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Updated: Jul 3, 2026

Synthesis of Information-bearing Peptoids and their Sequence-directed Dynamic Covalent Self-assembly
Published on: February 6, 2020
Supramolecular substitution reactions between hydrazide-based molecular duplex strands: complexation induced
Yong Yang1, Jun-Feng Xiang, Min Xue
1Beijing National Laboratory for Molecular Sciences, Center for Chemical Biology, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China.
Supramolecular substitution reactions enable hydrazide-based oligomers to form new structures. These findings guide the design of advanced functional materials through controlled hydrogen bonding interactions.
Area of Science:
- Supramolecular Chemistry
- Polymer Science
- Organic Chemistry
Background:
- Oligomers can self-assemble into duplex or zipper structures via hydrogen bonds in nonpolar solvents.
- Understanding self-assembly is key to designing functional supramolecular materials.
Purpose of the Study:
- Investigate supramolecular substitution reactions between different hydrazide-based oligomers.
- Explore the formation of heterodimers and the influence of symmetry on complexation.
- Elucidate structure-property relationships for designing tunable functional materials.
Main Methods:
- Synthesis and characterization of hydrazide-based oligomers (1a-c and 2a-c).
- Nuclear Magnetic Resonance (NMR) spectroscopy to study complex formation and dynamics.
- Variable-temperature (1)H NMR to probe dynamic behaviors.
- Observation of gel-sol transitions as evidence of supramolecular interactions.
Main Results:
- Supramolecular substitution reactions lead to heterodimer formation driven by enhanced hydrogen bonding.
- Complexation-induced nonsymmetry observed with symmetric and nonsymmetric oligomers.
- Two distinct hydrogen-bonded isomers formed when two nonsymmetric oligomers interacted.
- Unique dynamic behaviors and temperature-dependent spectral complexity were observed, influenced by specific oligomer structures.
Conclusions:
- Hydrazide-based oligomers undergo predictable supramolecular substitution reactions.
- Hydrogen bonding interactions dictate the assembly and properties of these oligomers.
- The study provides a framework for designing hydrazide-based functional materials with tunable properties.
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