Related Experiment Video
Updated: Jun 4, 2026
05:24
Preparation of Mechanically Stable Self-Assembled Peptides Hydrogels
Published on: September 6, 2024
Supramolecular hydrogels based on short peptides linked with conformational switch
Yucheng Huang1, Zhenjun Qiu, Yanmei Xu
1School of Chemistry and Chemical Engineering, Key Lab of Analytical Chemistry for Life Science, Ministry of Education of China, Nanjing University, Nanjing, 210093, China.
Organic & Biomolecular Chemistry
|February 8, 2011
Summary
Short peptides with azobenzene switches form pH-dependent supramolecular hydrogels. Aromatic residues promote gelation, while cationic ones hinder it, enabling smart hydrogel development.
Area of Science:
- Supramolecular Chemistry
- Materials Science
- Biotechnology
Background:
- Supramolecular hydrogels are advanced materials with diverse applications.
- Controlling hydrogel properties through external stimuli is crucial for smart materials.
- Azobenzene derivatives offer photoresponsive control over molecular conformation.
Purpose of the Study:
- To investigate the hydrogelation properties of short peptides linked to an azobenzene conformational switch.
- To explore the influence of amino acid sequence, pH, and salt concentration on hydrogel formation.
- To develop photoresponsive supramolecular hydrogels with tunable properties.
Main Methods:
- Synthesis of short peptides functionalized with an azobenzene unit.
- Characterization of hydrogelation properties, including pH and salt dependence.
- Investigation of photoresponsive behavior upon light irradiation (E-/Z- isomerization).
Main Results:
- Peptide sequence, particularly aromatic residues (Phe, Tyr), significantly impacts hydrogelation.
- Cationic residues (Arg, Lys) were found to be unfavorable for hydrogel formation.
- Hydrogelation is pH and salt-dependent, with optimal conditions identified.
- Photoresponsive supramolecular hydrogels were successfully created, exhibiting stimulus-responsive behavior.
Conclusions:
- Short peptides coupled with azobenzene switches are effective motif- and pH-dependent supramolecular hydrogelators.
- The rational design of peptide sequences allows for the development of smart hydrogels responsive to multiple stimuli.
- These findings open avenues for creating advanced photoresponsive biomaterials.
