在流动余辉装置上,利用空心阴极放电产生的活性氮与CHBr3分子碰撞,在550～750 nm波长范围内观察到了较强的NBr(b→X)跃迁发射谱;同时,在反应管的下游,我们探测到了CN(A,B)的发射谱.分析认为化学发光机理是:亚稳态氮原子N(2D)与CHBr3之间的一步传能反应直接产生了NBr(b)激发态,而CN(A,B)态则来自基态原子N(4S)与CBr的反应,其中CBr是CHBr3经活性氮中的亚稳态N2(A)激发离解形成的.
参考文献
| [1] | Wright A, Winkle C A. Active Nitrogen [M]. New York: Academic Press, 1968. |
| [2] | Nielsen J E, Douglass A R. Simulation of bromoform's contribution to stratospheric bromine [J]. J. Geo. Res.Atmospheres, 2001, 106: 8089. |
| [3] | Gribble G J. The natural production of organobromine compounds [J]. Environ. Sci. & Pollution Res., 2000, 7:37. |
| [4] | Kolts J H, Setser D W. in Reactive intermediates in the Gas Phase [M]. New York: Academic Press, 1979. |
| [5] | Pintassilgo C D, Loureiro J, et al. Methane decomposition and active nitrogen in a N2CH4 glow discharge at low pressures [J]. Plasma Sources Sci. Technol., 1999, 8: 463. |
| [6] | Tochikubo F, Teich T H. Optical emission from a pulsed corona discharge and its associated reactions [J]. Jpn.J. Appl. Phys., 2000, 39: 1343. |
| [7] | Braunstein M, Duff J W. Theoretical study of the N(2D)+O2(X a∑-g) → O+NO reaction [J]. J. Chem. Phys.,2000, 113: 7406. |
| [8] | Benedictis S D, Dilecce G. Rate constants for deactivation of N2(A) v = 2 ～ 7 by O, O2, and NO [J]. J. Chem.Phys., 1997, 107: 6219. |
| [9] | Milton E R, Dunford H B. Spectrum of NBr excited in active nitrogen [J]. J. Chem. Phys., 1961 , 35: 1202. |
| [10] | Lide D R, et al. CRC Handbook of Chemistry and Physics [M]. Boston, CRC Press, 1990. |
| [11] | Zou P, Sbu J, Sears T J, et al. Photodissociation of bromoform at 248 nm: single and multiphoton processes [J].J. Phys. Chem. A, 2004, 108: 1482. |
| [12] | McGivern W S, Sorkhabi O, et al. Primary and secondary processes in the photodissociation of CHBr3 [J]. J.Phys. Chem. A, 2000, 104: 10085. |
| [13] | Marr A J, Sears T J. High-resolution infrared diode laser spectroscopy of CBr [J]. J. Mol. Spectro., 1997, 184:413. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%