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题名: Formation of lead/sulfur binary cluster ions by laser ablation
作者: Liu, JB;  Han, CY;  Zheng, WJ;  Gao, Z;  Zhu, QH
关键词: lead/sulfur clusters ;  laser ablation ;  time-of-flight (TOF) mass spectrometer ;  photodissociation
刊名: INTERNATIONAL JOURNAL OF MASS SPECTROMETRY
发表日期: 1999-08-11
卷: 189, 期:2-3, 页:147-156
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences ;  Technology
类目[WOS]: Physics, Atomic, Molecular & Chemical ;  Spectroscopy
研究领域[WOS]: Physics ;  Spectroscopy
英文摘要: Lead/sulfur binary cluster ions were produced by laser single ablation and laser double ablation, respectively, photolyzed by a UV laser and detected with a tandem time-of-flight (TOF) mass spectrometer. The distribution of cluster ions produced by laser single ablation is different from that produced by laser double ablation. By laser single ablation on a mixed Pb + S target, PbnSn-1+ and PbnSn- are formed as stable compositions that serve as structural skeletons of the binary clusters. All other cluster ions can be indicated as PbnSm+ with m greater than or equal to n - 1 or PbnSm- with m greater than or equal to n, produced by the attachment of excess S atoms to PbnSn-1+ or PbnSn-. The stable compositions shown above are also found in the fragments from the main photodissociation channels of cluster cations, confirming their special stability. The structural models of the cluster ions with stable compositions are proposed. On the other hand, by laser double ablation on a separated Pb target and S target, the Pb clusters and S clusters are formed independently and then react with each other to generate binary cluster ions PbnSm+ and PbnSm- with n = 1-7 and m greater than or equal to 0. These two different formation pathways, by laser single ablation and laser double ablation, respectively, can lead to distinct differences in the compositions and distributions of the cluster ions. The different properties, such as internal energies or structural isomers, for a single stoichiometry from the different formation pathways are also discussed. (Int J Mass Spectrom 189 (1999) 147-156) (C) 1999 Elsevier Science B.V.
关键词[WOS]: OPTICAL-PROPERTIES ;  PBS NANOCLUSTERS ;  METAL ;  PHOTODISSOCIATION
语种: 英语
WOS记录号: WOS:000082049200006
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/138540
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, Inst Chem, State Key Lab Mol React Dynam, Beijing 100080, Peoples R China

Recommended Citation:
Liu, JB,Han, CY,Zheng, WJ,et al. Formation of lead/sulfur binary cluster ions by laser ablation[J]. INTERNATIONAL JOURNAL OF MASS SPECTROMETRY,1999,189(2-3):147-156.
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