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A Non-Equilibrium Flame Aerosol Process to Create High-Entropy MOFs
Shuo Liu1,2, Jiashun Liang1, Mohd Ashhar Khan1
1Department of Chemical and Biological Engineering, University At Buffalo, The State University of New York, Buffalo, New York, USA.
A novel flame aerosol method synthesizes high-entropy metal-organic frameworks (MOFs), overcoming limitations of traditional methods. This expands MOF composition and properties for new applications.
Area of Science:
- Materials Science
- Chemistry
Background:
- High-entropy alloys and ceramics show promise due to expanded compositional space via ultrafast processing.
- Traditional non-equilibrium methods require extreme temperatures incompatible with metal-organic frameworks (MOFs).
Purpose of the Study:
- To develop a new synthesis strategy for compositionally complex, entropically stabilized MOFs.
- To expand the accessible property combinations in MOFs.
Main Methods:
- Flame aerosol synthesis.
- Utilized the HKUST structure as a prototype.
- Extended methodology to various crystalline and amorphous MOFs, including a 10-element MOF and inorganic coordination polymers.
Main Results:
- Successfully synthesized compositionally complex, entropically stabilized MOFs using flame aerosol.
- Demonstrated the synthesis of a 10-element MOF incorporating diverse metal types.
- Revealed that kinetics and entropy influence framework structure, crystallinity, pore architecture, defect density, homogeneity, and electrochemical properties.
Conclusions:
- Flame aerosol synthesis offers a viable route for creating novel high-entropy MOFs.
- This strategy significantly expands the compositional design space for MOFs.
- Opens new avenues for fundamental research and practical applications of advanced MOFs.
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