Turn off MathJax
Article Contents

Lijun Geng, Hanyu Zhang, Haiming Wu, Zhen-Dong Sun, Zhixun Luo. Ionization and Dissociation of Benzene and Aniline under Deep Ultraviolet Laser Irradiation[J]. Chinese Journal of Chemical Physics .
Citation: Lijun Geng, Hanyu Zhang, Haiming Wu, Zhen-Dong Sun, Zhixun Luo. Ionization and Dissociation of Benzene and Aniline under Deep Ultraviolet Laser Irradiation[J]. Chinese Journal of Chemical Physics .

Ionization and Dissociation of Benzene and Aniline under Deep Ultraviolet Laser Irradiation

  • Received Date: 2020-06-05
  • Accepted Date: 2020-07-20
  • Rev Recd Date: 2020-07-13
  • Available Online: 2020-07-31
  • We report a study on photo-ionization of benzene and aniline with incidental subsequent dissociation by the customized reflection time-of-flight mass spectrometer utilizing a deep ultraviolet (DUV) 177.3 nm laser. Highly efficient ionization of benzene is observed with a weak C4H3+ fragment formed by undergoing disproportional C−C bond dissociation. In comparison, a major C5H6+• fragment and a minor C6H6+• radical are produced in the DUV ionization of aniline pertaining to the removal of CNH* and NH* radicals, respectively. First-principles calculation is employed to reveal the photo-dissociation pathways of these two molecules having a structural difference of just an amino group. It is demonstrated that hydrogen atom transfer (HAT) plays an important role in the cleavage of C−C or C−N bonds in benzene and aniline ions. This study helps understand the underlying mechanisms of chemical bond fracture of benzene ring and related aromatic molecules.
  • 加载中
  • 加载中
通讯作者: 陈斌, bchen63@163.com
  • 1. 

    沈阳化工大学材料科学与工程学院 沈阳 110142

  1. 本站搜索
  2. 百度学术搜索
  3. 万方数据库搜索
  4. CNKI搜索

Article Metrics

Article views(7) PDF downloads(0) Cited by()

Proportional views
Related

Ionization and Dissociation of Benzene and Aniline under Deep Ultraviolet Laser Irradiation

Abstract: We report a study on photo-ionization of benzene and aniline with incidental subsequent dissociation by the customized reflection time-of-flight mass spectrometer utilizing a deep ultraviolet (DUV) 177.3 nm laser. Highly efficient ionization of benzene is observed with a weak C4H3+ fragment formed by undergoing disproportional C−C bond dissociation. In comparison, a major C5H6+• fragment and a minor C6H6+• radical are produced in the DUV ionization of aniline pertaining to the removal of CNH* and NH* radicals, respectively. First-principles calculation is employed to reveal the photo-dissociation pathways of these two molecules having a structural difference of just an amino group. It is demonstrated that hydrogen atom transfer (HAT) plays an important role in the cleavage of C−C or C−N bonds in benzene and aniline ions. This study helps understand the underlying mechanisms of chemical bond fracture of benzene ring and related aromatic molecules.

Lijun Geng, Hanyu Zhang, Haiming Wu, Zhen-Dong Sun, Zhixun Luo. Ionization and Dissociation of Benzene and Aniline under Deep Ultraviolet Laser Irradiation[J]. Chinese Journal of Chemical Physics .
Citation: Lijun Geng, Hanyu Zhang, Haiming Wu, Zhen-Dong Sun, Zhixun Luo. Ionization and Dissociation of Benzene and Aniline under Deep Ultraviolet Laser Irradiation[J]. Chinese Journal of Chemical Physics .

Catalog

    /

    DownLoad:  Full-Size Img  PowerPoint
    Return
    Return