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Fluorescence based explosive detection: from mechanisms to sensory materials.

Xiangcheng Sun1, Ying Wang, Yu Lei

  • 1Department of Chemical and Biomolecular Engineering, University of Connecticut, 191 Auditorium Road, Unit 3222, Storrs, CT 06269, USA. ylei@engr.uconn.edu xiangcheng.sun@uconn.edu.

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This review details advanced fluorescent materials for sensitive and selective explosive detection. It covers recent progress in sensing mechanisms and material types for enhanced global security applications.

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Area of Science:

  • Materials Science
  • Analytical Chemistry
  • Security Technology

Background:

  • Explosives detection is critical for global security.
  • Fluorescence-based sensing offers sensitive detection methods.
  • Recent advancements focus on super-sensitivity and ultra-selectivity.

Purpose of the Study:

  • To review the state-of-the-art fluorescent materials for explosive detection.
  • To summarize sensing mechanisms and performance of novel materials.
  • To highlight research trends in the last five years.

Main Methods:

  • Systematic review of recent literature (last 5 years).
  • Analysis of various fluorescent material types (polymers, small molecules, supramolecular, bio-inspired, AIE-active).
  • Evaluation of sensing mechanisms and performance metrics.

Main Results:

  • Overview of diverse fluorescent materials and their applications in explosive detection.
  • Detailed discussion of sensing mechanisms including fluorescence quenching, enhancement, and aggregation-induced emission.
  • Highlighting materials achieving high sensitivity, selectivity, and rapid response times.

Conclusions:

  • Fluorescent materials are rapidly evolving for superior explosive detection.
  • Continued innovation in material design and sensing mechanisms is crucial.
  • Future research should focus on practical, real-world security applications.