| 532 nm及355 nm丁酮多光子电离质谱研究 |
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| 引用本文： | 张良芳,孔祥和,孙志青,刘建苹.532 nm及355 nm丁酮多光子电离质谱研究[J].物理实验,2007,27(7):13-16. |
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| 作者姓名： | 张良芳 孔祥和 孙志青 刘建苹 |
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| 作者单位： | 曲阜师范大学,物理工程学院,山东,曲阜,273165 |
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| 基金项目： | 曲阜师范大学校科研和教改项目 |
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| 摘 要： | 利用激光质谱法,采用355 nm及532 nm激光作为光源对丁酮分子进行了多光子电离解离研究,得到了2种波长下丁酮的多光子电离飞行时间质谱图主要有质荷比为1(H ),15(CH3 ),43(CH3CO )的质谱峰.532 nm质谱比较丰富,有较强的质荷比为45的信号,可以认为这是丁酮异构体电离解离得到的产物;同时探测到了质荷比为4,6,8的信号,可能是高价离子.355 nm质谱图相对简单.根据信号比例随激光能量的变化及主要的离子信号,得出了2种波长下主要的解离电离通道.
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| 关 键 词： | 丁酮 多光子电离质谱 激光质谱法 |
| 文章编号： | 1005-4642(2007)07-0013-04 |
| 修稿时间： | 2006年12月15 |
Study of mass spectrum of multi-photon ionization of 2-butanone at 532 nm and 355 nm |
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| ZHANG Liang-fang,KONG Xiang-he,SUN Zhi-qing,LIU Jian-ping.Study of mass spectrum of multi-photon ionization of 2-butanone at 532 nm and 355 nm[J].Physics Experimentation,2007,27(7):13-16. |
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| Authors: | ZHANG Liang-fang KONG Xiang-he SUN Zhi-qing LIU Jian-ping |
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| Institution: | College of Physics and Engineering, Qufu Normal University, Qufu 273165, China |
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| Abstract: | By means of laser mass spectrometry,using 355 nm and 532 nm lasers as excitation sources,2-butanone's multi-photon ionization and dissociation(MPID) is studied.2-butanone's mass spectrums of multi-photon ionization(MPI) under both wavelengths are mainly the spectrum peaks that mass charge ratios equal to 1(H ),15(CH3 ) and 43(CH3CO ).Mass spectrum at 532 nm is relatively complicated,and the signal of 45 is quite strong. Meanwhile we have detected ions of mass charge ratios of 4,6 and 8,which are probably multiply charged ions,but further research is needed.The mass spectrum at 355 nm is relatively simple.Finally we analyze the main possible dissociation and ionization channel at both wavelengths. |
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| Keywords: | 2-butanone mass spectrum of MPI laser mass spectrometry |
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