Acta Phys. -Chim. Sin. ›› 1996, Vol. 12 ›› Issue (02): 185-189.doi: 10.3866/PKU.WHXB19960220

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Production of Copper Oxide Negative Cluster Ions

Ma Chen-Sheng, Li Hai-Yang, Zhang Xiao-Guang, Bai Ji-Ling, Wang Xiu-Yan, Zhang Gui-Qiu, Wang Li, He Guo-Zhong, Lou Nan-Quan   

  1. State Key Laboratory of Molecular Reaction Dynamics,Dalian Institute of Chemical Physics,Academia Sinica,Dalian 116023
  • Received:1995-03-22 Revised:1995-08-15 Published:1996-02-15
  • Contact: Ma Chen-Sheng

Abstract:

Copper oxide cluster ions CunOm n=1-22, m=1-12 are generated by 523 nm laser ablation of CuCO3 solid sample with Time of Flight Mass Spectrometer detection. By changing precursor, we get similar TOF MS from Cu(NO3)2 sample, but narrower mass distribution from CuO sample. We suggest that this is caused by collisionally stabilization. Small gas molecules CO2 and NO2, generated by laser ablation of CuCO3 and Cu(NO3)2, act as buffer gas in supersonic molecular beams, and they are helpful for the production of high mass clusters.

Key words: Cluster, Laser ablation, Collsionally stabilization, Copper oxide