Ion Pickup of Large, Surface-Adsorbed Molecules: A Demonstration of the Eley-Rideal Mechanism

E. R. Williams, G. C. Jones, L. Fang, R. N. Zare, B. J. Garrison, D. W. Brenner

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Abstract

Surface collisions of polycyclic aromatic hydrocarbon ions can be made to produce abundant pickup of large, surface-adsorbed species in a tandem time-of-flight mass spectrometer. Attachment of C1Hn-C6Hn to naphthalene and phenanthrene ions occurs with collision energies between 40 and 160 eV. Formation efficiency for these ion-adsorbate attachment reactions can be as high as 0.8%. Surface collisions produce no measurable shift in our flight times nor distortion in peak shapes for these species; this indicates the reaction time on the surface must be less than 160 ns. Theoretical calculations show that these reactions are direct (<100 fs residence on the surface) and thus proceed by an Eley-Rideal mechanism.

Original languageEnglish (US)
Pages (from-to)3207-3210
Number of pages4
JournalJournal of the American Chemical Society
Volume114
Issue number9
DOIs
StatePublished - Apr 1 1992

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All Science Journal Classification (ASJC) codes

  • Catalysis
  • Chemistry(all)
  • Biochemistry
  • Colloid and Surface Chemistry

Cite this

Williams, E. R., Jones, G. C., Fang, L., Zare, R. N., Garrison, B. J., & Brenner, D. W. (1992). Ion Pickup of Large, Surface-Adsorbed Molecules: A Demonstration of the Eley-Rideal Mechanism. Journal of the American Chemical Society, 114(9), 3207-3210. https://doi.org/10.1021/ja00035a006