中国物理B ›› 2018, Vol. 27 ›› Issue (5): 56401-056401.doi: 10.1088/1674-1056/27/5/056401

• SPECIAL TOPIC—Recent advances in thermoelectric materials and devices • 上一篇    下一篇

Compression behavior and spectroscopic properties of insensitive explosive 1,3,5-triamino-2,4,6-trinitrobenzene from dispersion-corrected density functional theory

Yan Su(苏艳), Junyu Fan(范俊宇), Zhaoyang Zheng(郑朝阳), Jijun Zhao(赵纪军), Huajie Song(宋华杰)   

  1. 1 Key Laboratory of Materials Modification by Laser, Electron, and Ion Beams, Dalian University of Technology, Ministry of Education, Dalian 116024, China;
    2 National Key Laboratory of Shock Wave and Detonation Physics, Institute of Fluid Physics, Chinese Academy of Engineering Physics, Mianyang 621900, China;
    3 Beijing Institute of Applied Physics and Computational Mathematics, Beijing 100088, China
  • 收稿日期:2018-01-18 修回日期:2018-02-08 出版日期:2018-05-05 发布日期:2018-05-05
  • 通讯作者: Jijun Zhao, Huajie Song E-mail:zhaojj@dlut.edu.cn;song_huajie@iapcm.ac.cn
  • 基金资助:

    Project supported by the Science Challenge Project of China (Grant No.TZ2016001),the National Natural Science Foundation of China (Grant Nos.11674046 and 11372053),the Fundamental Research Funds for the Central Universities of China (Grant No.DUT17GF203),the Opening Project of State Key Laboratory of Explosion Science and Technology,Beijing Institute of Technology,China (Grant No.KFJJ16-01M),and the Supercomputing Center of Dalian University of Technology,China.

Compression behavior and spectroscopic properties of insensitive explosive 1,3,5-triamino-2,4,6-trinitrobenzene from dispersion-corrected density functional theory

Yan Su(苏艳)1, Junyu Fan(范俊宇)1, Zhaoyang Zheng(郑朝阳)2, Jijun Zhao(赵纪军)1, Huajie Song(宋华杰)3   

  1. 1 Key Laboratory of Materials Modification by Laser, Electron, and Ion Beams, Dalian University of Technology, Ministry of Education, Dalian 116024, China;
    2 National Key Laboratory of Shock Wave and Detonation Physics, Institute of Fluid Physics, Chinese Academy of Engineering Physics, Mianyang 621900, China;
    3 Beijing Institute of Applied Physics and Computational Mathematics, Beijing 100088, China
  • Received:2018-01-18 Revised:2018-02-08 Online:2018-05-05 Published:2018-05-05
  • Contact: Jijun Zhao, Huajie Song E-mail:zhaojj@dlut.edu.cn;song_huajie@iapcm.ac.cn
  • Supported by:

    Project supported by the Science Challenge Project of China (Grant No.TZ2016001),the National Natural Science Foundation of China (Grant Nos.11674046 and 11372053),the Fundamental Research Funds for the Central Universities of China (Grant No.DUT17GF203),the Opening Project of State Key Laboratory of Explosion Science and Technology,Beijing Institute of Technology,China (Grant No.KFJJ16-01M),and the Supercomputing Center of Dalian University of Technology,China.

摘要:

Using dispersion corrected density functional theory, we systematically examined the pressure effect on crystal structure, cell volume, and band gap of 1,3,5-triamino-2,4,6-trinitrobenzene (TATB) to understand its extraordinary chemical stability. Analysis of the Mulliken population and the electron density of states implied a possible charge transfer in TATB with increasing pressure. Raman and infrared spectra of TATB under hydrostatic pressure up to 30 GPa were simulated. The observed strong coupling between NH2 groups and NO2 groups with increasing pressure, which is considered to have a tendency of energy transfer with these vibrational modes, was analyzed. The pressure-induced frequency shift of selected vibrational modes indicated minor changes of molecular conformation mainly by the rotation of NH2 groups. Compression behavior and spectroscopic property studies are expected to shed light on the physical and chemical properties of TATB on an atomistic scale.

关键词: 1,3,5-triamino-2,4,6-trinitrobenzene, high-pressure behavior, molecular conformation, Raman spectra

Abstract:

Using dispersion corrected density functional theory, we systematically examined the pressure effect on crystal structure, cell volume, and band gap of 1,3,5-triamino-2,4,6-trinitrobenzene (TATB) to understand its extraordinary chemical stability. Analysis of the Mulliken population and the electron density of states implied a possible charge transfer in TATB with increasing pressure. Raman and infrared spectra of TATB under hydrostatic pressure up to 30 GPa were simulated. The observed strong coupling between NH2 groups and NO2 groups with increasing pressure, which is considered to have a tendency of energy transfer with these vibrational modes, was analyzed. The pressure-induced frequency shift of selected vibrational modes indicated minor changes of molecular conformation mainly by the rotation of NH2 groups. Compression behavior and spectroscopic property studies are expected to shed light on the physical and chemical properties of TATB on an atomistic scale.

Key words: 1,3,5-triamino-2,4,6-trinitrobenzene, high-pressure behavior, molecular conformation, Raman spectra

中图分类号:  (Molecular crystals)

  • 64.70.kt
91.60.Gf (High-pressure behavior) 78.30.-j (Infrared and Raman spectra)