Hierarchy in Metal-Organic Frameworks.

Area of Science:

• Materials Science
• Chemistry

Background:

• Natural hierarchical systems like nucleic acids and proteins exhibit complex functions.
• These natural structures inspire the creation of artificial hierarchical materials for replication, recognition, and information storage.

Purpose of the Study:

• To introduce the concept of hierarchy in the design of metal-organic frameworks (MOFs).
• To discuss strategies for synthesizing and assembling MOFs with hierarchical architectures.
• To highlight the potential of these materials for future smart applications.

Main Methods:

• Reviewing the history and background of hierarchical MOF synthesis and applications.
• Describing mesoscopic assembly strategies for MOF crystallites into multi-level architectures.
• Highlighting modular total synthesis for creating MOFs with hierarchical compositions.

Main Results:

• Demonstrating multiscale control over hierarchical MOF architecture formation.
• Achieving rational design through stepwise synthetic routes.
• Integrating knowledge from coordination chemistry, organic chemistry, reticular chemistry, and nanoscience.

Conclusions:

• Hierarchical MOFs are essential but embryonic materials.
• Controllable heterogeneity and tailorable architectures are key features.
• These materials offer inspiration for the next generation of smart MOF materials.