关于CL-20/4,5-MDNI的能量共晶体的第一原则研究,在高压下具有两种不同的静电比率
Zikai Gao1, Zhihui Gu1, Mengjie Bao1
1College of Safety Science and Engineering, Nanjing Tech University, Nanjing, 210009, China.
Journal of molecular modeling
|February 25, 2025
概括
这项研究揭示了CL-20/4,5-MDNI共晶体中压力诱导的结构转变. 不同的固态比率在高水静压下表现出不同的转换和新的共价键形成.
科学领域:
- 材料科学 材料科学 材料科学
- 晶体学 晶体学是指结晶学.
- 计算化学计算化学
背景情况:
- 在高水立压下 (0-100 GPa) 调查CL-20/4,5-MDNI共晶.
- 检查了两个不同的固体几何比率 (1: 1 和 1: 3),以了解依赖压力的行为.
- 专注于晶体结构,电子,光学和机械性能.
研究的目的:
- 为了确定CL-20/4,5-MDNI共晶的结构,电子,光学和机械性能,在变化的水静压下.
- 分析不同固态度比对共晶稳定性和变化的影响.
- 进行希什菲尔德分析,以全面了解分子间相互作用.
主要方法:
- 使用材料工作室中的CASTEP模块进行第一原则计算.
- 使用密度函数理论 (DFT) 与BFGS优化技术进行几何精细化.
- 应用Perdew-Zunger局部密度近似 (LDA/CA-PZ) 函数,并将平面波切断能量设置为489 eV.
主要成果:
- 1:1的CL-20/4,5-MDNI共晶体在80和90GPa时显示了两个结构过渡,具有新的键形成 (C-O) 和键断裂.
- 1:3的CL-20/4,5-MDNI共晶体在55,63和95GPa时经历三次转化,形成新的共价键 (C-N,C-O,N-H).
- 通过分析格子参数,共价键长度,状态密度和光学系数来确认结构过渡.
结论:
- CL-20/4,5-MDNI共晶体表现出明显的压力诱导的结构和电子变化.
- 软体测量比对结构变化的数量和压力点具有关键的影响.
- 该研究提供了对高能材料和共晶设计的高压行为的见解.
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