Supramolecular and molecular capsules, cages and containers

Area of Science:

• Supramolecular Chemistry
• Materials Science
• Organic Chemistry

Background:

• Molecular recognition and encapsulation principles have driven interest in 3D cavity-containing compounds.
• Confined environments within these structures alter chemical and physical properties compared to bulk phases.
• Diverse covalent and non-covalent interactions enable a wide range of capsular architectures.

Purpose of the Study:

• To provide an overview of design principles, synthesis, characterization, and properties of various capsular systems.
• To explore the advantages and limitations of different molecular architectures.
• To highlight applications in sensing, sequestration, catalysis, and molecular transport.

Main Methods:

• Review of design strategies for creating 3D molecular capsules.
• Examination of synthetic approaches for assembly of capsular structures.
• Analysis of characterization techniques and structural features.
• Exploration of structure-property relationships.

Main Results:

• Development of diverse capsular architectures including coordination cages, porous organic cages, supramolecular capsules, foldamers, and mechanically interlocked molecules.
• Demonstration of synthetic tunability for engineering internal environments.
• Highlighting of specific examples showcasing advantages and limitations.

Conclusions:

• Capsular compounds offer significant potential for modulating molecular properties within confined spaces.
• Engineered systems show promise for advanced applications in chemical sensing, sequestration, catalysis, and transport.
• Continued exploration of these architectures will drive innovation in molecular engineering.