Bent Anthracene Dimers as Versatile Building Blocks for Supramolecular Capsules

Area of Science:

• Supramolecular Chemistry
• Organic Chemistry
• Materials Science

Background:

• Bent anthracene dimers serve as adaptable building blocks.
• Supramolecular capsules are crucial for molecular recognition and encapsulation.
• A decade of research has focused on developing these unique structures.

Purpose of the Study:

• To summarize investigations into bent anthracene dimers for supramolecular capsule construction.
• To explore two distinct synthetic approaches: coordination and π-stacking.
• To demonstrate the versatility and host-guest capabilities of the resulting capsules.

Main Methods:

• Design and synthesis of bent anthracene dimer building blocks.
• Conversion into bent ligands for coordination-driven assembly.
• Utilizing bent amphiphiles for π-stacking driven assembly.
• Characterization of capsule formation and guest encapsulation.

Main Results:

• Developed M2L4 coordination capsules with rigid, ~1 nm cavities binding synthetic molecules and biomolecules.
• Created π-stacking capsules with flexible cavities encapsulating hydrophobic dyes and nanocarbons.
• Demonstrated selective binding of guests like fullerene C60, hormones, and dyes.
• Engineered stimuli-responsive capsules (pH and light) for controlled guest release.
• Enhanced luminescence of Eu(III)-complexes via encapsulation.

Conclusions:

• Bent anthracene dimers are versatile platforms for creating diverse supramolecular capsules.
• Coordination and π-stacking capsules offer complementary host functions.
• These advanced molecular tools hold significant potential for synthetic, analytical, material, biological, and medical applications.