Ionic self-assembled wormlike nanowires and their cyclodextrin inclusion-tuned transition

Area of Science:

• Materials Science
• Supramolecular Chemistry
• Nanotechnology

Background:

• Ionic self-assembly (ISA) is a powerful technique for creating ordered nanostructures.
• Ferrocene-containing compounds offer unique redox properties.
• Controlling self-assembly is key to designing advanced materials.

Purpose of the Study:

• To synthesize and characterize novel wormlike nanowires using ISA.
• To investigate the structural and redox properties of the resulting complexes.
• To explore the transformation of these nanostructures into vesicles.

Main Methods:

• Ionic self-assembly of (ferrocenylmethyl)trimethylammonium iodide (FcMI) and sodium bis(2-ethyl-1-hexyl)sulfosuccinate (AOT).
• Characterization of FcM-AOT complexes using techniques like X-ray diffraction (implied by lattice spacing).
• Transmission electron microscopy (TEM) and dynamic light scattering (DLS) for vesicle analysis.

Main Results:

• Successful preparation of wormlike nanowires with an ordered hexagonal columnar structure (D = 2.49 nm).
• FcM-AOT complexes exhibit redox activity due to ferrocene incorporation.
• Nanowires form intricate net-like structures, some with high-order crystallinity.
• Transformation into vesicles achieved by complexation with beta-cyclodextrins.

Conclusions:

• ISA provides a versatile route to fabricate redox-active nanowires.
• The self-assembly and vesicle formation are governed by noncovalent interactions.
• This work demonstrates a pathway for creating complex supramolecular architectures with tunable properties.