Metal-Organic Framework (MOF) Morphology Control by Design

Area of Science:

• Materials Science
• Crystallography
• Chemical Engineering

Background:

• Morphological control of metal-organic frameworks (MOFs) is crucial for optimizing their performance in diverse applications, including catalysis, separations, and gas storage.
• Tailoring crystal morphology influences packing behavior and overall material efficiency.

Purpose of the Study:

• To introduce and experimentally validate a mechanism-based approach for controlling the morphology of metal-organic frameworks (MOFs).
• To demonstrate the application of this methodology on five cubic Zn4O-based MOFs.

Main Methods:

• Computational screening of additives based on crystal structure information to predict morphological changes.
• Utilizing the geometric relationship between additives and metal clusters to direct crystal growth towards desired crystallographic facets.
• Investigating the potential of the method to suppress interpenetration in specific MOF phases.

Main Results:

• Successfully demonstrated a mechanism-based approach for morphological control in five cubic Zn4O-based MOFs.
• Identified appropriate additives through computational screening to influence crystal morphology.
• Achieved targeted crystal morphologies expressing specific crystallographic facets.

Conclusions:

• The presented methodology offers a rational approach to tailor MOF morphology for enhanced performance.
• This method provides a pathway to optimize MOF properties for specific applications like catalysis and gas storage.
• The approach shows potential for controlling interpenetration, a common challenge in MOF synthesis.