Color-Tunable Room-Temperature Phosphorescence from Non-Aromatic-Polymer-Involved Charge Transfer

Area of Science:

• Materials Science
• Polymer Chemistry
• Photophysics

Background:

• Polymeric room-temperature phosphorescence (RTP) materials are crucial for applications requiring persistent light emission.
• Achieving multicolor and color-tunable RTP, especially from non-aromatic systems via charge transfer, remains a significant challenge.
• Current RTP materials often rely on aromatic components, limiting design flexibility.

Purpose of the Study:

• To develop a novel non-aromatic charge-transfer-mediated RTP material.
• To achieve color-tunable phosphorescence from a non-aromatic polymer matrix.
• To explore through-space charge transfer (TSCT) for enhanced RTP properties.

Main Methods:

• Embedding quinoline derivatives into non-aromatic polymer matrices like polyacrylamide (PAM) or polyvinyl alcohol (PVA).
• Utilizing alkali or heat treatment to induce through-space charge transfer (TSCT).
• Characterizing phosphorescence properties including lifetime, quantum yield, and emission spectra.

Main Results:

• Successfully fabricated a charge-transfer-mediated RTP material using non-aromatic polymers.
• Achieved a long phosphorescence lifetime up to 629.90 ms and a high quantum yield up to 20.51%.
• Demonstrated a color-tunable green-to-blue afterglow lasting over 20 s at room temperature via TSCT.

Conclusions:

• A novel approach for creating color-tunable RTP materials from non-aromatic polymers has been established.
• The developed material exhibits promising properties for applications in multicolor displays, information encryption, and gas detection.
• This work opens new avenues for designing advanced phosphorescent materials through non-aromatic charge transfer mechanisms.