A Conjugated Phenylene Nanocage with a Guest-Adaptive Deformable Cavity

Area of Science:

• Supramolecular Chemistry
• Materials Science
• Organic Chemistry

Background:

• Organic cages are typically rigid, limiting exploration of their dynamic properties.
• The deformation potential and supramolecular behavior of phenylene-based cages are underexplored.

Purpose of the Study:

• To design and synthesize a novel, pliable conjugated phenylene nanocage.
• To investigate the guest-adaptivity and cavity deformation of the synthesized cage.

Main Methods:

• Synergistic merging of rigid and flexible building blocks.
• Incorporation of branched phenylene chains and a calix[6]arene moiety.
• Complexation studies with fullerene guests.

Main Results:

• A pliable conjugated phenylene nanocage with an anisotropic structure was successfully synthesized.
• The cage exhibits significant cavity deformability due to conformational changes in the calix[6]arene capping.
• The nanocage demonstrated excellent guest-adaptivity, with cavity volume swelling up to 85% upon complexing with fullerene guests.

Conclusions:

• The developed phenylene nanocage challenges the notion of rigidity in such structures.
• The cage's remarkable guest-adaptivity and tunable cavity size open new avenues for host-guest chemistry and materials design.