物理化学学报 >> 1997, Vol. 13 >> Issue (10): 933-937.doi: 10.3866/PKU.WHXB19971014

研究简报 上一篇    下一篇

样品价态对激光气化产生Cu/Cl团簇的组成和稳定性的影响

李海洋,马晨生,白吉玲,何国钟   

  1. 中国科学院大连化学物理研究所,分子反应动力学国家重点实验室,大连 116023
  • 收稿日期:1997-01-27 修回日期:1997-04-01 发布日期:1997-10-15
  • 通讯作者: 李海洋

Valence of Precursor Compound Effects on the Stability and Composition of Cu/Cl Binary Cluster Produced by Laser Vaporization

Li Hai-Yang,Ma Chen-Sheng,Bai Ji-Ling,He Guo-Zhong   

  1. State Key Laboratory of Molecular Reaction Dynamics,Dalian Institute of Chemical Physics,Dalian 116023
  • Received:1997-01-27 Revised:1997-04-01 Published:1997-10-15
  • Contact: Li Hai-Yang

关键词: 激光气化, 飞行时间质谱, 团簇的结构, 团簇稳定性, Cu/Cl团簇

Abstract:

The production mechanism of Cu/Cl binary clusters were investigated by laser vaporization of CuCl, CuCl2, CuCl2•2H2O by time-of-flight mass spectrometry. We found that lager cluster size can be detected by using CuCl2•2H2O solid pellets than CuCl2 and CuCl. Only Cu+(CuCl)n, (CuCl)n, n <8 were observed when 532 nm laser vaporized the CuCl. We also found almost the same cluster using CuCl2 and CuCl2•2H2O in the same mass range, deficit Cu clusters were dominated for clusters with more than five Cu atoms when using CuCl2, CuCl2•2H2O compounds. The relation of relative intensity In2/In-1In+1 vs. different size of clusters were almost the same using different compounds above. (CuCl)3+•(CuCl) 6+ ions in (CuCl) n + series, and Cu6Cl5+ in Cu(CuCl) n + series have special stability. The magic number observed above are different from those of alkali halide (MX) clusters, hexagonal structures were proposed for the above magic number clusters.

Key words: Cluster, Laser vaporization, Time-of-flight mass spectrometry, Magic number, Stability