Experimental and theoretical studies of (CsI)n Cs+ cluster ions produced by 355 nm laser desorption ionization.
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.
Fernandez-Lima
F A
FA
Department of Chemistry, Texas A&M University, College Station, Texas 77843, USA.
Becker
C
C
Gillig
K
K
Russell
W K
WK
Nascimento
Marco Antonio Chaer
MA
Russell
D H
DH