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Updated: Sep 9, 2025
08:12
Surface Functionalization of Metal-Organic Frameworks for Improved Moisture Resistance
Published on: September 5, 2018
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Tuning Intercrystal Interactions between Metal-Organic Frameworks through Water Adsorption
Jiahui Chen1, Enting Xu1, Yinfei Xie1
1School of Science, Harbin Institute of Technology, Shenzhen 518055, P. R. China.
Nano Letters
|August 29, 2025
Summary
Water significantly enhances the adhesion energy of metal-organic frameworks (MOFs), like HKUST-1. This discovery offers a new way to control how MOF powders pack for various applications.
Area of Science:
- Materials Science
- Surface Chemistry
- Nanotechnology
Background:
- Powdered metal-organic frameworks (MOFs) require controlled packing for practical applications.
- Intercrystal interactions are crucial for the performance of packed MOF materials.
Purpose of the Study:
- To quantify the effect of water adsorption on the intercrystal adhesion energy of MOF HKUST-1.
- To explore the mechanisms behind water-induced changes in MOF intercrystal interactions.
- To investigate the potential for tuning MOF packing properties through water adsorption.
Main Methods:
- Atomic force microscopy (AFM) using a MOF HKUST-1 crystallite-tipped probe.
- Molecular dynamics (MD) simulations to model intercrystal adhesion.
- Discrete-element-method (DEM) simulations to analyze packing properties.
Main Results:
- As-synthesized HKUST-1 with adsorbed water showed quadruple the intercrystal adhesion energy compared to its activated form.
- MD simulations confirmed a significant enhancement in intercrystal adhesion energy due to water adsorption.
- Water adsorption facilitates the formation of strong hydrogen-bond networks involving copper paddlewheels and surface-adsorbed water molecules.
Conclusions:
- Water adsorption dramatically increases the intercrystal adhesion energy of MOF HKUST-1.
- The findings provide a fundamental understanding of water's role in MOF intercrystal surface properties.
- Water adsorption presents a novel and tunable strategy for manipulating MOF packing properties for advanced applications.
Keywords:
atomic force microscopehydrogen-bond networksintercrystal interactionsmetal−organic frameworksmolecular dynamics simulationsMore Related Videos
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