Abstract
AbstractBecause of its high energy, aromaticity, and carbon- and hydrogen-free structure, the cyclo-pentazolate anion (c-N5-) has attracted increased attention as a potential polynitrogen structural unit for the research of next-generation high energy density materials. However, the poor thermal stability of c-N5--based compounds has become an important factor restricting their development. Here, we show that a hydrogen-bonded organic framework (HOF) self-assembles with and stabilizes c-N5-, with c-N5- situated in the pores of the resulting framework through the formation of symmetrical c-N5- hydrogen bonds as the main stabilizing factors. These factors result in an onset decomposition temperature of 153 °C for the c-N5-@HOF portion, which exceeds the thermal stabilities generally observed for c-N5--based derivatives of below 135 °C. We envisage that further c-N5--based materials with enhanced stabilities and better performance will be developed in the future.
Funder
National Natural Science Foundation of China
Publisher
Springer Science and Business Media LLC
Reference54 articles.
1. Klapötke T. M. Chemistry of High-energy materials 4th edition, (Walter de Gruyter GmbH, Berlin/Boston, 2017).
2. Christe, K. O. Recent advances in the chemistry of N5+, N5− and high-oxygen compounds. Propell. Explos. Pyrotech. 32, 194–204 (2007).
3. Gozin M., Fershtat L. L. Nitrogen-rich energetic materials, (WILEY-VCH GmbH, Weinheim, Germany, 2023).
4. Singh, R. P., Verma, R. D., Meshri, D. T. & Shreeve, J. M. Energetic nitrogen-rich salts and ionic liquids. Angew. Chem., Int. Ed. 45, 3584–3601 (2006).
5. Zarko, V. E. Searching for ways to create energetic materials based on polynitrogen compounds (review). Combust. Explos. Shock Waves 46, 121–131 (2010).