Acta Phys. -Chim. Sin. ›› 1999, Vol. 15 ›› Issue (01): 22-27.doi: 10.3866/PKU.WHXB19990105

• ARTICLE • Previous Articles     Next Articles

Formation,Reaction and Photodessociation of Lead/Sulfur Clusters

Liu Jian-Bo, Han Chun-Ying, Zheng Wei-Jun, Gao Zhen, Kong Fan-Ao   

  1. State Key Laboratory of Molecular Reaction Dynamics,Institute of Chemistry,Chinese Academy of Sciences,Beijing 100871
  • Received:1998-03-27 Revised:1998-06-25 Published:1999-01-15
  • Contact: Gao Zhen

Abstract:

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.

Key words: Led/sulfur cluster, Laser ablation, Laer photodessociation, Time-of -flight mass spectrum