物理化学学报 >> 1999, Vol. 15 >> Issue (09): 845-849.doi: 10.3866/PKU.WHXB19990914

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1，2-环氧丙烷的光电离解离通道与机理

刘付轶, 盛六四, 齐飞, 武国华, 高辉, 周卫东, 张允武   

  1. 中国科学技术大学国家同步辐射实验室，合肥 230026
  • 收稿日期:1998-11-17 修回日期:1999-02-26 发布日期:1999-09-15
  • 通讯作者: 张允武

Photoionization/Dissociation Channels and Mechanism of 1,2-Propylene Oxide

Liu Fu-Yi, Sheng Liu-Si, Qi Fei, Wu Guo-Hua, Gao Hui, Zhou Wei-Dong, Zhang Yun-Wu   

  1. National Synchrotron Radiation Lboratory,University of Science and Technology of China,Hefei 230026
  • Received:1998-11-17 Revised:1999-02-26 Published:1999-09-15
  • Contact: Zhang Yun-Wu

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关键词: 1, 2-环氧丙烷, 光电离, 出现势, 解离通道与机理

Abstract:

Photoionization/dissociation of 1,2-propylene oxide are performed by using a time of flight mass spectrometer(TOF MS) with vacuum ultraviolet photons from Hefei synchrotron radiation source. The photoionization TOF mass spectrum and photoionization efficiency(PIE) curves of fragment ions are measured. The appearance potentials(AP) of these ions are obtained from their PIE curves. From these data, the formation enthalpies of the observed ions have been evaluated, and their possible channels have been analyzed. The mechanism of dissociative photoionization of 1,2-propylene oxide has been discussed.

Key words: 1,2-propylene oxide, Photoionization, Appearance potential, Dissociation channel and mechanism