CHINESE JOURNAL OF ENERGETIC MATERIALS
+高级检索
面向高通量含能分子设计筛选的三种生成焓计算方法评估
作者:
作者单位:

1.西南科技大学环境友好能源材料国家重点实验室,四川 绵阳 621010;2.中国工程物理研究院化工材料研究所,四川 绵阳 621999

作者简介:

通讯作者:

基金项目:

国家自然科学基金项目(21875227),国家自然科学基金项目(21673210)


Evaluation of Three Heat of Formation Calculation Methods for High-throughput Energetic Molecule Design and Screening
Author:
Affiliation:

1.State Key Laboratory of Environment-friendly Energy Materials, Southwest University of Science and Technology, Sichuan Mianyang 621010, China;2.Institute of Chemical Materials, China Academy of Engineering Physics, Mianyang 621999, China

Fund Project:

  • 摘要
  • |
  • 图/表
  • |
  • 访问统计
  • |
  • 参考文献
  • |
  • 相似文献
  • |
  • 引证文献
  • |
  • 资源附件
    摘要:

    高通量含能分子设计需要兼顾准确性与效率的性能预测方法。结合原子化方案,对常见的3种不同水平的理论方法(半经验PM6方法、密度泛函理论方法B3LYP/6-31G(d,p)和高精度的完全基组CBS-4M方法)用于高通量含能分子设计筛选的生成焓(HOF)计算适宜性进行了评估。计算并比较了20种含能分子的固相HOF,发现不同理论水平预测结果存在较大差异;而基于10种常见含能分子的不同水平下的HOF,实验密度和Kamlet-Jacobs(K-J)、Becker-Kistiakowsky-Wilson(BKW)与Virial-Wu (VLW)3种模型预测的爆轰性能差别不大。其中B3LYP方法具有最佳适宜性,具有较高的计算效率且爆轰性能预测结果同CBS方法接近,如基于BKW模型计算的爆速和爆压的平均相对偏差仅为0.4%和1.2%。而低精度的PM6方法和高耗时的CBS方法难以满足兼顾高通量含能分子设计筛选中的精度和效率的要求。这表明,在高通量的含能分子设计筛选中,可考虑中等精度的方法进行快速的HOF预测。

    Abstract:

    The performance prediction methods for high-throughput energetic molecule design and screening are required to balance accuracy and efficiency. In the present work, the suitability of three common theoretical methods on different levels, including semi-empirical PM6 method, density functional theory method B3LYP/6-31G(d,p), and high-precision complete basis set CBS-4 method, for heat of formation (HOF) prediction under the atomization scheme for high-throughput energetic molecule design and screening were evaluated. The solid HOF of twenty energetic molecules were compared, and the results of different theoretical levels are found to differ greatly. Based on the predicted HOF, experimental density, and three models (K-J, BKW and VLW), the detonation performance of ten common energetic molecules were predicted. The results show that B3LYP method possesses the best suitability and efficiency, and the predicted detonation performance is closed to that obtained by CBS method. For example, the average relative deviation of the detonation velocity and detonation pressure predicted by BKW are only 0.4% and 1.2%, respectively. However, both the low-precision PM6 method and the time-consuming CBS method are difficult to balance the requirements of precision and efficiency in high-throughput energetic molecule design and screening. It suggests that, for the high-throughput design of energetic molecules, a medium-precision method is adequate for rapid HOF prediction.

    参考文献
    相似文献
    引证文献
文章指标
  • PDF下载次数:
  • HTML阅读次数:
  • 摘要点击次数:
  • 引用次数:
引用本文

保福成,彭汝芳,张朝阳.面向高通量含能分子设计筛选的三种生成焓计算方法评估[J].含能材料, 2022, 30(7):726-735. DOI:10.11943/CJEM2021308.
BAO Fucheng, PENG Rufang, ZHANG Chaoyang. Evaluation of Three Heat of Formation Calculation Methods for High-throughput Energetic Molecule Design and Screening[J]. Chinese Journal of Energetic Materials, 2022, 30(7):726-735. DOI:10.11943/CJEM2021308.

复制
历史
  • 收稿日期: 2021-11-18
  • 最后修改日期: 2022-01-25
  • 录用日期: 2022-01-20
  • 在线发布日期: 2022-01-21
  • 出版日期: 2022-07-25