Ion pickup of large, surface-adsorbed molecules: a demonstration of the Eley-Rideal mechanism

Autor:	Liling. Fang, D. W. Brenner, B. J. Garrison, Glenn C. Jones, Richard N. Zare, Evan R. Williams
Rok vydání:	1992
Předmět:	Chemistry Polyatomic ion Analytical chemistry General Chemistry Photochemistry Mass spectrometry Biochemistry Catalysis Dissociation (chemistry) law.invention Ion Colloid and Surface Chemistry Adsorption Fragmentation (mass spectrometry) Reflectron law Molecule
Zdroj:	Journal of the American Chemical Society. 114:3207-3210
ISSN:	1520-5126 0002-7863
DOI:	10.1021/ja00035a006
Popis:	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 ClH,-C6H, to naphthalene and phenanthrene ions occurs with collision energies between 40 and 160 eV. Formation efficiency for these ionadsorbate 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 (
Databáze:	OpenAIRE
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