Ion-molecule clustering thermochemistry by laser ionization high-pressure mass spectrometry

M. Samy El-Shall, Kenneth E. Schriver, Robert L. Whetten, M. Meot-Ner

Research output: Contribution to journalArticlepeer-review

32 Scopus citations


A laser ionization source has been developed and applied to measure the equilibrium thermochemistry of the clustering of neutral molecules with atomic metal ions. This high-pressure mass spectrometric method enables cluster association reactions to be studied at pressures that ensure both atomic ion thermalization and collisional stabilization of the nascent cluster ions. Initial application to the thermochemical properties of the association reactions of Cu+ with Kr, N2 (up to five molecules), H2O, CH3OH, and CH3COCH3 is described. The binding energies for Cu+·Kr and Cu+·N2 are similar to the analogous Na+ complexes, as expected from predominantly electrostatic interactions. The binding energies show reasonable variations with the proton affinity of the molecule.

Original languageEnglish (US)
Pages (from-to)7969-7973
Number of pages5
JournalJournal of physical chemistry
Issue number24
StatePublished - 1989
Externally publishedYes

ASJC Scopus subject areas

  • General Engineering
  • Physical and Theoretical Chemistry


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