Metal-organic frameworks as advanced platforms for radionuclide detection.

Area of Science:

• Materials Science
• Environmental Science
• Analytical Chemistry

Background:

• Nuclear energy development has increased artificial radionuclides, posing health and environmental risks.
• Radionuclides exist in diverse chemical forms (gaseous, ionic, molecular), necessitating precise detection and separation.
• Effective monitoring is crucial for mitigating hazards associated with radioactive materials.

Purpose of the Study:

• To review the application of metal-organic frameworks (MOFs) for radionuclide detection.
• To systematically organize MOF-based detection strategies based on radionuclide chemical forms (gaseous, cationic, anionic).
• To examine various MOF detection mechanisms and their principles, implementations, and limitations.

Main Methods:

• Exploration of MOFs' structural tunability and functional versatility for radionuclide sensing.
• Categorization of detection methods based on radionuclide speciation (gaseous, cationic, anionic).
• Analysis of key detection mechanisms: fluorescence sensing (quenching, enhancement, fluorochromism), scintillation, colorimetric, and electrochemical sensing.

Main Results:

• MOFs demonstrate significant potential for selective and sensitive radionuclide detection.
• Various MOF-based sensing strategies are effective for different radionuclide forms and chemical species.
• Different detection mechanisms offer unique advantages and limitations for specific applications.

Conclusions:

• MOFs represent a promising class of materials for advanced radionuclide detection and monitoring.
• Tailoring MOF structures and functionalities enables targeted sensing of diverse radioactive species.
• Further research into MOF-based systems can enhance environmental safety and nuclear security.