Enantioselective assembly of multi-layer 3D chirality
Guanzhao Wu1,2, Yangxue Liu2, Zhen Yang1
1Institute of Chemistry and BioMedical Sciences, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China.
National Science Review
|October 25, 2021
Summary
Scientists achieved the first enantioselective synthesis of 3D chiral molecules using dual asymmetric Suzuki-Miyaura couplings. This breakthrough enables new optically pure, multi-layered chiral frameworks with unique C-symmetry and luminescence properties.
Area of Science:
- Organic Chemistry
- Supramolecular Chemistry
- Materials Science
Background:
- Chirality is crucial in chemistry and biology.
- Existing chiral structures often exhibit planar or axial chirality.
- Developing novel three-dimensional (3D) chiral architectures remains a significant challenge.
Purpose of the Study:
- To achieve the first enantioselective synthesis of sandwich-shaped organo molecules.
- To construct a novel multi-layer 3D chiral framework with C-symmetry.
- To explore the chiroptical and luminescence properties of these new chiral molecules.
Main Methods:
- Utilized dual asymmetric Suzuki-Miyaura couplings combined with nine additional reactions.
- Employed X-ray diffraction analysis to determine the molecular structure and symmetry.
- Investigated luminescence and aggregation-induced emission (AIE) properties through UV irradiation.
Main Results:
- Successfully synthesized enantioselective, sandwich-shaped organo molecules.
- Established the first fully C-C anchored multi-layer 3D chirality with optically pure enantiomers.
- Characterized a unique C-symmetric chiral framework with restricted rotation between aromatic layers.
- Observed strong luminescence and aggregation-induced emission (AIE) in most synthesized compounds.
Conclusions:
- This work presents a groundbreaking method for constructing complex 3D chiral molecules.
- The developed multi-layer 3D chirality is distinct from planar or axial chirality and relies on the integrity of its layers.
- The synthesized compounds exhibit promising photophysical properties, suggesting potential applications in optoelectronics and materials science.
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