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Probing Multilevel Chiroptical Activity in Organic Supramolecular Microcrystals for High-Performance Circularly
Shizhe Ren1,2, Zheng-Fei Liu3, Penghao Li1,2
1Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China.
Angewandte Chemie (International Ed. in English)
|June 24, 2025
Summary
Researchers explored multilevel chiroptical activity in organic supramolecular microcrystals to advance circularly polarized lasers. This study reveals the roles of excimers and supramolecular helices, enabling low-threshold lasing with high performance.
Area of Science:
- Materials Science
- Optics
- Organic Chemistry
Background:
- Chiral organic materials show promise for circularly polarized lasing (CPL).
- Mechanistic understanding of CPL in organic systems is underdeveloped, hindering laser development.
- Exploring multilevel chiroptical activity is key to advancing CPL technologies.
Purpose of the Study:
- To investigate multilevel chiroptical activity in organic supramolecular microcrystals.
- To understand the mechanisms behind high-performance circularly polarized lasing.
- To guide the rational design of chiral organic materials for CPL.
Main Methods:
- Tracking chiroptical activity evolution from monomers to dimers to supramolecular helices.
- Analyzing the roles of excimers and supramolecular structures in optical gain and chiroptical properties.
- Fabricating and characterizing organic supramolecular microcrystals for lasing experiments.
Main Results:
- Demonstrated the crucial roles of excimers and supramolecular helices in achieving high optical gain.
- Revealed significant chiroptical activity in supramolecular assemblies.
- Achieved circularly polarized lasing with low thresholds and large dissymmetry factors in microcrystals.
Conclusions:
- Mechanistic research into chirality-induced CPL has begun.
- Supramolecular helices and excimers are vital for high-performance CPL.
- This work provides a foundation for designing advanced chiral organic materials for CPL applications.
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