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Citation: TANG Xiao-Shuan, WANG Hong-Mei, HAN Hai-Yan, LI Jian-Quan, JIN Shun-Ping, HUANG Guo-Dong, CHU Yan-Nan, ZHANG Wei-Jun, ZHOU Shi-Kang. Chemiluminescence of Alkyl Bromides Reaction with Active Nitrogen[J]. Acta Physico-Chimica Sinica, ;2005, 21(04): 392-396. doi: 10.3866/PKU.WHXB20050410 shu

Chemiluminescence of Alkyl Bromides Reaction with Active Nitrogen

1.
Laboratory of Environmental Spectroscopy, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei, 230031; Laboratory of Atomic and Molecular Physics, College of Physics and Electronic Information, Anhui Normal University, Wuhu 241000

Received Date: 17 September 2004
Available Online: 15 April 2005

Active nitrogen has been prepared by hollow-cathode discharge of N₂ in a flowing afterglow system. Strong emission spectra of NBr(b¹Σ⁺→X³Σ^-) have been observed when alkyl bromides (CHBr₃, CH₂Br₂, C₂H₅Br, C₄H₉Br) are added to a stream of active nitrogen. In addition, weak CN(A²π, B²π→X²Σ⁺) emission spectra have been detected only in the case of CHBr₃ or CH₂Br₂ as reagents. Some tentative experiments show that the electronically excited NBr(b¹Σ⁺) is formed by mechanism of metastable N₂(A³Σ_u⁺) electronic-to-electronic energy transfer from ground state NBr(X³Σ^-), which is from the reaction of N(⁴S) with alkyl bromides. The excited CN (A²π, B²π) comes from the reaction of N(⁴S) with CBr formed due to CHBr₃(or CH₂Br₂) dissociation by N₂(A³Σ_u⁺).
- Active nitrogen; Energy transfer; Emission spectra; NBr; CN
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