Multimechanophore Polymers for Mechanically Triggered Small Molecule Release with Ultrahigh Payload Capacity

Area of Science:

• Polymer Chemistry
• Materials Science
• Mechanochemistry

Background:

• Polymers releasing molecules under mechanical force are useful for drug delivery, catalysis, and sensing.
• Existing mechanophores have limited cargo scope or payload capacity per polymer chain.

Purpose of the Study:

• To develop a novel nonscissile mechanophore for ultrahigh payload capacity.
• To create multimechanophore polymers capable of releasing numerous small-molecule payloads.

Main Methods:

• Utilized a masked 2-furylcarbinol derivative as a nonscissile mechanophore.
• Synthesized multimechanophore polymers via ring-opening metathesis polymerization.
• Activated cargo release using ultrasound-induced mechanochemical activation.

Main Results:

• Demonstrated the release of hundreds of small-molecule payloads per polymer chain.
• Achieved ultrahigh payload capacity, overcoming limitations of previous designs.
• Showcased the potential for significantly higher concentrations of delivered cargo.

Conclusions:

• The nonscissile masked 2-furylcarbinol mechanophore enables unprecedented cargo loading.
• This advancement expands possibilities for mechanophore-driven applications requiring high payload delivery.
• Future applications in drug delivery, sensing, and catalysis can benefit from this enhanced capacity.