关于N,N'-dinitroethylenediamine (EDNA) 的结构,多余能量,表面能量,电子结构,电荷和摩擦灵敏度之间的相关性的理论研究
Hong-Yan Li1, Yun-Dan Gan2, Fu-Sheng Liu1
1Bond and Band Engineering Group, School of Physical Science and Technology, Southwest Jiaotong University, Chengdu, 610031, People's Republic of China. bai@my.swjtu.edu.cn.
Physical chemistry chemical physics : PCCP
|October 6, 2023
概括
像EDNA这样的高能材料具有异型摩擦灵敏度. 研究人员发现,多余能量的计算准确地预测了不同EDNA晶体表面的摩擦灵敏度.
科学领域:
- 材料科学 材料科学 材料科学
- 计算化学的计算化学
- 化学工程是化学工程的重要组成部分.
背景情况:
- 能量材料具有异性敏度,这意味着它们的反应在不同的晶体方向上有所不同.
- 了解摩擦灵敏度对于安全处理和应用高能材料至关重要.
研究的目的:
- 为了研究EDNA (2,6-dinitro-2,6-diazatetracyclo[5.3.1.1(2,6).0(3,5)]多德的各种表面的异构摩擦灵敏度.
- 使用计算方法将表面特性与摩擦灵敏度相关联.
主要方法:
- 使用密度函数理论 (DFT) 的计算.
- 计算了多个EDNA表面的结构性,电子性和能量性质: (1 1 1), (1 1 0), (1 0 1), (0 1 1), (0 0 1), (0 1 0) 和 (1 0 0).
- 分析包括过剩的能量,表面能量,电子带间隙和基组电荷分布.
主要成果:
- EDNA 的 (0 0 1) 表面表现出最短的 N-N 债券长度,最高的 N-N 债券数量,最低的过量和表面能量,最大的带间隙和最大的基组电荷.
- 这些特性集体表明 (0 0 1) 表面具有最低的摩擦灵敏度.
- 过剩能量分析的结果与N-N键特性,带间隙和基组电荷相一致.
结论:
- 在研究的表面中,EDNA的 (0 0 1) 表面对摩擦最不敏感.
- 过剩的能量可以作为一个可靠的指标来评估不同EDNA表面的摩擦灵敏度.
- 计算方法,特别是DFT,是预测能量材料灵敏度的有效工具.
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