物理化学学报 >> 1995, Vol. 11 >> Issue (09): 840-843.doi: 10.3866/PKU.WHXB19950916

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呋喃分子多光子电离解离过程的反应通道

李海洋,白吉玲,沙国河   

  1. 中国科学院大连化学物理研究所，分子反应动力学国家重点实验室，大连 116023
  • 收稿日期:1994-08-29 修回日期:1994-12-21 发布日期:1995-09-15
  • 通讯作者: 李海洋

Multiphoton Ionization and Fragmentation Pathway of Furan Molecules at 450nm

Li Hai-Yang,Bai Ji-Ling,Sha Guo-He   

  1. State Key Laboratory of Molecular Reaction Dynamics,Dalian Institute of Chemical Physics,Chinese Acadmey of Sciences,Dalian 116023
  • Received:1994-08-29 Revised:1994-12-21 Published:1995-09-15
  • Contact: Li Hai-Yang

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关键词: 多光子电离质谱, 统计理论, 单分子反应, 呋喃

Abstract:

The multiphoton ionization and fragmentation pathway of furan at 450nm is analyzed on the basis of statistical theory and Ladder-Switching model. Our calculation indicates that fragmentation takes plase after furan molecules absorb six photons of 450nm, C+ begins to appear after absorption of nine photons, production of C2+ ions needs absorption of at least 15 photons. Our interesting result is that C+ ions is produced by dissociation of C3H+, CH2+ and C3+ ions, not of C2+ ions. Theoretically computed relative abundance of C+/C2+ after absorption 15photons agrees well with our experimental results.

Key words: Furan, Multiphoton ionization and fragmentation, Statistical theory, Unimolecular reaction