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Vacuum ultraviolet photoionization and dissociative photoionization of toluene: Experimental and theoretical insights.
Zhao, Yujie; Huang, Pei; Li, Li; Zhan, Yousheng; Wang, Ke; Yang, Haohang; Jin, Jianhui; Chen, Yuqian; Liu, Yibao; Sheng, Liusi; Chen, Jun; Cao, Maoqi.
Afiliación
  • Zhao Y; School of Nuclear Science and Engineering, 468741East China University of Technology, P.R. China.
  • Huang P; National Synchrotron Radiation Laboratory, School of Nuclear Science and Technology, 12652University of Science and Technology of China, P.R. China.
  • Li L; School of Nuclear Science and Engineering, 468741East China University of Technology, P.R. China.
  • Zhan Y; School of Nuclear Science and Engineering, 468741East China University of Technology, P.R. China.
  • Wang K; School of Nuclear Science and Engineering, 468741East China University of Technology, P.R. China.
  • Yang H; School of Nuclear Science and Engineering, 468741East China University of Technology, P.R. China.
  • Jin J; School of Nuclear Science and Engineering, 468741East China University of Technology, P.R. China.
  • Chen Y; School of Nuclear Science and Engineering, 468741East China University of Technology, P.R. China.
  • Liu Y; School of Nuclear Science and Engineering, 468741East China University of Technology, P.R. China.
  • Sheng L; School of Nuclear Science and Engineering, 468741East China University of Technology, P.R. China.
  • Chen J; National Synchrotron Radiation Laboratory, School of Nuclear Science and Technology, 12652University of Science and Technology of China, P.R. China.
  • Cao M; National Synchrotron Radiation Laboratory, School of Nuclear Science and Technology, 12652University of Science and Technology of China, P.R. China.
Eur J Mass Spectrom (Chichester) ; 27(5): 166-180, 2021 Oct.
Article en En | MEDLINE | ID: mdl-34612719
The photoionization and dissociative photoionization of toluene have been studied using synchrotron radiation vacuum ultraviolet light with photon energy in the range of 8.50-25.50 eV. The ionization energies (8.82 eV) and double ionization energies (23.80 eV) of toluene as well as the appearance energies for its major fragments C7H7+ (11.17/10.71 eV), C6H5+ (13.73 eV), C5H6+ (13.58/12.50 eV), C5H5+ (16.23 eV), C4H5+ (15.64 eV), C4H4+ (16.10 eV) and C4H3+ (17.11 eV) are determined, respectively by using photoionization efficiency spectrometry. With the help of experimental and theoretical results, seven dissociative photoionization channels have been proposed: C7H7+ + H, C6H5+ + CH3, C5H6+ + C2H2, C5H5+ + C2H2 + H, C4H5+ + C3H3, C4H4+ + C3H4 and C4H3+ + C3H4 + H. In addition, the geometries of the intermediates, transition states and products involved in these photoionization and dissociative photoionization processes have been performed at the B3LYP/6-311++G(d, p) level. The mechanisms of dissociative photoionization of toluene and the intermediates and transition states involved are discussed in detail. Generally speaking, the experimental results are in agreement with theoretical calculations in this work and published literature results. Especially the mechanisms of dissociative photoionization to C4H5+, C4H4+ and C4H3+ were discussed for the first time in this work. This investigation may provide useful information on understanding the photoionization and dissociative photoionization of toluene.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Eur J Mass Spectrom (Chichester) Año: 2021 Tipo del documento: Article Pais de publicación: Reino Unido
Texto completo
Añadir a Mi BVS
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Eur J Mass Spectrom (Chichester) Año: 2021 Tipo del documento: Article Pais de publicación: Reino Unido