Constructing Inter-ring Hydrogen Bonds for High-Performance Energetic Compounds

Area of Science:

• Energetic Materials Science
• Organic Chemistry
• Materials Engineering

Background:

• Achieving high energy density and stability is crucial for energetic materials.
• Resonance-assisted hydrogen bonds (RAHB) offer a promising strategy for stabilizing molecules.
• Bicyclic compounds are of interest due to their structural properties.

Purpose of the Study:

• To synthesize a novel bicyclic energetic material incorporating an inter-ring RAHB.
• To evaluate the energy performance (detonation velocity and pressure) of the synthesized compound.
• To assess the mechanical sensitivity of the new energetic material.

Main Methods:

• Synthesis of bicyclic compound 5 through targeted molecular design.
• Engineering an inter-ring resonance-assisted hydrogen bond within the bridged skeleton.
• Measurement of detonation velocity and pressure using standard techniques.
• Assessment of impact sensitivity (IS) and friction sensitivity (FS).

Main Results:

• Successful synthesis of compound 5 featuring an inter-ring RAHB.
• Achieved a high detonation velocity of 9096 m/s.
• Recorded a detonation pressure of 36.3 GPa.
• Exhibited low mechanical sensitivity with IS = 35 J and FS = 288 N.

Conclusions:

• The engineered inter-ring RAHB effectively enhances the stability of the bicyclic energetic material.
• Compound 5 demonstrates a favorable balance of high energy output and low sensitivity.
• This study presents a viable approach for designing safer, high-performance energetic materials.