高等学校化学学报

高等学校化学学报 ›› 1995, Vol. 16 ›› Issue (7): 1114.

• 研究快报 • 上一篇    下一篇

高温瞬时热解法产生甲基自由基束

刘兆祥, 李润君, 陆建江, 秦启宗   

  1. 复旦大学激光化学研究所, 上海, 200433
  • 收稿日期:1995-03-25 出版日期:1995-07-24 发布日期:1995-07-24
  • 通讯作者: 秦启宗
  • 作者简介:刘兆祥,男,24岁,硕士研究生.
  • 基金资助:

    国家自然科学基金

Methyl Free Radical Beam Generated by Flash Pyrolysis Method

LIU Zhao-Xiang, LI Run-Jun, LU Jian-Jiang, QIN Qi-Zong   

  1. Laser Chemistry Institute, Fudan University, Shanghai, 200433
  • Received:1995-03-25 Online:1995-07-24 Published:1995-07-24

PDF (PC)

被引次数

2

摘要： Chen等提出了用脉冲分子束快速通过高温加热管与射流冷却相结合的高温瞬时热解法可产生高纯度自由基,当以偶氮甲烷为前体时可获得性能良好的CH3·自由基束,并成功地用于生长金刚石薄膜。但偶氮甲烷的制备比较复杂,且价格昂贵,不易长期保存。

关键词: 甲基自由基, 瞬时热解, 2-叔丁基过氧化物

Abstract: The technique of the high-temperatufe flash pyrolysis has been used for the generation of jet-cooled methyl free radical beam. The result shows that Di-tert-butyl peroxide (DTBP) starts to decompose obviously at temperature up to 900 K, and reaches the complete decomposition at 1300 K. Short contact time of the seeded precursor molecules (4% mole DTBP in He) suppresses recombination of the methyl radicals. The major fragments for the flash pyrolysis of DTBP are CH3COCH3and CH3·radical.

Key words: Methyl free radical, Flash pyrolysis, Di-t-butyl peroxide

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