Self-assembly of indolocarbazole-containing macrocyclic molecules

Area of Science:

• Organic Chemistry
• Supramolecular Chemistry
• Materials Science

Background:

• Indolocarbazole derivatives are important in various fields.
• Macrocyclic compounds offer unique structural and functional properties.
• Pi-pi stacking and hydrogen bonding are key non-covalent interactions in molecular self-assembly.

Purpose of the Study:

• To develop a novel synthetic strategy for indolocarbazole-containing macrocycles.
• To investigate the self-assembly behavior of these macrocycles in the presence of anions.
• To explore the role of pi-pi stacking and hydrogen bonding in directing macrocycle folding and anion recognition.

Main Methods:

• Synthesis of indolocarbazole-containing precursors.
• Application of click-chemistry reactions for macrocyclization.
• Pi-pi stacking preorganization strategies.
• Single-crystal X-ray diffraction analysis for structural characterization.
• Anion binding studies to observe self-assembly.

Main Results:

• A successful synthetic route for indolocarbazole macrocycles was established.
• The macrocycles adopt folded conformations driven by intramolecular hydrogen bonding and pi-pi stacking.
• Two representative macrocycles were structurally elucidated by X-ray diffraction.
• Distinct self-assembly patterns with various anions were observed, mediated by N-H...X(-) and triazole C-H...X(-) hydrogen bonds.

Conclusions:

• The developed approach enables the construction of complex indolocarbazole macrocycles.
• These macrocycles exhibit controllable folding and self-assembly behavior.
• The findings provide insights into anion-macrocycle interactions governed by specific hydrogen bonding motifs.