Adsorption and reaction of [Re[sub 2](CO)[sub 10]] on ultrathin MgO films grown on a Mo(110) surface. Characterization by infrared reflection-absorption spectroscopy and temperature-programmed desorption

Journal Article · Thu Apr 14 04:00:00 EDT 1994 · Journal of Physical Chemistry; (United States)

DOI:https://doi.org/10.1021/j100066a028· OSTI ID:7019603

Purnell, S K; Gates, B C ^[1]; Xu, X; Goodman, D W ^[2]

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1. Univ. of California, Davis, CA (United States)
2. Texas A M Univ., College Station, TX (United States)

The decarbonylation of [Re[sub 2](CO)[sub 10]] on ultrathin MgO(111) films (approximately 50 A) grown on a Mo(110) substrate was investigated with infrared reflection-absorption spectroscopy and temperature-programmed desorption/decomposition. When [Re[sub 2](CO)[sub 10]] was adsorbed at 320 K, it reacted with the MgO(111) surface, forming a rhenium subcarbonyl, [Re(CO)[sub 4](OMg)][sub 2], where (OMg) represents oxygen on the MgO(111) surface. Upon heating to temperatures >400 K, [Re(CO)[sub 4](OMg)][sub 2] was decarbonylated, forming [Re(CO)[sub 3](OMg)[sub 3]]. Further heating to temperatures >600 K induced the formation of rhenium metal clusters. When it was adsorbed at 110 K, [Rc[sub 2](CO)[sub 10]] condensed on MgO(111), with a fraction of the first layer decomposing to form [Re-(CO)[sub 4](OMg)][sub 2]. In temperature-programmed desorption experiments, [Re[sub 2](CO)[sub 10]] multilayers desorbed at 295 K. An unidentified rhenium carbonyl species, probably rhenium pentacarbonyl, desorbed at 350 K. The CO stretching frequencies of the rhenium subcarbonyls were dependent on the coadsorption of water. The infrared spectra show that the symmetry of the surface-bound rhenium tricarbonyls is C[sub 30]. 19 refs., 7 figs., 1 tab.

• DOE Contract Number: FG05-88ER13954; FG02-87ER13790
• OSTI ID: 7019603
• Journal Information: Journal of Physical Chemistry; (United States), Journal Name: Journal of Physical Chemistry; (United States) Vol. 98:15; ISSN JPCHAX; ISSN 0022-3654
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400102 -- Chemical & Spectral Procedures
400201* -- Chemical & Physicochemical Properties
ABSORPTION SPECTRA
ADSORPTION
ALKALINE EARTH METAL COMPOUNDS
CARBONYLS
CATALYST SUPPORTS
CATALYSTS
CHALCOGENIDES
CHEMICAL REACTIONS
COMPLEXES
DECOMPOSITION
DESORPTION
ELEMENTS
FILMS
HYDROGEN COMPOUNDS
INFRARED SPECTRA
INTERFACES
MAGNESIUM COMPOUNDS
MAGNESIUM OXIDES
METALS
MOLYBDENUM
OXIDES
OXYGEN COMPOUNDS
RHENIUM COMPLEXES
SOLID CLUSTERS
SORPTION
SPECTRA
SURFACE PROPERTIES
TEMPERATURE DEPENDENCE
TEMPERATURE RANGE
TEMPERATURE RANGE 0273-0400 K
TEMPERATURE RANGE 0400-1000 K
THIN FILMS
TRANSITION ELEMENT COMPLEXES
TRANSITION ELEMENTS
WATER