化学学报 ›› 2006, Vol. 64 ›› Issue (16): 1673-1675. 上一篇    下一篇

研究论文

活性氮与碘乙烷反应化学发光研究

唐晓闩1,2, 王鸿梅1, 储焰南*,1, 张为俊1, 周士康1   

  1. (1中国科学院安徽光学精密机械研究所环境光谱学研究室 环境光学与技术重点实验室 合肥 230031)
    (2安徽师范大学物理与电子信息学院 芜湖 241000)
  • 收稿日期:2005-10-25 修回日期:2006-01-15 出版日期:2006-08-28 发布日期:2006-08-28
  • 通讯作者: 储焰南

Chemiluminescence Studies on Iodoethane Reaction with Active Ni-trogen

TANG Xiao-Shuan1,2; WANG Hong-Mei1; CHU Yan-Nan*,1; ZHANG Wei-Jun1; ZHOU Shi-Kang 1   

  1. (1 Lab of Environmental Spectroscopy, Key Lab of Environmental Optics and Technology, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031)
    (2 College of Physics and Electronic Information, Anhui Normal University, Wuhu 241000)
  • Received:2005-10-25 Revised:2006-01-15 Online:2006-08-28 Published:2006-08-28
  • Contact: CHU Yan-Nan

在流动余辉装置上, 利用N2空心阴极放电制备活性氮, 研究了活性氮与碘乙烷(C2H5I)反应的化学发光. 在620~820 nm波长范围内观察到了较强的发射光谱, 拟合得到的光谱常数表明它来源于NI(b1Σ→X3Σ)跃迁, 并对35个谱峰进行了振动归属. 最后讨论了活性氮中主要成分与C2H5I反应的可能过程, 结合辅助性实验分析表明, 活性氮中的N(2P)与C2H5I直接反应很可能产生激发态NI(b1Σ)自由基. 这是利用化学反应直接产生激发态NI(b1Σ)的首次报道, 观察到的激发态最高振动能级为v'=6.

关键词: 活性氮, 流动余辉, 发射光谱, NI自由基

Active nitrogen has been prepared by the hollow-cathode discharge through N2 in a flowing af-terglow reactor. Strong emission spectra in the wavelength of 620~820 nm were detected when iodoethane (C2H5I) was added to a stream of active nitrogen, and the 35 spectral peaks have been assigned to the vibrational transitions of the NI(b1Σ→X3Σ) band system. The possible formation mechanism of the electronically excited NI(b1Σ) was proposed to be the reaction of N(2P) in active nitrogen with C2H5I based on some quenching ex-periments. This is the first experimental evidence about the excited NI(b1Σ) generation through chemical reaction in gas phase, and the highest vibrational level detected is v'=6.

Key words: active nitrogen, flowing afterglow, emission spectra, NI radical