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Citation: Liu Jian-Bo, Han Chun-Ying, Zheng Wei-Jun, Gao Zhen, Kong Fan-Ao. Formation,Reaction and Photodessociation of Lead/Sulfur Clusters[J]. Acta Physico-Chimica Sinica, ;1999, 15(01): 22-27. doi: 10.3866/PKU.WHXB19990105 shu

Formation,Reaction and Photodessociation of Lead/Sulfur Clusters

1.
State Key Laboratory of Molecular Reaction Dynamics,Institute of Chemistry,Chinese Academy of Sciences,Beijing 100871

Received Date: 27 March 1998
Available Online: 15 January 1999

The formation and photodissociation of Pb/S cluster ions, produced by tow different ways of laser ablation, were studied with a tandem time-of-flight mass spectrometer. By laser direct ablation on a mixed Pb+S sample, the cluster ions with the compositions of PbnSn-1+ or PbnSn- were the most abundant species and can be identified as the stable components of Pb/S cluster ions. By laser double ablation on separated Pb sample and S sample, the products were PbnSm+(n=1-3, m=0-9) and PbnSm-(n=1-7, m=0-9) formed through reactions between Pb clusters and S clusters. Form the distributions of cluster compositions and the photodissociation of clusters, we can confirm two different formation mechanisms of Pb/S clusters according to the producing ways of clusters.
- Led/sulfur cluster,
- Laser ablation,
- Laer photodessociation,
- Time-of -flight mass spectrum
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