Photodecomposition of Mo(CO)[sub 6]/Si(111) 7[times]7: CO state-resolved evidence for excited state relaxation and quenching
- National Institute of Standards and Technology, Gaithersburg, Maryland 20899 (United States)
State-resolved detection techniques have been used to characterize the ultraviolet photodecomposition dynamics of Mo(CO)[sub 6] on Si(111) 7[times]7 at 100 K. Details of the excitation/fragmentation mechanism including adsorbate energy transfer were examined by measuring the cross sections and the internal and translational energies of the photoejected CO from submonolayer through multilayer coverage regimes. The CO energy distributions are found to be independent of Mo(CO)[sub 6] coverage, and can be characterized by two components with markedly different mean energies. In contrast to the coverage independence of the measured energy disposal, the cross section was found to decrease by a factor of 3 from multilayer coverages to submonolayer coverages.
- DOE Contract Number:
- AI02-93ER14330
- OSTI ID:
- 7174055
- Journal Information:
- Journal of Chemical Physics; (United States), Vol. 101:4; ISSN 0021-9606
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
CARBON MONOXIDE
EXCITED STATES
MOLYBDENUM COMPLEXES
CARBONYLS
CROSS SECTIONS
ENERGY TRANSFER
LAYERS
RELAXATION
RESOLUTION
SILICON
SUBSTRATES
TEMPERATURE RANGE 0065-0273 K
ULTRAVIOLET RADIATION
CARBON COMPOUNDS
CARBON OXIDES
CHALCOGENIDES
COMPLEXES
ELECTROMAGNETIC RADIATION
ELEMENTS
ENERGY LEVELS
OXIDES
OXYGEN COMPOUNDS
RADIATIONS
SEMIMETALS
TEMPERATURE RANGE
TRANSITION ELEMENT COMPLEXES
400500* - Photochemistry