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Reversible Multilevel Stimuli-Responsiveness and Multicolor Room-Temperature Phosphorescence Emission Based on a
Jinming Song1, Liangwei Ma1, Siyu Sun1
1Key Laboratory for Advance Materials and Feringa Noble Prize Scientist Joint Research Centre, Frontiers Science for Materiobiology and Dynamic Chemistry, School of Chemistry and Molecular Engineering, East China University of Science & Technology, Meilong Road 130, Shanghai, 200237, China.
Researchers developed a single-component organic molecule (N-BOX) that switches between blue and yellow room-temperature phosphorescence (RTP) when stimulated by grinding or heat. This breakthrough offers new possibilities for smart optical materials.
Area of Science:
- Materials Science
- Organic Chemistry
- Photophysics
Background:
- Limited reports exist on pure organic room-temperature phosphorescence (RTP) materials with multilevel stimuli-responsiveness.
- Achieving efficient intersystem crossing (ISC) in single-component systems across different states is challenging.
Purpose of the Study:
- To report the conversion of an organic single-component small molecule (N-BOX) with multilevel stimuli-responsiveness.
- To demonstrate switching between high-efficiency blue and yellow RTP emissions under external stimuli.
Main Methods:
- Utilized the organic molecule 1,2-bis(4-alkoxyphenyl)ethane-1,2-dione (N-BOX).
- Applied external stimuli such as grinding and thermal annealing to N-BOX crystals.
- Investigated phase transitions induced by stimuli due to non-compact crystal packing.
Main Results:
- N-BOX exhibited multilevel stimuli-responsiveness, transitioning between blue and yellow RTP.
- Stimuli (grinding, thermal annealing) effectively tuned the RTP emission wavelength.
- The RTP quantum yield of the 7-BOX derivative reached 68.4%.
Conclusions:
- The study successfully demonstrates multilevel stimuli-responsiveness in a single-component organic RTP material.
- The facile tunability of RTP emission via external stimuli opens avenues for smart optical materials.
- The findings highlight the potential of N-BOX for advanced optoelectronic applications.
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