Polyacrylamide-Based Binary Luminescent Copolymer Materials Exhibit Color-Tunable and Efficient Long-Lived Room...

Area of Science:

• Materials Science
• Organic Chemistry
• Photophysics

Background:

• Polymer-based organic room temperature phosphorescence (RTP) materials are of significant interest for various applications.
• Developing RTP systems with extended lifetimes and tunable emission colors is crucial for advanced technologies.

Purpose of the Study:

• To report a facile doping method for creating polymer-based RTP materials.
• To investigate the properties of copolymers with benzene/biphenyl-based light-emitting cores crosslinked via noncovalent interactions.
• To explore the potential of these materials for applications requiring tunable emission and long lifetimes.

Main Methods:

• Synthesis of two types of copolymers with benzene/biphenyl-based light-emitting cores.
• Crosslinking of copolymers via hydrogen bonding and halogen bonding.
• Doping of copolymers to achieve multicolor phosphorescence.
• Characterization of RTP properties including lifetime and quantum yield.
• Investigation of mechanisms using experimental data and theoretical calculations.

Main Results:

• Achieved persistent RTP emission with lifetimes up to 1.9 s and phosphorescence quantum yields of 40.1% in single copolymers.
• Observed multicolor phosphorescence signals in doped binary luminescent copolymer systems.
• Demonstrated effective regulation of emission color by feed ratio and irradiation wavelengths.
• Attributed long lifetimes to conformation restriction within a rigid microenvironment.

Conclusions:

• The developed facile doping method yields efficient, long-lived, and color-tunable polymer-based RTP materials.
• These materials are promising for applications in sensing, flexible electronics, bioassay, anti-counterfeiting, and dynamic information encryption.
• The study provides insights into the mechanisms governing efficient and tunable RTP in polymer systems.