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三氯乙烯的真空紫外同步辐射光电离和光解离

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

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三氯乙烯的真空紫外同步辐射光电离和光解离

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

Vacuum ultraviolet photoionization and photodissociation of C2HCl3 by synchrotron radiation

Ma Jing, Ding Lei, Gu Xue-Jun, Fang Li, Zhang Wei-Jun, Wei Li-Xia, Wang Jing, Yang Bin, Huang Chao-Qun, Qi Fei
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  • 利用真空紫外(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三氯乙烯(C2HCl3)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C2HCl3的电离势PI(C2HCl3)=9.51±0.05eV,以及C2HCl3光解离碎片离子的出现势(PA):P
    The photoionization and photodissociation of C2HCl3 by vacuum ultraviolet (VUV) photons from synchrotron radiation source were investigated under the supersonic beam conditions by using a reflectron-time-of-flight mass spectrometer (TOF-MS). The photoionization mass spectrum and the photoionization efficiency (PIE) curves of the parent ion and some fragment ions were measured. The ionization energy of C2HCl3 was measured to be 9.51±0.05 eV. The potentials for the appearance of C2HCl+2, C2HCl+, and CCl+ are obtained to be 12.40±0.05, 15.88±0.05, and 18.33±0.05, respectively. The formation enthalpies of some major ions and the dissociation energy (DE) of C2HCl3 have been evaluated from these data. According to the experimental results and the theoretical calculations by G1 theory, the main possible channels of dissociative photoionization of C2HCl3 have been discussed. In the future, one can detect C2HCl3 with SPI-TOFMS technique using 118.0nm laser. Based on the mass spectrum obtained at that wavelength using synchrotron radiation source.
    • 基金项目: 中国科学院创新方向性项目(批准号:KJCX2-SW-H08)资助的课题.
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  • 文章访问数:  8070
  • PDF下载量:  1557
  • 被引次数: 0
出版历程
  • 收稿日期:  2005-09-02
  • 修回日期:  2005-12-14
  • 刊出日期:  2006-03-05

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