基于它们的晶相结构,开发了黄 (Phg) 和六环三 (HCCP) 的全原子实证潜力
David Brown1, Méryll Barraco1,2,3, Nieck E Benes2
1Univ. Savoie Mont Blanc, Univ. Grenoble Alpes, CNRS, Grenoble INP, LEPMI, 38000 Grenoble, France.
The journal of physical chemistry. A
|August 13, 2024
概括
优化的力场准确地模拟了黄和六环三酶晶体结构. 这些模型对于通过模拟它们的纯密度相来开发新的存材料至关重要.
科学领域:
- 计算化学是一种计算化学.
- 材料科学是一种材料科学.
- 晶体学 晶体学是指结晶学.
背景情况:
- 开发精确的力场对于建模材料至关重要.
- 黄 (Phg) 和六环三 (HCCP) 是潜在的储存材料的关键组成部分.
- 现有的力场需要精细化,以准确地表示这些分子.
研究的目的:
- 为Phg和HCCP开发相互兼容的全原子实证潜力.
- 为了确保对Phg和HCCP纯密相的准确表示,用于网络聚合物建模.
- 根据已知的晶体结构和热力学特性验证力场.
主要方法:
- 用部分电荷增强现有的通用力场.
- 使用经典分子动力学 (MD) 模拟来优化力场.
- 匹配实验密度和升华的度,用于参数调整.
- 在恒压条件下使用大型超级细胞测试晶体结构稳定性.
主要成果:
- 开发出来的力场能够在不同温度下令人满意地代表Phg和HCCP的晶体结构.
- 优化的力场准确地复制实验密度和升华度.
- Phg晶体结构通过键和库伦相互作用 (>55%) 稳定.
- HCCP的晶体结构主要由范德瓦尔斯力稳定.
- 在N T条件下,模拟证实了两个晶体的正方体对称稳定性.
结论:
- 开发的力场为Phg和HCCP在其密集阶段提供了可靠的模型.
- 这些模型适用于模拟用于储应用的HCCP-Phg网络聚合物.
- 该研究验证了分子动力学用于预测材料特性和结构的使用.
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