活性氮与碘乙烷反应化学发光研究  

Chemiluminescence Studies on Iodoethane Reaction with Active Nitrogen

作　　者：唐晓闩[1,2] 王鸿梅[1] 储焰南[1] 张为俊[1] 周士康[1] 

机构地区：[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 [2]安徽师范大学物理与电子信息学院芜湖241000

出　　处：《化学学报》2006年第16期1673-1675,共3页Acta Chimica Sinica

基　　金：国家自然科学基金(No.20577049);合肥物质研究院院长基金;安徽省优秀青年科技基金(No.06045098)资助项目.

摘　　要：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620～820nm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.Active nitrogen has been prepared by the hollow-cathode discharge through N2 in a flowing afterglow 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（b^1∑^＋→X^3∑^-） band system. The possible formation mechanism of the electronically excited NI（b^1∑^＋） was proposed to be the reaction of N（^2p） in active nitrogen with C2H5I based on some quenching experiments. This is the first experimental evidence about the excited NI（b^1∑^＋） generation through chemical reaction in gas phase, and the highest vibrational level detected is v＇= 6.

关 键 词：活性氮 流动余辉 发射光谱 NI自由基 

分 类 号：O621.25[理学—有机化学]