Polynitrogen High Energy Density Materials Synthesized by Nonequilibrium Plasma
Polynitrogen High Energy Density Materials Synthesized by Nonequilibrium Plasma
复制标题
DOI：
10.1021/acs.jpcc.3c00582
复制
发表时间：
2023-04
期刊：
影响因子：
--
通讯作者：
E. Thimsen
中科院分区：
文献类型：
--
作者：
E. Thimsen
从热力学角度来看，含有5-氮单电荷阴离子环的金属五唑化合物是一类有趣的材料。这些化合物被认为只有在极高的压力下才是平衡相，因此，它们在环境压力和温度下构成物质的奇异状态。此外，这些五唑化合物在环境条件下弛豫至平衡状态时释放的能量在1至10 MJ/kg的范围内，与燃烧反应的能量相当。五唑类化合物的合成并不是一件容易的事情，已知的方法只有两种，每种方法都有很大的挑战。开发新的可扩展的合成路线可以使这些外来材料的生产足够的数量，以更广泛地探索其性能，超越爆炸物和推进剂的范围。在这方面，有人认为，非平衡等离子体是一个有前途的反应介质，用于合成金属五唑化合物，例如从相应的金属叠氮化物和N2气体激活的放电在低背景温度下。
Metal pentazolate compounds that contain 5-nitrogen singly charged anion rings are an interesting class of materials from a thermodynamics perspective. These compounds are believed to be equilibrium phases only at extremely high pressures, and thus, they constitute exotic states of matter at ambient pressure and temperature. Moreover, the energy released by these pentazolate compounds upon relaxation to the equilibrium state at ambient conditions is in the range 1 to 10 MJ per kg, rivaling that of combustion reactions. The synthesis of pentazolates is not an easy task, and there are only two known methods, each of which has significant challenges. The development of new scalable synthesis routes could enable the production of these exotic materials in sufficient quantity to explore their properties more widely beyond the context of explosives and propellants. In this Perspective, it is argued that nonequilibrium plasma is a promising reaction medium for the synthesis of metal pentazolate compounds, for example from the corresponding metal azide and N2gas activated by the discharge at low background temperature.