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Topology-Driven Conformational Constraint Enables High-Temperature Organic Phosphorescence
Tongyue Wu1, Chengshuo Xu1, Weijiang Guan1
1State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing, China.
Angewandte Chemie (International Ed. in English)
|April 24, 2026
Summary
Researchers developed a topology-driven strategy for stable high-temperature organic phosphorescence. By confining emitters in a rigid framework, they achieved persistent emission even at 150°C.
Area of Science:
- Materials Science
- Organic Chemistry
- Supramolecular Chemistry
Background:
- Organic phosphorescence is crucial for lighting and displays.
- High temperatures typically degrade phosphorescent materials by accelerating non-radiative decay.
- Developing stable organic phosphorescent materials for high-temperature applications remains a significant challenge.
Purpose of the Study:
- To investigate a topology-driven conformational constraint strategy for achieving high-temperature organic phosphorescence.
- To explore the relationship between emitter geometry and phosphorescence performance within a supramolecular framework.
- To develop environmentally robust organic phosphorescent materials for demanding conditions.
Main Methods:
- Constructed a hydrogen-bonded supramolecular framework using melamine and terephthalic acid as a rigid scaffold.
- Embedded terphenyl-based emitters with varying geometries (linear, bent, trigonal-like) within the framework.
- Investigated phosphorescence performance, including emission lifetime and stability at elevated temperatures.
Main Results:
- Demonstrated that topological confinement within the supramolecular framework effectively constrains emitter conformations.
- Observed a clear geometry-dependent trend in phosphorescence, with trigonal-like emitters showing superior performance.
- Achieved persistent phosphorescence with a lifetime of 1.22 s at room temperature and 344 ms at 150°C.
- Fabricated flexible luminescent films from these materials for high-temperature operation.
Conclusions:
- Topology-driven conformational constraint is an effective strategy for enhancing the thermal stability of organic phosphorescence.
- The rigidity and connectivity of the supramolecular framework play a critical role in reducing non-radiative decay pathways.
- The developed materials exhibit excellent environmental stability and potential for high-temperature optoelectronic applications.
Keywords:
high‐temperature phosphorescencehydrogen‐bonded frameworkssupramolecular materialstopological confinementMore Related Videos
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