Pillar[5]- and pillar[6]arene-based supramolecular assemblies built by using their cavity-size-dependent host-guest...

Area of Science:

• Supramolecular Chemistry
• Organic Chemistry
• Macrocyclic Chemistry

Background:

• Pillar[n]arenes are novel pillar-shaped macrocyclic hosts synthesized starting in 2008.
• Pillar[5]arenes and pillar[6]arenes are widely utilized due to high synthesis yields.
• Existing supramolecular assemblies predominantly use pillar[5]- and pillar[6]arene frameworks.

Purpose of the Study:

• To detail supramolecular assemblies constructed via host-guest interactions.
• To investigate the influence of cavity size in pillar[5]- and pillar[6]arenes.
• To examine how rim substituents affect pillararene properties and assembly formation.

Main Methods:

• Synthesis and characterization of pillar[n]arene derivatives.
• Host-guest binding studies to evaluate cavity interactions.
• Analysis of substituent effects on solubility, functionality, and host-guest properties.

Main Results:

• Supramolecular assemblies are effectively built using pillar[5]- and pillar[6]arene hosts.
• Cavity size significantly dictates host-guest complexation.
• Rim substituents modulate solubility, functionality, and binding affinities.

Conclusions:

• Pillar[5]- and pillar[6]arenes are valuable platforms for designing supramolecular architectures.
• Host-guest chemistry of pillararenes can be tuned by structural modifications.
• The pillar-shaped architecture facilitates the construction of diverse supramolecular systems.