Luminescence-based methods for sensing and detection of explosives

Area of Science:

• Analytical Chemistry
• Forensic Science
• Environmental Science

Background:

• Explosive detection is crucial for forensic and environmental safety.
• Luminescence-based techniques are effective for detecting explosives in complex samples.

Purpose of the Study:

• To review direct and indirect luminescence-based methods for explosive detection.
• To highlight techniques utilizing fluorescence and luminescence for explosive analysis.

Main Methods:

• Direct detection: exploiting inherent fluorescence or reaction-generated luminescence (e.g., X-ray fluorescence, chemiluminescence).
• Indirect detection: utilizing fluorescence quenching or displacement by explosive compounds (e.g., solution-phase, immobilized, solid-state fluorophores).
• Review of various analytical approaches including fluorescence immunoassay and chemical reactions producing fluorescent products.

Main Results:

• Both direct and indirect luminescence methods show promise for sensitive explosive detection.
• Diverse techniques exist, ranging from high-energy excitation to fluorescence quenching assays.
• The choice of method depends on the matrix and specific explosive compounds.

Conclusions:

• Luminescence-based detection is a versatile tool for identifying explosives and their byproducts.
• A comprehensive understanding of these methods is vital for forensic and environmental applications.
• Further research can optimize sensitivity and selectivity for real-world scenarios.