Fabrication of a β-cyclodextrin-based self-assembly containing a redox-responsive ferrocene

Area of Science:

• Supramolecular Chemistry
• Materials Science
• Nanotechnology

Background:

• Ferrocene (Fc) and β-cyclodextrin (β-CD) are key components in host-guest chemistry.
• Redox-responsive materials offer tunable properties for advanced applications.
• Self-assembly is a fundamental process for creating complex nanostructures.

Purpose of the Study:

• To synthesize a novel ferrocene-containing β-cyclodextrin derivative (βCD-EG-Fc).
• To investigate the redox-sensitive self-assembly behavior of βCD-EG-Fc.
• To explore the potential for reversible aggregate transformation in a single-component system.

Main Methods:

• Synthesis of the βCD-EG-Fc derivative.
• Characterization of self-assembled structures using various techniques (e.g., microscopy, spectroscopy).
• Redox manipulation to induce and observe structural changes.

Main Results:

• βCD-EG-Fc self-assembled into network-like structures driven by hydrogen bonding and host-guest interactions.
• Aging led to the transformation of networks into vesicles.
• Oxidized βCD-EG-Fc+ formed cationic vesicles independently of host-guest complexation.
• Reversible transformation between aggregate structures was achieved by controlling redox states.

Conclusions:

• A redox-responsive self-assembly system based on β-cyclodextrin and ferrocene was successfully fabricated.
• The study demonstrated reversible aggregate transformations controlled by redox stimuli.
• This work contributes to understanding β-CD/Fc redox-responsive systems and single-component host-guest models.