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四氯乙烯的同步辐射光电离研究

马 靖 丁 蕾 顾学军 郑海洋 方 黎 张为俊 黄超群 卫立夏 杨 斌 齐 飞

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四氯乙烯的同步辐射光电离研究

马 靖, 丁 蕾, 顾学军, 郑海洋, 方 黎, 张为俊, 黄超群, 卫立夏, 杨 斌, 齐 飞

Photoionization studies of C2Cl4 using synchrotron radiation

Ma Jing, Ding Lei, Gu Xue-Jun, Zheng Hai-Yang, Fang Li, Zhang Wei-Jun, Huang Chao-Qun, Wei Li-Xia, Yang Bin, Qi Fei
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  • 利用VUV同步辐射光源和反射式飞行时间质谱仪,在超声冷却条件下对四氯乙烯(C2Cl4)进行了光电离研究,通过测量各离子的光电离效率(PIE)曲线,得到了C2Cl4的电离势IP(C2Cl4) =(9.36±0.05)eV及C2Cl4光解离碎片离子C2Cl3+,C
    The photoionization and photodissociation processes of C2Cl4 were investigated under the supersonic molecular beam conditions by using a reflectron-time-of-flight mass spectrometer (TOF-MS) and vacuum ultraviolet (VUV) photons from synchrotron radiation source. The photoionization mass spectrum and the photoionization efficiency (PIE) curves of the parent ion and some fragment ions were measured. The appearance potentials of these ions are obtained from their PIE curves. The formation enthalpies of some major ions and the dissociation energy of C2Cl4 have been evaluated from these data. According to the experimental results and the energy calculated by G1 theory, the main possible channels of dissociative photoionization of C2Cl4 have been discussed. In the future, we can detect C2Cl4 with single photon ionization(SPI)-TOFMS technique using 118.0nm laser radiation. This is based on the mass spectrum obtained at the wavelenth by using synchrotron radiation source.
    • 基金项目: 中科院创新方向性项目(批准号:KJCX2-SW-H08)资助的课题.
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  • 文章访问数:  7917
  • PDF下载量:  1196
  • 被引次数: 0
出版历程
  • 收稿日期:  2005-04-22
  • 修回日期:  2005-05-24
  • 刊出日期:  2006-01-20

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