活性氮与碘乙烷反应化学发光研究

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.

Chemiluminescence Studies on Iodoethane Reaction with Active Ni-trogen

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.