pH-Responsive, Amphiphilic Core-Shell Supramolecular Polymer Brushes from Cyclic Peptide-Polymer Conjugates

Area of Science:

• Biomaterials Science
• Polymer Chemistry
• Supramolecular Chemistry

Background:

• pH-responsive materials are crucial for controlled drug delivery and diagnostics.
• Amphiphilic conjugates combine properties of peptides and polymers for advanced functionalities.
• Self-assembly into nanostructures offers unique platforms for molecular organization.

Purpose of the Study:

• To synthesize and characterize novel pH-responsive, amphiphilic cyclic peptide-polymer conjugates.
• To investigate the self-assembly behavior of these conjugates in response to pH changes.
• To explore the potential of these conjugates for forming nanostructures like nanotubes.

Main Methods:

• Synthesis of cyclic peptide-polymer conjugates incorporating a poly(2-(diisopropylamino)ethyl methacrylate) (pDPA) block.
• pH-dependent characterization using titration experiments.
• Structural analysis of self-assembled nanostructures via scattering techniques.

Main Results:

• Successful synthesis of pH-responsive amphiphilic cyclic peptide-polymer conjugates.
• Demonstrated disassembly and protonation of conjugates at low pH.
• Observed self-assembly into core-shell nanotubes at physiological pH.

Conclusions:

• The designed peptide-polymer conjugates exhibit tunable pH-responsive behavior.
• The introduction of the pDPA block enables pH-triggered self-assembly into nanotubes.
• These findings present a promising platform for developing advanced responsive nanomaterials.