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Silver(I)-Based Molecular Perovskite Energetic Compounds with Exceptional Thermal Stability and Energetic Performance
Yu Shang1,2, Shao-Li Chen1,2, Zhi-Hong Yu2
1Xi'an Modern Chemistry Research Institute, Xi'an 710065, China.
Inorganic Chemistry
|February 22, 2022
Summary
New silver(I)-based molecular perovskites show promise as heat-resistant explosives. Compounds PAP-5 and DAP-5 exhibit high thermal stability and excellent detonation performance with low mechanical sensitivity.
Area of Science:
- Materials Science
- Chemistry
- Energetic Materials
Background:
- Molecular perovskite energetic materials are gaining attention due to their ease of synthesis, thermal stability, and performance.
- Their potential application in heat-resistant explosives necessitates further investigation.
- Silver(I)-based compounds offer a promising platform for designing novel energetic materials.
Purpose of the Study:
- To synthesize and characterize novel silver(I)-based molecular perovskite energetic compounds.
- To evaluate their potential for application as heat-resistant explosives.
- To explore structure-property relationships in these materials.
Main Methods:
- One-pot self-assembly strategy for synthesis of four silver(I)-based molecular perovskite energetic compounds.
- Structural characterization using single-crystal X-ray diffraction.
- Thermal stability assessment via differential thermal analysis (DTA).
- Calculation of detonation parameters (D and P) and measurement of mechanical sensitivity (impact and friction).
Main Results:
- Four compounds were synthesized: PAP-5, PAP-M5, PAP-H5, and DAP-5.
- PAP-5, PAP-M5, and DAP-5 exhibited cubic perovskite structures; PAP-H5 showed a hexagonal perovskite structure.
- All compounds demonstrated high thermal stability with onset decomposition temperatures exceeding 308.3 °C.
- PAP-5 and DAP-5 displayed exceptional calculated detonation parameters (D: 8.961-8.534 km s⁻¹, P: 42.4-37.9 GPa).
- PAP-5 and DAP-5 showed low mechanical sensitivity (impact ≤10 J, friction ≤5 N).
Conclusions:
- The synthesized silver(I)-based molecular perovskites possess high thermal stability and promising energetic properties.
- PAP-5 and DAP-5 are identified as potential candidates for heat-resistant primary explosive components due to their balanced performance and safety characteristics.
- This study highlights the potential of molecular perovskites as a versatile platform for designing advanced energetic materials.
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