Mechanochemical green synthesis of hyper-crosslinked cyclodextrin polymers

Area of Science:

• Materials Science
• Polymer Chemistry
• Green Chemistry

Background:

• Cyclodextrin nanosponges (CD-NS) are versatile nanostructured polymers with potential biomedical applications.
• Traditional synthesis methods often rely on organic polar aprotic solvents, which can impact the final product characteristics.

Purpose of the Study:

• To develop a novel, environmentally friendly synthetic pathway for cyclodextrin nanosponges.
• To investigate the feasibility of using mechanochemistry for CD-NS synthesis.
• To demonstrate the functionalization capabilities of the synthesized CD-NS.

Main Methods:

• Utilized mechanochemistry, specifically ball milling, for the synthesis of CD-NS.
• Employed 1,1-carbonyldiimidazole as a crosslinker in a solvent-free process.
• Functionalized the resulting polymer with organic dyes (fluorescein, methyl red, rhodamine B).

Main Results:

• Successfully synthesized CD-NS using a green, solvent-free mechanochemical approach.
• The obtained polymer exhibited comparable characteristics to conventionally synthesized CD-based carbonate NS.
• Demonstrated facile post-synthesis functionalization via reaction with organic dyes.

Conclusions:

• Mechanochemistry offers a sustainable and efficient alternative for CD-NS synthesis.
• The solvent-free method yields high-quality CD-NS suitable for further modification.
• This approach broadens the scope for developing advanced functionalized nanosponges.