Charge-transfer photodissociation of adsorbed molecules via electron image states

Journal Article · Mon Jan 28 00:00:00 EST 2008 · Journal of Chemical Physics

DOI:https://doi.org/10.1063/1.2822331· OSTI ID:21024692

Jensen, E T ^[1]

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1. Physics Department, University of Northern British Columbia, 3333 University Way, Prince George, British Columbia V2N 4Z9 (Canada)

The 248 and 193 nm photodissociations of submonolayer quantities of CH{sub 3}Br and CH{sub 3}I adsorbed on thin layers of n-hexane indicate that the dissociation is caused by dissociative electron attachment from subvacuum level photoelectrons created in the copper substrate. The characteristics of this photodissociation-translation energy distributions and coverage dependences show that the dissociation is mediated by an image potential state which temporarily traps the photoelectrons near the n-hexane-vacuum interface, and then the charge transfers from this image state to the affinity level of a coadsorbed halomethane which then dissociates.

• OSTI ID: 21024692
• Journal Information: Journal of Chemical Physics, Vol. 128, Issue 4; Other Information: DOI: 10.1063/1.2822331; (c) 2008 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0021-9606
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
ADSORPTION
AFFINITY
CHARGE EXCHANGE
COPPER
DISSOCIATION
ELECTRON ATTACHMENT
ELECTRONS
ENERGY SPECTRA
HEXANE
METHYL BROMIDE
METHYL IODIDE
PHOTOLYSIS
SURFACES
THIN FILMS