Enhancing Conjugation Effect to Develop Nitrogen-Rich Energetic Materials with Higher Energy and Stability

Area of Science:

• Energetic Materials Science
• Organic Synthesis
• Computational Chemistry

Background:

• High-nitrogen compounds are crucial for advanced energetic materials.
• Balancing energy output and stability remains a key challenge in this field.
• Existing polycyclic tetrazoles often face limitations in performance or safety.

Purpose of the Study:

• To synthesize a novel symmetrical and planar high-nitrogen compound with enhanced energetic properties.
• To investigate the synergistic effects of incorporating azo and 1,2,3-triazole moieties.
• To achieve a balance between high energy density and thermal stability in energetic materials.

Main Methods:

• Synthesis of 1,2-bis(4,5-di(1H-tetrazol-5-yl)-2H-1,2,3-triazol-2-yl)diazene (NL24) through a strategy enhancing conjugation.
• Characterization of NL24's thermal stability (T_d: 263 °C, IS: 7 J).
• Evaluation of detonation performance, including heat of formation (ΔH_f: 6.06 kJ g⁻¹) and detonation velocity (V_D: 9002 m s⁻¹).

Main Results:

• A novel symmetrical and planar compound, NL24, was successfully synthesized.
• The synergistic effect of azo and triazole groups significantly enhanced conjugation and stability.
• NL24 demonstrated excellent detonation performance with high nitrogen content (24 atoms).

Conclusions:

• The developed strategy successfully balances energy and stability in polycyclic tetrazole derivatives.
• NL24 represents a significant advancement in high-performance energetic materials.
• This work provides a new direction for the design of next-generation energetic materials.