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Entropy-mediated solidification stabilizes and enhances energetic release in amorphous energetic materials.

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Researchers created a stable amorphous energetic material, AEM-DATNBI, from DATNBI. This breakthrough enhances safety and energy release in rigid organic molecules without additives.

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Area of Science:

  • Materials Science
  • Chemical Engineering
  • Crystallography

Background:

  • Stable amorphous phases in rigid organic small molecules are difficult to achieve due to high crystallization tendencies.
  • Stabilizing amorphous energetic materials without inert additives is crucial for maintaining high energy density and safety.

Purpose of the Study:

  • To overcome the challenge of forming stable amorphous energetic materials from rigid organic small molecules.
  • To develop a method for stabilizing amorphous energetic materials without compromising energy density.

Main Methods:

  • Melt quenching process to prepare amorphous DATNBI (AEM-DATNBI).
  • Characterization of the glass transition temperature and structural stability of AEM-DATNBI.
  • Analysis of the molecular interactions contributing to amorphous phase stability.

Main Results:

  • Successfully realized a stable amorphous energetic material, AEM-DATNBI, from the small molecule explosive DATNBI.
  • AEM-DATNBI exhibits a glass transition temperature of 59.67°C and remains stable for over 24 hours at 60°C.
  • Stability is attributed to synergistic interactions between the non-planar molecular framework and a 3D hydrogen-bond network.

Conclusions:

  • The developed amorphous structure enhances safety by suppressing hotspot formation and accelerates energy release.
  • This study presents a general strategy using steric hindrance and intermolecular interactions to create amorphous energetic materials.
  • The findings extend the applicability of amorphous materials to energetic compounds and other functional rigid organic small molecules.