Methods:

• A functional unit combination strategy was employed, integrating a folding unit with diverse luminescent cores.
• The folding unit was designed to enhance spin-orbit coupling (SOC), crucial for phosphorescence.
• The luminescent cores were varied to tune the RTP properties.

Main Results:

• A series of color- and lifetime-tunable purely organic RTP materials were successfully designed and synthesized.
• The developed RTP materials exhibited unique photo-responsive enhancement upon UV irradiation.
• The material design strategy proved as workable as a building block principle.

Conclusions:

• The proposed strategy offers a simple and effective method for designing purely organic RTP materials with tunable properties.
• The developed materials demonstrate potential for applications in reusable privacy tags, advanced encryption, and polymer analysis.
• This work expands the application scope of photo-responsive dynamic RTP materials.