Photodecomposition of Mo(CO)[sub 6]/Si(111) 7[times]7: CO state-resolved evidence for excited state relaxation and quenching

Journal Article · Mon Aug 15 04:00:00 EDT 1994 · Journal of Chemical Physics; (United States)

DOI:https://doi.org/10.1063/1.467605· OSTI ID:7174055

Chu, P M; Buntin, S A; Richter, L J; Cavanagh, R R ^[1]

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1. 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), Journal Name: Journal of Chemical Physics; (United States) Vol. 101:4; ISSN JCPSA6; ISSN 0021-9606
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400500* -- Photochemistry
CARBON COMPOUNDS
CARBON MONOXIDE
CARBON OXIDES
CARBONYLS
CHALCOGENIDES
COMPLEXES
CROSS SECTIONS
ELECTROMAGNETIC RADIATION
ELEMENTS
ENERGY LEVELS
ENERGY TRANSFER
EXCITED STATES
LAYERS
MOLYBDENUM COMPLEXES
OXIDES
OXYGEN COMPOUNDS
RADIATIONS
RELAXATION
RESOLUTION
SEMIMETALS
SILICON
SUBSTRATES
TEMPERATURE RANGE
TEMPERATURE RANGE 0065-0273 K
TRANSITION ELEMENT COMPLEXES
ULTRAVIOLET RADIATION