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Endowing Energetic Coordination Compounds with Laser-Specific Sensitivity via Nitro-Functionalization.

Bin-Shan Zhao1, Chao Zhang1, Zu-Jia Lu1

  • 1State Key Laboratory of Explosion Science and Safety Protection, Beijing Institute of Technology, Beijing 100081, P. R. China.

Inorganic Chemistry
|May 16, 2026
PubMed
Summary
This summary is machine-generated.

Nitro-functionalization of energetic coordination compounds (ECCs) enhances laser sensitivity while improving mechanical safety. This breakthrough offers a new strategy for developing safer, high-performance laser-ignitable energetic materials.

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Area of Science:

  • Materials Science
  • Chemistry
  • Energetic Materials

Background:

  • Developing laser-ignitable energetic materials requires balancing high laser sensitivity with mechanical safety.
  • Existing materials often compromise one property for the other, posing significant challenges.

Purpose of the Study:

  • To synthesize and characterize novel nitro-substituted energetic coordination compounds (ECCs).
  • To investigate the effect of nitro-functionalization on both laser and mechanical sensitivity.
  • To elucidate the underlying mechanisms responsible for enhanced laser sensitivity and reduced mechanical sensitivity.

Main Methods:

  • Synthesis and characterization of five novel nitro-substituted ECCs.
  • Structural analysis including crystal density and thermal stability assessment.
  • Computational analysis: Noncovalent Interaction (NCI), Hirshfeld surface, electrostatic potential, and frontier molecular orbital analysis.

Main Results:

  • Nitro-functionalization significantly increased crystal density and thermal stability of ECCs.
  • The nitro group was found to modulate electronic structure for laser initiation.
  • Strengthened intermolecular interactions due to nitro groups buffered mechanical stimuli, reducing sensitivity.

Conclusions:

  • Nitro-functionalization is an effective strategy for simultaneously enhancing laser sensitivity and mechanical safety in ECCs.
  • The dual role of the nitro group (electronic modulation and network strengthening) is key to achieving 'laser-specific sensitivity'.
  • This research presents a novel paradigm for designing advanced, safer laser-sensitive explosives.