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Reaction of Cationic Vanadium Oxide Clusters with Ethylene in a Flow Tube Reactor
Wei-gang Wang,Zhe-chen Wang,Shi Yin,Sheng-gui He*,Mao-fa Ge*
Author NameAffiliationE-mail
Wei-gang Wang Beijing National Laboratory for Molecular Science, State Key Laboratory for Structural Chemistry of Unstable and Stable Species, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080, China  
Zhe-chen Wang Beijing National Laboratory for Molecular Science, State Key Laboratory for Structural Chemistry of Unstable and Stable Species, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080, China  
Shi Yin Beijing National Laboratory for Molecular Science, State Key Laboratory for Structural Chemistry of Unstable and Stable Species, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080, China  
Sheng-gui He* Beijing National Laboratory for Molecular Science, State Key Laboratory for Structural Chemistry of Unstable and Stable Species, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080, China shengguihe@iccas.ac.cn 
Mao-fa Ge* Beijing National Laboratory for Molecular Science, State Key Laboratory for Structural Chemistry of Unstable and Stable Species, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080, China gemaofa@iccas.ac.cn 
Abstract:
A time of °ight mass spectrometer coupled with a cluster formation and reaction source is employed to study the reactivity of cationic vanadium oxide clusters (VmOn+) toward ethylene (C2H4) in the gas phase. The cationic vanadium oxide clusters with m=1-10 and n=1-26 (depending on m) are generated by reaction of laser ablation created vanadium plasma with O2 in a supersonic expansion and then reacted with the ethylene in a °ow tube reactor. Hydrogen atoms are attached in most of the oxygen saturated clusters(2n?5m) in our experimental condition. The reactivity of VmOn+ toward C2H4 is usually higher than that of hydrogen containing clusters, VmOnH2x +. Larger clusters show less reactivity than smaller ones. Most of the observed products are in the forms of VmOnC2H4+ and VmOnH2xC2H4+ due to direct association. C2H4 clustering products ((C2H4)n+, n=2-6) are also observed.
Key words:  Time of °ight mass spectrometer, Vanadium oxide clusters, Flow tube reactor, Reactivity
FundProject:中国科学院百人计划
钒氧化物团簇正离子与乙烯在流动管反应器中的反应
王炜罡,王哲瑁,殷实,何圣贵*,葛茂发*
摘要:
利用一套自建的配有团簇产生和化学反应源的飞行时间质谱装置,研究了钒氧化物团簇正离子(VmOn+)与乙烯(C2H4)在气相条件下的反应.激光溅射产生的钒等离子体与氧气分子在超声喷射下反应,产生m=1?10和n=1?26 (具体数字依赖于m) 的VmOn+,然后与流动管反应器中的乙烯反应. 该实验条件下, 氧饱和团簇(2n?5m)往往含有氢原子(VmOnH2x+).与乙烯反应时,相对于VmOnH2x+,VmOn+表现出比较高的反应活性,而且,小团簇比大团簇具有较高的反应活性.观测到的反应产物大都为碰撞结合体V
关键词:  飞行时间质谱仪, 钒氧化物团簇, 流动管反应器, 反应活性
DOI:10.1088/1674-0068/20/04/412-418
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