What question did this study set out to answer?

The aim is to synthesize and evaluate new bridged 1,3,4-oxadiazole compounds to enhance energetic performance.

February 21, 2026Crystal Growth & Design0 citations

Redefining 1,3,4-Oxadiazoles: Bridged Architectures for Balanced Energetic Performance

PKParasar KumarIndian Institute of Technology Kanpur TGTrishala GiriIndian Institute of Technology Kanpur VGVikas D. GhuleNational Institute of Technology Kurukshetra

Puntos clave

The aim is to synthesize and evaluate new bridged 1,3,4-oxadiazole compounds to enhance energetic performance.
Synthesis of methylene- and nitroso-bridged 1,3,4-oxadiazoles through scalable methods.
Characterization using NMR spectroscopy, IR spectroscopy, elemental analysis, and mass spectrometry.
Thermal properties evaluated using thermogravimetric analysis and differential scanning calorimetry.
Molecular structures confirmed by single-crystal X-ray diffraction.
Compound 3 demonstrated high thermally stable properties, with significant mechanical insensitivity.
Achieved high detonation metrics: VOD of 7712 m s–1 and detonation pressure of 23.78 GPa.
Outperformed traditional explosives like TNT and HNS in energetic performance metrics.

Resumen

Methylene- and nitroso-bridged 1,3,4-oxadiazole-based energetic compounds have been synthesized through efficient and scalable synthetic methodologies. These bridged compounds exhibit high synthetic yields and enhanced energetic characteristics. Comprehensive structural elucidation and purity verification were performed by using multinuclear NMR (1H, 13C, 15N) spectroscopy, infrared (IR) spectroscopy, elemental analysis (EA), high-resolution mass spectrometry (HRMS), thermogravimetric analysis, and differential scanning calorimetry (TGA-DSC) studies. The molecular and crystal structures of compounds 2 and 4 were further confirmed by single-crystal X-ray diffraction analysis. Compound 3 emerged as a promising thermally stable secondary explosive, showing mechanical insensitivity (IS = 40 J, FS = 360 N) and high detonation metrics (VOD = 7712 m s–1; DP = 23.78 GPa), outperforming TNT and HNS. These results highlight the potential nature of this bridged oxadiazole motif for next-generation secondary explosives that balance sensitivity, thermal stability, and performance.

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