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Updated: Oct 3, 2025
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Synthesis of Information-bearing Peptoids and their Sequence-directed Dynamic Covalent Self-assembly
Published on: February 6, 2020
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Single-atom substitution enables supramolecular diversity from dipeptide building blocks
Erica Scarel1, Ottavia Bellotto1, Petr Rozhin1
1University of Trieste, Chem. Pharm. Sc. Dept., Via Giorgieri 1, 34127 Trieste, Italy. smarchesan@units.it.
Soft Matter
|February 18, 2022
Summary
Simple halogen substitutions on phenylalanine dipeptides create diverse self-assembled supramolecular structures like hydrogels or crystals. This research explores their unique properties for various applications.
Area of Science:
- Supramolecular chemistry
- Materials science
- Organic chemistry
Background:
- Dipeptides are versatile building blocks for environmentally friendly supramolecular gels.
- Self-assembly of dipeptides offers potential for diverse applications.
Purpose of the Study:
- To investigate the impact of halogen substitution on phenylalanine dipeptides.
- To explore the resulting supramolecular diversity and material properties.
Main Methods:
- Characterization using NMR spectroscopy, LC-MS, and circular dichroism.
- Analysis of self-assembly via rheology, electron microscopy, and various spectroscopy techniques.
- Structural elucidation using synchrotron-radiation single-crystal X-ray diffraction.
Main Results:
- Fluorine or iodine substitution on phenylalanine dipeptides induces different self-assembly behaviors.
- Neutral pH conditions lead to the formation of either hydrogels or crystals.
- Detailed analysis revealed key differences between halogenated analogues.
Conclusions:
- Halogenated phenylalanine dipeptides offer tunable supramolecular diversity.
- These materials show potential for applications requiring controlled self-assembly.
- The study highlights the influence of subtle chemical modifications on material properties.
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