氟原子与溴代甲烷反应化学发光研究  

Study on Chemiluminescence from Reactions of F Atom with Bromine Substitute Methane

作　　者：储焰南[1] 周士康[1] 詹明生[1] 杨新[1] 刘军[1] 宋芳青[1] 史济良[2] 

机构地区：[1]中国科学院安徽光学精密机械研究所激光光谱学开放实验室,合肥230031 [2]中国科学院上海有机化学研究所,上海200032

出　　处：《化学学报》1993年第9期903-909,共7页Acta Chimica Sinica

基　　金：国家自然科学基金

摘　　要：用光子计数技术系统地探测了F(~2P)原子与溴代甲烷等(CH_3Br、CH_2Br_2和GHBr_3)反应在各种压力下的可见区(300～900 nm)化学发光,得到HF电子基态振动泛频跃迁及Br_2(B)、BrF(B)、GHF(A)、CH(A)等分子电子激发态跃迁的发射谱.求出HF(v=3)转动温度为480 K,计算机模拟光谱获得了Br_2(B)的振动布居.对比F与氯代甲烷反应的机理分析表明,初级反应主要是F提取H形成HF,多级反应产生了电子激发态的产物分子。Visible chemiluminescence in the region 300～900 nm was measured from reactions of F(~2P) atoms with CH_3Br, CH_2Br_2 and CHBr_2 at various pressures using crossed molecular beam setup. Emissions were observed from vibrationally excited HF^+(X) and from electronically excited Br_2(A or B), BrF(B), CHF(A) and CH(A). The rota tional temperature of HF(X) was obtained to be 480K. The relative vibrational populations of Br_2(B) and BrF(B) were solved by computer simulated spectrum. The reaction mechanism was discussed: the primary reaction is mainly the channel of H abstraction, and multistage processes produce electronically activated molecules.

关 键 词：化学发光 气相反应 溴代甲烷 

分 类 号：O623.21[理学—有机化学]