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Updated: May 29, 2026

Preparation of Stable Bicyclic Aziridinium Ions and Their Ring-Opening for the Synthesis of Azaheterocycles
Published on: August 22, 2018
Comparative theoretical studies of energetic azo s-triazines
Fang Wang1, Hong-chen Du, Jian-ying Zhang
1Department of Chemistry, Nanjing University of Science and Technology , Nanjing 210094, People's Republic of China.
This study theoretically investigated high-nitrogen compounds, finding that bridged triazines with specific functional groups offer superior detonation performance and thermal stability compared to traditional energetic materials like RDX and HMX.
Area of Science:
- Computational chemistry
- Materials science
- Energetic materials
Background:
- High-nitrogen compounds are crucial for developing advanced energetic materials.
- Understanding structure-property relationships is key to designing novel high-energy density materials (HEDMs).
Purpose of the Study:
- To theoretically evaluate the properties of synthesized high-nitrogen compounds, 4,4',6,6'-tetra(azido)azo-1,3,5-triazine (TAAT) and 4,4',6,6'-tetra(azido)hydrazo-1,3,5-triazine (TAHT).
- To investigate designed bridged triazines for potential applications as HEDMs.
- To assess detonation performance and thermal stability of novel triazine derivatives.
Main Methods:
- Density Functional Theory (DFT) with the B3LYP/AUG-cc-PVDZ method for gas-phase heats of formation.
- Isodesmic reactions for enthalpy predictions.
- Politzer approach for condensed-phase heats of formation and sublimation.
- Molecular packing calculations for crystal density.
- Analysis of bond dissociation energies.
Main Results:
- TAAT and TAHT exhibit inferior detonation performance.
- Electron-withdrawing groups like -NF(2) and -NO(2) enhance detonation performance.
- Bridged triazines demonstrate good thermal stability, surpassing RDX and HMX.
- -NH-NH- bridges improve stability more than -N═N(O)- and -N═N- bridges.
- Three designed bridged triazines show potential as HEDMs.
Conclusions:
- The synthesized TAAT and TAHT are not ideal energetic materials.
- Specific structural modifications, including functional groups and bridges, can significantly enhance detonation performance and thermal stability.
- Several designed bridged triazines are promising candidates for future high-energy density materials research.
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