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Updated: Aug 23, 2025
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Self-assembling Morphologies Obtained from Helical Polycarbodiimide Copolymers and Their Triazole Derivatives
Published on: February 7, 2017
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Hierarchically self-assembled homochiral helical microtoroids.
Cong Du1, Zujian Li1, Xuefeng Zhu1
1Beijing National Laboratory of Molecular Sciences and CAS Key Laboratory of Colloid, Interface and Thermodynamics, Institute of Chemistry, Chinese Academy of Sciences, Beijing, China.
Nature Nanotechnology
|November 4, 2022
Summary
Researchers developed a novel self-assembly method to create helical microstructures. This technique precisely controls chirality in hierarchical assemblies, enabling new applications in chiral materials science.
Area of Science:
- Supramolecular Chemistry
- Materials Science
- Nanotechnology
Background:
- Fabricating microscale helical structures from small molecules is difficult due to unfavorable torsion energy and chirality control challenges.
- Hierarchical self-assembly offers a pathway to complex chiral architectures.
Purpose of the Study:
- To develop a strategy for fabricating hierarchically self-assembled helical microstructures with controlled chirality.
- To investigate the mechanism of helical microtoroid formation and its dependence on molecular chirality.
Main Methods:
- Utilized a combined solution-interface-directed assembly strategy.
- Employed a drop-evaporation assembly protocol on a solid substrate using pre-assembled intermediate colloids.
- Conducted variable-temperature spectroscopic analyses, electron microscopy, and theoretical simulations.
Main Results:
- Successfully formed hierarchically self-assembled helical microtoroids with micrometre-scale lengths.
- Demonstrated that the preferred helicity of microtoroids depends on the molecular chirality of the starting enantiomers.
- Revealed a mechanism involving simultaneous aggregation and cyclization for imparting favorable handedness.
Conclusions:
- The combined solution-interface-directed self-assembly approach effectively directs hierarchical chirality control.
- Monodispersed luminescent helical toroids function as efficient chiral light-harvesting antennas with excellent Förster resonance energy transfer (FRET) capabilities.
- This work advances the prospects of creating chiral superstructures at larger length scales.
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