Zwitterionic fused pyrazolo-triazole based high performing energetic materials.

Area of Science:

• Materials Science
• Organic Chemistry
• Chemical Engineering

Background:

• Energetic materials are crucial for various applications.
• Development of novel energetic materials with enhanced performance and safety is an ongoing research area.
• Nitrogen-rich compounds are of particular interest due to their high heats of formation and combustion products.

Purpose of the Study:

• To synthesize and characterize a series of novel nitrogen-rich fused energetic materials.
• To evaluate the detonation performance, sensitivity, and thermal stability of the synthesized compounds.
• To explore the potential of these materials as next-generation energetic compounds.

Main Methods:

• Synthesis of nitrogen-rich fused energetic materials from inexpensive starting materials.
• Full characterization using 1H and 13C NMR, IR spectroscopy, and elemental analysis.
• Structural elucidation of zwitterionic compound 2 via single-crystal X-ray diffraction (SCXRD).
• Thermal analysis using Differential Scanning Calorimetry (DSC).
• Evaluation of detonation velocity, friction sensitivity, and impact sensitivity.

Main Results:

• Successful synthesis of several nitrogen-rich fused energetic materials.
• Compounds 3 and 4 exhibited excellent detonation velocities (8956 and 9163 m/s).
• These compounds demonstrated high insensitivity to friction (>360 N) and impact (10 J).
• Moderate to excellent thermal stability was observed for compounds 3 and 4 (171-262 °C).
• Zwitterionic fused pyrazolo-triazole compound 2 and its energetic salts showed remarkable performance.

Conclusions:

• The synthesized nitrogen-rich fused energetic materials offer a promising combination of high performance and safety.
• Compound 2 and its energetic salts represent a new class of thermally stable energetic materials.
• These findings contribute to the development of advanced energetic materials for future applications.