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Laser Induced Fluorescence Excitation Spectra of CCl2 in a Supersonic Jet-cooled
Gao Yide,Hu Changjin,Ran Qin,Chen Yang,Chen Congxiang
Author NameAffiliationE-mail
Gao Yide Laboratory of Bond Selective Chemistry, Chinese Acadmy of Science, Department of Chemical Physics, University of Science and Technology of China, Hefei 230026  
Hu Changjin Laboratory of Bond Selective Chemistry, Chinese Acadmy of Science, Department of Chemical Physics, University of Science and Technology of China, Hefei 230026  
Ran Qin Laboratory of Bond Selective Chemistry, Chinese Acadmy of Science, Department of Chemical Physics, University of Science and Technology of China, Hefei 230026  
Chen Yang Laboratory of Bond Selective Chemistry, Chinese Acadmy of Science, Department of Chemical Physics, University of Science and Technology of China, Hefei 230026  
Chen Congxiang Laboratory of Bond Selective Chemistry, Chinese Acadmy of Science, Department of Chemical Physics, University of Science and Technology of China, Hefei 230026 cxchen@ustc.edu.cn 
Abstract:
CCl2was produced by dc discharge of CCl4seeded in Argon gas with a ratio of 1/50. Laser induced fluorescence excitation spectrum of CCl2~A1B1-~X1A1between 440~580 nm has been measured under the supersonic free-jet conditions. The K-structures of (v1, v2, v3)-( 0, 0, 0 ) bands were clearly resolved and assigned to 722 subbands. The vibrational frequencies,ω1=631.20 cm-1,ω2=302.00 cm-1, andA′-B′=3.476 cm-1in the excited state were obtained.
Key words:  CCl2radical, Supersonic jet, Laser induced fluorescence (LIF) excitation spectrum, The K-structure resolved spectrum
FundProject:国家自然科学基金资助项目(299730380, 10032050), 国家重点基础研究专项基金资助项目(G1999075304).
超声射流CCl2 自由基激光诱导荧光激发谱
高义德,胡长进,冉琴,陈旸,陈从香*
摘要:
用CCl4/Ar混合气体脉冲直流高压放电产生CCl2自由基,在超声射流冷却下获得了CCl2 1B1- 1A1 440~580 nm 的K-结构分辨的激光诱导荧光激发谱.通过K-结构分辨谱的分析,对722条转动子谱带进行了归属,得到了激发态CCl2 1B1的两个全对称振动模式的振动频率、非谐性常数和转动常数差值,即激发态的振动频率ω1=631.20 cm-1, ω2=302.00 cm-1, A′-B′=3.476 cm-1.
关键词:  CCl2自由基  超声射流冷却  激光诱导荧光激发谱  K-结构分辨谱
DOI:10.1088/1674-0068/15/1/5-10
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