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Author Spotlight: Accelerating Discovery in Microporous Material Chemistry

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Structure of metal-organic framework nanocrystals obtained from electron diffraction data by iterative phase

Tatiana E Gorelik¹, Tatiana Latychevskaia², Irena Senkovska³

¹Ernst Ruska-Centre for Microscopy and Spectroscopy with Electrons, Forschungszentrum Jülich GmbH, Jülich 52428, Germany; Ulm University, Central Facility of Electron Microscopy, Materials Science Electron Microscopy, Albert Einstein Allee 11, Ulm 89069, Germany.

Micron (Oxford, England : 1993)

|November 26, 2025

Summary

Iterative phase retrieval of metal-organic framework (MOF) nanocrystals revealed structural disorder and crystal shape. This electron diffraction method offers new insights into MOF structure and morphology.

Keywords:

Coherent diffraction Imaging Electron diffraction Iterative phase retrieval Metal-organic framework Nanocrystals

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Area of Science:

Materials Science
Crystallography
Nanotechnology

Background:

Metal-organic frameworks (MOFs) are porous materials with tunable structures.
Understanding the precise atomic arrangement and morphology of MOF nanocrystals is crucial for their applications.
Electron diffraction is a powerful technique for probing crystal structures at the nanoscale.

Purpose of the Study:

To demonstrate iterative phase retrieval for reconstructing the structure of DUT-8(Ni) MOF nanocrystals.
To correlate reconstructed structural features with known crystal disorder.
To determine the crystal shape of MOF nanocrystals using electron diffraction data.

Main Methods:

High-resolution electron diffraction data acquisition from DUT-8(Ni) MOF nanocrystals.
Iterative phase retrieval algorithms applied to electron diffraction datasets.
Analysis of reconstructed images for structural features and crystal morphology.

Main Results:

Reconstructed images revealed well-resolved metal-containing rows with shifts indicating crystal structure disorder.
Electron diffraction patterns showed modulations consistent with a rectangular crystal shape.
Successfully reconstructed crystal shape images matched the observed morphology.

Conclusions:

Iterative phase retrieval is effective for elucidating the structure and morphology of MOF nanocrystals.
The method can identify and characterize crystal structure disorder.
This technique provides a pathway for detailed structural and morphological analysis of nanomaterials.