Multilength Scale Hierarchy in Metal-Organic Frameworks: Synthesis, Characterization and the Impact on Applications

Evolutionary selection in nature has led to hierarchical structuring as a fundamental optimization strategy for biological structures, maximizing functional performance while minimizing resource usage. Precise hierarchical organization of natural materials over a wide range of length scales gives rise to unique synergistic properties that could not be achieved by single components. Despite the clear advantages offered by hierarchically structuring matter, mastering hierarchical control based on the current synthetic toolbox is still a challenge. In this review, some recent advancements in the fabrication of hierarchical metal organic framework (MOF) materials are highlighted and the advantages that arise due to different kinds of MOF hierarchy are critically analyzed. The special focus of the review lies in highlighting the applications where MOF hierarchical materials can be most impactful and describing characterization techniques currently at the disposal of scientists for the precise characterization of MOF hierarchical structures across all length scales. Finally, the intent is to inspire reticular chemists to master hierarchical control of MOF materials so as to fully utilize the advantages MOFs offer for various applications. Metal-organic frameworks (MOFs) are a unique platform for multilength scale hierarchical engineering for designing new materials with significantly enhanced properties. The concept of hierarchical MOF structuring serves as a fount of novel, complex materials for applications, such as catalysis, sensing, energy storage, separations, gas storage, water harvesting, and optics.image

Automated summary

Evolutionary selection in nature has led to hierarchical structuring as a fundamental optimization strategy for biological structures, maximizing functional performance while minimizing resource usage. Despite the advantages offered by hierarchically structuring matter, mastering hierarchical control based on the current synthetic toolbox is still a challenge.