氟原子与氯溴代甲烷反应的光谱及动力学研究  

Spectra and Dynamics of F Atom Reactions with Bromochloromethanes

作　　者：杨新[1] 周士康[1] 詹明生[1] 宋芳青[1] 史济良[1] 

机构地区：[1]中国科学院安徽光机所激光光谱学开放研究实验室,中国科学院上海有机化学研究所

出　　处：《Chinese Journal of Chemical Physics》1995年第2期105-112,共8页化学物理学报（英文）

基　　金：国家自然科学基金

摘　　要：本文报导了氯原子与三种含氢氯溴代甲烷（ＣＨ２ＢｒＣｌ、ＣＨＢｒＣｌ２、ＣＨＢｒ２Ｃｌ）反应的光谱及动力学研究结果．观察了这些反应的可见化学发光（３００—９００ｎｍ）和染料Ｒ６Ｇ波段（５６５—６１０ｎｍ）的激光诱导荧光，观测到ＨＦ基电子态振动泛频跃迁和Ｂｒ２（Ａ．Ｂ）、ＢｒＦ（Ｂ）分子电子激发态跃迁的发射谱以及ＢｒＦ（Ｘ）、ＣＨＦ（Ｘ）的基电子态的激发谱．计算机模拟光谱求出了Ｂｒ２（Ｂ）、ＢｒＦ（Ｘ）的相对振动布居．反应机理分析表明，初级反应产物主要是ＨＦ振动激发态分子．实验中现察到的许多其它产物来自次级反应．不同的反应．特别是卤化原子的种类与数量的不同对反应结果有较大的影响．Abstract This paper systematically reports the results on the study of spectra and dynamics of F atom reactions with three bromochloromethanes(CH2BrCl、CHBr2Cl, CHBr2Cl). The visible chemiluminescence (300-900nm)and the laser induced fluorescence(spectral region of dye R6G 565 610nm) were observed, the overtone emission spetra from vibrationally exited HF,electronically excited Br2(A,B), BrF(B),and the excitation spetra from BrF(X), CHF (X) were measured. The rotational temperature of v' = 3 state of BrF(X) and the relative vibrational populations of Br2(B) and BrF(X) were obtained. The reaction mechanism analysis indicated that the primary reactions are mainly the vibrationally excited HF, other molecules observed are produced from secondary processes. It is the difference of the kind and amount of halogen atom subsitutians that is responsible for the results.

关 键 词：氟 氯溴代甲烷 反应动力学 光谱 卤代甲烷 

分 类 号：O613.41[理学—无机化学] O623.21[理学—化学]