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Biomimetic Sequence-Templating Approach toward a Multiscale Modulation of Chromogenic Polymer Properties
Yuyao Kuang1, Ze-Fan Yao1,2, Sujeung Lim1
1Department of Chemical and Biomolecular Engineering, Samueli School of Engineering, University of California, Irvine, Irvine, California 92697, United States.
Macromolecules
|July 3, 2023
Summary
Researchers precisely controlled adaptive conjugated polymer properties in water by tuning peptide structure. This peptide-polydiacetylene (PDA) conjugate programmability is key for advanced biomedical applications.
Area of Science:
- Biomaterials Science
- Polymer Chemistry
- Supramolecular Chemistry
Background:
- Precision control over conjugated polymer properties in water is crucial for biomedical applications.
- Amphiphilic peptide-polydiacetylene (PDA) conjugates offer a biomimetic template for polymerization in aqueous environments.
Purpose of the Study:
- To investigate how molecular structure, specifically steric and hydrophobic contributions in peptide segments, influences PDA conjugate properties.
- To understand the impact of molecular volume and polarity on supramolecular assembly, photophysical properties, cell-material interfacing, and electrical properties of PDA films.
- To establish sequence-tunable molecular characteristics as a method for modulating PDA properties across multiple length scales.
Main Methods:
- Synthesized a library of peptide-PDAs with systematically varied dipeptide sequences.
- Investigated material properties including supramolecular assembly, photophysical characteristics, cell-material interactions, and electrical properties of water-processed films.
- Analyzed the influence of steric effects and residue hydrophobicity on material properties at different length scales.
Main Results:
- Steric effects in peptide segments primarily dictate the electronic structure and photophysical properties of PDA conjugates.
- Hydrophobicity and residue size become more significant for higher-order assemblies, impacting bulk material properties.
- Demonstrated that sequence-tunable molecular volume and polarity can rationally modulate PDA properties.
Conclusions:
- Peptide sequence engineering provides a powerful tool to program adaptive functionalities in biomimetic conjugated polymers.
- This work offers insights into controlling PDA properties for diverse biomedical applications through rational molecular design.
- Established a framework for modulating supramolecular, photophysical, and electrical properties of PDA materials in aqueous environments.
