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Citation: Liu Fu-Yi, Sheng Liu-Si, Qi Fei, Wu Guo-Hua, Gao Hui, Zhou Wei-Dong, Zhang Yun-Wu. Photoionization/Dissociation Channels and Mechanism of 1,2-Propylene Oxide[J]. Acta Physico-Chimica Sinica, ;1999, 15(09): 845-849. doi: 10.3866/PKU.WHXB19990914 shu

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

1.
National Synchrotron Radiation Lboratory,University of Science and Technology of China,Hefei 230026

Received Date: 17 November 1998
Available Online: 15 September 1999

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.
- 1,2-propylene oxide,
- Photoionization,
- Appearance potential,
- Dissociation channel and mechanism
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