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题名: Reactions of laser ablated metal plasma with molecular alcohol beams: Dependence of the produced cluster ion species on the beam condition
作者: Niu, DM;  Li, HY;  Zhang, SD
关键词: metal plasma ;  alcohol cluster ;  laser ablation ;  time of flight mass spectrometry
刊名: CHINESE JOURNAL OF CHEMISTRY
发表日期: 2006-06-01
卷: 24, 期:6, 页:750-754
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences
类目[WOS]: Chemistry, Multidisciplinary
研究领域[WOS]: Chemistry
英文摘要: The gas phase reactions of metal plasma with alcohol clusters were studied by time of flight mass spectrometry (TOFMS) using laser ablation-molecular beam (LAMB) method. The significant dependence of the product cluster ions on the molecular beam conditions was observed. When the plasma acted on the low density parts of the pulsed molecular beam, the metal-alcohol complexes M(+)A(n) (M = Cu, Al, Mg, Ni and A = C2H5OH, CH3OH) were the dominant products, and the sizes of product ion clusters were smaller. While the plasma acted on the high density part of the beam, however, the main products turned to be protonated alcohol clusters H(+)A(n) and, as the reactions of plasma with methanol were concerned, the protonated water-methanol complexes H3O+(CH3OH), with a larger size (n <= 12 for ethanol and n <= 24 for methanol). Similarly, as the pressure of the carrier helium gas was varied from 1 x 10(5) to 5 x 10(5) Pa, the main products were changed from M(+)A(n) to H(+)A(n) and the sizes of the clusters also increased. The changes in the product clusters were attributed to the different formation mechanism of the output ions, that is, the M(+)A(n) ions came from the reaction of metal ion with alcohol clusters, while H(+)A(n) mainly from collisional reaction of electron with alcohol clusters.
关键词[WOS]: METHANOL CLUSTERS ;  DEHYDRATION REACTIONS ;  IONIZATION ;  BENZENE ;  CATIONS ;  TI+
语种: 英语
WOS记录号: WOS:000238343100006
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/140016
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Chinese Acad Sci, Dalian Inst Chem Phys, Dalian 116023, Peoples R China
2.Anhui Inst Opt & Fine Mech, Key Lab Environm Opt, Hefei 230031, Peoples R China

Recommended Citation:
Niu, DM,Li, HY,Zhang, SD. Reactions of laser ablated metal plasma with molecular alcohol beams: Dependence of the produced cluster ion species on the beam condition[J]. CHINESE JOURNAL OF CHEMISTRY,2006,24(6):750-754.
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