Aliovalent solid solutions of metal-organic frameworks.
1Department of Chemistry and Industrial Chemistry, INSTM Research Unit, University of Pisa, Via G. Moruzzi 13, 56124, Pisa, Italy. marco.taddei@unipi.it.
Dalton Transactions (Cambridge, England : 2003)
|February 3, 2026
Summary
Aliovalent substitution in metal-organic frameworks (MOFs) creates charge imbalances that can yield novel properties. This review analyzes aliovalent MOF solid solutions, highlighting their potential for tuning MOF characteristics.
Area of Science:
- Materials Science
- Inorganic Chemistry
- Crystallography
Background:
- Metal-organic frameworks (MOFs) can form solid solutions via isomorphous substitution of organic linkers or metal ions.
- Aliovalent substitution involves incorporating ions with different oxidation states, introducing charge defects into the MOF framework.
Purpose of the Study:
- To critically analyze existing literature on aliovalent solid solutions in MOFs.
- To explore the potential of aliovalent substitution as a method for fine-tuning MOF properties.
- To examine charge compensation mechanisms and their impact on MOF characteristics.
Main Methods:
- Literature review and critical analysis.
- Examination of inorganic solid-state chemistry principles applied to MOFs.
- Analysis of aliovalent substitution strategies and their consequences.
Main Results:
- Aliovalent substitution in MOFs generates excess charges requiring compensation.
- Charge compensation mechanisms can lead to the emergence of new MOF properties.
- Systematic investigation of aliovalent MOF solid solutions is currently limited but promising.
Conclusions:
- Aliovalent substitution is a potentially powerful tool for tailoring MOF physico-chemical properties.
- Further systematic research is needed to fully understand and exploit aliovalent MOF solid solutions.
- This approach offers a pathway to novel functional materials through controlled defect engineering.
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