Experimental and Theoretical Studies of (CsI) n Cs+ Cluster Ions Produced by 355 nm Laser Desorption Ionization Academic Article uri icon

abstract

  • Collision cross-sections of gas-phase (CsI)n = (1-7)Cs(+) cluster ions formed by pulsed-UV laser (355 nm) desorption ionization are measured by ion mobility-mass spectrometry. Experimental collision cross-sections are compared with calculated cross sections of candidate structures generated from a search for the lowest energy structures at the DFT/B3LYP/LACV3P** and MP2/LACVP3P** levels. The relative stabilities of these candidate structures are examined by IM-CID-MS, and the experimental results are compared to theoretical predictions. Analysis of (CsI)n = (1-7)Cs(+) cluster ion dissociation energies shows that the lower fragmentation thresholds are observed for cluster ions with the lower predicted stability.

author list (cited authors)

  • Fernandez-Lima, F. A., Becker, C., Gillig, K., Russell, W. K., Nascimento, M., & Russell, D. H.

publication date

  • January 1, 2008 11:11 AM