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Updated: Apr 8, 2026

Self-assembling Morphologies Obtained from Helical Polycarbodiimide Copolymers and Their Triazole Derivatives
Published on: February 7, 2017
Mechanically selflocked chiral gemini-catenanes
Sheng-Hua Li1, Heng-Yi Zhang1, Xiufang Xu1
1Department of Chemistry, State Key Laboratory of Elemento-Organic Chemistry, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Nankai University, Tianjin 300071, China.
Researchers developed a new method to create mechanically selflocked molecules (MSMs) using pillar[5]arene and diaminoalkane. This efficient process yields chiral pseudo[1]catenanes and gemini-catenanes for advanced materials science.
Area of Science:
- Supramolecular Chemistry
- Materials Science
- Organic Synthesis
Background:
- Mechanically interlocked molecules (MIMs) are complex topological structures.
- Pillar[5]arenes (P[5]A) are versatile macrocyclic hosts.
- Controlling molecular topology is crucial for advanced materials.
Purpose of the Study:
- To develop an efficient method for synthesizing mechanically selflocked molecules (MSMs).
- To explore the fabrication of chiral pseudo[1]catenanes and gemini-catenanes.
- To characterize the topological and stereochemical properties of the synthesized architectures.
Main Methods:
- One-step amidation reaction of a pseudorotaxane precursor.
- Synthesis involved dual functionalized pillar[5]arene (P[5]A) and α,ω-diaminoalkane (DA-n).
- Characterization using NMR, circular dichroism spectroscopy, X-ray crystallography, and DFT calculations.
Main Results:
- Successfully synthesized monomeric and dimeric pseudo[1]catenanes.
- The synthesized molecules are inherently chiral due to the P[5]A topology.
- Dimeric pseudo[1]catenanes ('gemini-catenanes') exhibited distinct meso-erythro and dl-threo stereoisomers.
Conclusions:
- A facile and efficient methodology for constructing mechanically selflocked molecules is established.
- Access to chiral pseudo[1]catenanes and gemini-catenanes is significantly enhanced.
- These findings will advance the application of sophisticated chiral architectures in supramolecular chemistry and materials science.
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