| 甲胺分子多光子电离质谱研究 |
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| 引用本文： | 柳晓军,张冰,方黎,郭文跃,周金刚,蔡继业,路轶群,周士康.甲胺分子多光子电离质谱研究[J].物理化学学报,1996,12(11):981-985. |
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| 作者姓名： | 柳晓军 张冰 方黎 郭文跃 周金刚 蔡继业 路轶群 周士康 |
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| 作者单位： | Laser Spectroscopy Laboratory,Anhui Institute of Optics and Fine Mechanics,Academia Sinica,Hefei 230031 |
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| 摘 要： | 胜多光子电离飞行时间质谱法，利用可调谐脉冲激光器，测得了甲胺分子在不同激光波长和激光功率下的多光子电离和解离产物。母体离子ＣＨ３ＮＨ＾＋２的离解速常数随激光发波长的增大而减小。
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| 关 键 词： | 甲铵 多光子电离 飞行时间质谱 |
| 收稿时间： | 1996-05-10 |
| 修稿时间： | 1996-07-10 |
Study of the Multiphoton Ionization Mass Spectra of Methylamine |
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| Liu Xiaojun,Zhang Bing,Fang Li,Guo Wenyue,Zhou Jingang,Cai Jiye,Lu Yiqun,Zhou Shikang.Study of the Multiphoton Ionization Mass Spectra of Methylamine[J].Acta Physico-Chimica Sinica,1996,12(11):981-985. |
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| Authors: | Liu Xiaojun Zhang Bing Fang Li Guo Wenyue Zhou Jingang Cai Jiye Lu Yiqun Zhou Shikang |
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| Institution: | Laser Spectroscopy Laboratory,Anhui Institute of Optics and Fine Mechanics,Academia Sinica,Hefei 230031 |
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| Abstract: | Multiphoton ionization-dissociation process of Methylamine Molecules is studied using Time-Of-Flight mass spectrometer with a pulsed dye laser. Four ion peaks observed under different laser wavelength and laser power are assigned to CH3NH2+、CH2NH2+、 CHNH2+ (CH2NH+) and CHNH+. Based on the experimental results, the Multiphoton lonization and Dissociation(MPID) mechanism of CH3NH2 are discribed:CH3NH2 molecule is ionized to generate CH3NH2+ via 2+2 photon(two photon resonant excitation and two photon ionization)process. CH3NH2+ dissociate to produce CH2NH2+. CHNH2+(CH2NH+) and CHNH+ are generated by the consequent dissociation of CH2NH2+. The experimental results indicate that the dissociation rate constant of CH3NH2+ decreases as laser wavelength increases. |
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| Keywords: | Methylamine Multiphoton ionization and dissociation(MPID) Time-of-flight mass spectrometer(TOF-MS) |
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