A metallosupramolecular-based ring-in-ring complex showing reversible host-guest dynamics and switchable...

Area of Science:

• Supramolecular Chemistry
• Materials Science
• Electrochemistry

Background:

• Reversible host-guest interactions are key for developing reusable and efficient advanced materials.
• Designing adaptable molecular systems requires understanding host-guest dynamics.

Purpose of the Study:

• To synthesize a pyrene-naphthalenediimide-based heterocyclophane and encapsulate it within an iridium metallobox.
• To investigate the electrochemical and dynamic properties of the resulting host-guest complex.
• To explore controlled guest uptake and release mechanisms.

Main Methods:

• Synthesis of a pyrene-naphthalenediimide heterocyclophane.
• Encapsulation within an iridium-cornered nanosized metallobox.
• Electrochemical studies (cyclic voltammetry).
• Variable temperature 1H NMR spectroscopy.

Main Results:

• High binding affinity between the heterocyclophane and the iridium metallobox.
• Encapsulation significantly modifies the cyclophane's redox behavior, particularly NDI reduction.
• Radical species formation is stabilized within the metallobox cavity.
• Guest release and uptake are precisely controlled by chloride or silver(I) ions.

Conclusions:

• The study demonstrates a novel metallosupramolecular assembly with tunable host-guest dynamics.
• Controlled guest manipulation is achievable through external stimuli (ions).
• Findings contribute to the development of advanced materials for controlled guest release and uptake.