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Surface Functionalization of Metal-Organic Frameworks for Improved Moisture Resistance

Surface Functionalization of Metal-Organic Frameworks for Improved Moisture Resistance

Published on: September 5, 2018

Salt-templated mesoporous solids comprised of interlinked polyoxovanadate clusters.

Wendy L Queen¹, Shiou-Jyh Hwu, Shane Reighard

¹Department of Chemistry, Clemson University, Clemson, South Carolina 29634-0973, USA.

Inorganic Chemistry

|January 14, 2010

Summary

Researchers synthesized novel porous vanadium arsenate frameworks using molten salts. These materials, featuring polyoxovanadate units, show potential for applications after salt removal and redox treatments.

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Synthesis and Characterization of Functionalized Metal-organic Frameworks

Synthesis and Characterization of Functionalized Metal-organic Frameworks

Published on: September 5, 2014

Area of Science:

Materials Science
Inorganic Chemistry
Nanotechnology

Background:

Molten salts are effective media for synthesizing advanced materials.
Polyoxovanadate (POV) compounds offer unique structural and chemical properties.
Developing porous inorganic solids is crucial for catalysis and separation technologies.

Purpose of the Study:

To synthesize and characterize a new family of mesoporous salt-inclusion solids.
To investigate the structural features and porosity of vanadium arsenate frameworks.
To explore the impact of salt removal and redox chemistry on material properties.

Main Methods:

High-temperature synthesis utilizing molten salts.
X-ray diffraction and surface area measurements for structural and porosity analysis.
Chemical treatments for salt removal and assessment of redox-induced changes.

Main Results:

Successful synthesis of mesoporous vanadium arsenate frameworks containing [V(4)O(16)] and [V(5)O(17)] polyoxovanadate units.
Frameworks exhibit significant porosity with approximately 2-nm-diameter pores and voids up to 7.2% of unit cell volume.
Surface area measurements confirmed porosity (90-110 m(2)/g) and showed substantial increases (35-70%) after salt removal.

Conclusions:

Molten salt synthesis is a viable route to novel porous polyoxovanadate materials.
The resulting vanadium arsenate frameworks possess tunable porosity suitable for further functionalization.
Salt removal and redox chemistry can significantly enhance the surface area and potential utility of these materials.