Research Progress on Metal-Organic Frameworks by Advanced Transmission Electron Microscopy

Area of Science:

• Materials Science
• Nanotechnology
• Chemistry

Background:

• Metal-organic frameworks (MOFs) possess unique periodic structures beneficial for diverse applications.
• Understanding MOF structure-activity relationships is key to developing novel materials.
• Transmission electron microscopy (TEM) offers atomic-scale insights into MOF microstructures.

Purpose of the Study:

• To review advanced TEM techniques for MOF characterization.
• To discuss strategies for mitigating electron beam-induced damage in MOFs.
• To highlight in situ TEM applications for studying MOF dynamics.

Main Methods:

• Low-dose TEM and cryo-TEM to minimize radiation damage.
• Three-dimensional electron diffraction for structural analysis.
• Direct-detection electron-counting cameras and iDPC-STEM for high-resolution imaging.

Main Results:

• Demonstration of advanced TEM techniques for atomic-scale MOF microstructure analysis.
• Insights into MOF microstructural evolution under working conditions via in situ TEM.
• Identification of key research advances and milestones in MOF structural studies.

Conclusions:

• Advanced TEM is crucial for understanding MOF structure-property correlations.
• In situ TEM provides dynamic insights into MOF behavior under various stimuli.
• Future perspectives for TEM in MOF research are promising.