SIOC English
化学学报
高级检索

化学学报 ›› 2010, Vol. 68 ›› Issue (20): 2059-2062. 上一篇    下一篇

研究论文

1,3,5-三甲苯的光电离的实验研究

陶玲1,2，黄明强3，张为俊*,1,2，王振亚1,2，方文正4，单晓斌4，刘付轶4，盛六四4   

  1. (1中国科学院安徽光学精密机械研究所大气成分与光学重点 合肥 230031)
    (2中国科学院安徽光学精密机械研究所环境光谱学实验室 合肥 230031)
    (3厦门大学嘉庚学院环境科学与工程系 厦门 363105)
    (4中国科学技术大学国家同步辐射实验室 合肥 230026)
  • 投稿日期:2009-11-02 修回日期:2010-04-05 发布日期:2010-05-31
  • 通讯作者: 张为俊 E-mail:wjzhang@aiofm.ac.cn
  • 基金资助:

    中国科学院创新基金（KJCX2-YW-N24）、国家自然科学基金（No. 10675112）、2009年度教育部“博士生创新计划”同步辐射研究生创新基金

Experimental Study on Photoionization of 1,3,5-Trimethylbenzene

Tao Ling1,2 Huang Mingqiang3 Zhang Weijun*,1,2 Wang Zhenya1,2 Fang Wenzheng4 Shan Xiaobin4 Liu Fuyi4 Sheng Liusi4   

  1. (1 Key Laboratory of Atomospheric Composition and Optical Radiation, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031)
    (2 Laboratory of Environment Spectroscopy, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031)
    (3 Department of Environmental Science and Engineering, Tan Kah Kee College of Xiamen University, Xiamen 363105)
    (4 National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei 230026)
  • Received:2009-11-02 Revised:2010-04-05 Published:2010-05-31

PDF

1338

利用超声分子束、真空紫外同步辐射和反射式飞行时间质谱仪开展1,3,5-三甲基苯(TMB, C9H12)的光电离和光解离研究. 利用光电离质谱和光电离效率曲线, 确定母体分子的电离能, 主要碎片离子 和 的出现能分别为(8.32±0.03), (11.71±0.03)和(11.59±0.03) eV. 根据经验公式, 计算出形成 和 的解离能(Ed)分别为(3.39±0.06)和(3.27±0.06) eV. 再利用相关的热化学参数, 推算出 , 和 的标准生成焓为786.87, 897.93和956.68 kJ/mol.

关键词: 1,3,5-三甲基苯, 同步辐射, 光电离质谱, 光解离

The photoionization and dissociation of 1,3,5-trimethylbenzene (TMB, C9H12) have been obtained using supersonic molecule beam, synchrotron radiation and photoionization mass spectrometry (PIMS). The photoionization efficiency (PIE) curves of the parent ion and some fragment ions were measured. The ionization energy (IE) of TMB and the appearance energies (AEs) of and were measured to be (8.32±0.03), (11.71±0.03) and (11.59±0.03) eV respectively. The dissociation energies (Ed) to produce and were deduced to be (3.39±0.06) and (3.27±0.06) eV respectively. The formation enthalpies of , and were also deduced to be 786.87, 897.93 and 956.68 kJ/mol respectively.

Key words: 1,3,5-trimethylbenzene; synchrotron radiation; photoionization mass spectrometry, dissociative photoionization