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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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Pathway-directed recyclable chirality inversion of coordinated supramolecular polymers
Kuo Fu1, Yanli Zhao2, Guofeng Liu3,4
1School of Chemical Science and Engineering, Advanced Research Institute, Shanghai Key Laboratory of Chemical Assessment and Sustainability, Tongji University, Shanghai, 200092, P. R. China.
Nature Communications
|November 5, 2024
Summary
Researchers developed metal-ion systems to control dynamic chirality inversion in supramolecular materials. This breakthrough enables pathway-directed assembly and offers new possibilities for chiral spintronics and data encryption.
Area of Science:
- Supramolecular Chemistry
- Materials Science
- Chirality Studies
Background:
- Dynamic chirality inversion in complex supramolecular assemblies remains poorly understood.
- Controlling pathway complexity is crucial for designing advanced functional materials.
Purpose of the Study:
- To establish metal-ion driven assembly systems for pathway-directed chirality inversion.
- To investigate assembly polymorphism and recyclability in supramolecular materials.
- To explore applications in data encryption and chiral spintronics.
Main Methods:
- Metal coordination-driven self-assembly using pyridyl-conjugated cholesterol (PVPCC) and metal ions (Ag+, Al3+).
- Analysis of competitive and solvent-assisted consecutive pathways.
- Characterization of chiroptical properties and assembly states (Ag-SP I, Ag-SP II, Al-SP I, Al-SP II).
- Demonstration of solid-state chirality inversion and circularly polarized luminescence encryption.
Main Results:
- Ag(I)/PVPCC system exhibits a competitive pathway leading to kinetically controlled (Ag-SP I) or thermodynamically favored (Ag-SP II) structures with reversible chiroptical inversion.
- Al(III)/PVPCC system shows a solvent-assisted pathway, converting an ethanol-containing intermediate (Al-SP II) to an ethanol-free form (Al-SP I) with opposite chiroptical properties upon heating.
- Stable solid-state chirality inversion was achieved, enabling dynamic circularly polarized luminescence encryption when co-assembled with thioflavin T.
Conclusions:
- Metal coordination provides a powerful strategy for controlling dynamic chirality inversion and polymorphism in supramolecular assemblies.
- The demonstrated pathway-directed and recyclable chirality modulation offers significant potential for advanced applications.
- Findings guide the development of supramolecular materials for information processing, data encryption, and chiral spintronics.
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