Mechanically interlocked molecules incorporating cucurbituril and their supramolecular assemblies

Area of Science:

• Supramolecular Chemistry
• Materials Science
• Organic Chemistry

Background:

• Mechanically interlocked molecules (MIMs) offer unique structural and functional properties.
• Cucurbiturils (CB[6]) are macrocyclic hosts capable of forming stable inclusion complexes.
• The controlled synthesis of complex MIM architectures remains a challenge.

Purpose of the Study:

• To describe the synthesis and characterization of MIMs and their supramolecular assemblies incorporating cucurbituril (CB[6]).
• To explore the formation of 1D, 2D, and 3D polyrotaxanes and molecular necklaces.
• To investigate the functional properties of these novel supramolecular structures.

Main Methods:

• Utilizing a combination of self-assembly and coordination chemistry for efficient synthesis.
• Characterizing the structural regularity and assembly of polyrotaxanes and molecular necklaces.
• Exploring functional aspects including molecular machines, switches, and interactions with biological molecules.

Main Results:

• Achieved efficient synthesis of 1D, 2D, and 3D polyrotaxanes with high structural regularity.
• Successfully constructed molecular necklaces using cucurbituril (CB[6]) as a molecular bead.
• Demonstrated functional aspects such as molecular machines, switches, and interactions with DNA.

Conclusions:

• Cucurbituril-based mechanically interlocked molecules and their assemblies can be efficiently synthesized.
• These structures exhibit promising potential for applications in molecular machines, switches, and biomolecular interactions.
• The developed synthetic strategies enable the creation of complex and regular supramolecular architectures.