Chemical Sensors Based on Metal-Organic Frameworks

Area of Science:

• Materials Science
• Chemistry
• Sensor Technology

Background:

• Metal-organic frameworks (MOFs) are increasingly recognized for their potential in chemical sensing applications.
• Their unique structures facilitate energy and charge transfer mechanisms, enhancing sensor performance.
• Growing research interest underscores the expanding utility of MOFs in this domain.

Purpose of the Study:

• To provide an updated review of recent advancements in MOF-based chemical sensors.
• To explore diverse applications of MOFs in detecting various analytes.
• To summarize the sensing mechanisms based on luminescent and electrochemical responses.

Main Methods:

• Reviewing literature on MOF-based sensors.
• Analyzing MOF properties related to energy/charge transfer.
• Categorizing sensors based on detected analytes and response mechanisms.

Main Results:

• MOFs demonstrate enhanced sensitivity and selectivity due to internal energy/charge transfers.
• MOF sensors effectively detect small molecules, gases, ions, pH, humidity, temperature, and biomolecules.
• Sensing mechanisms include "turn-on"/"turn-off" luminescence and electrochemical signal changes.

Conclusions:

• MOF-based sensors represent a rapidly developing field with significant potential.
• The tunable properties of MOFs allow for tailored sensor design.
• Luminescent and electrochemical MOF sensors offer versatile platforms for diverse analytical challenges.