Abstract
The authors report the observation of dissociation resulting from irradiation of Fe(CO)/sub 5/ deposited onto single crystal Al/sub 2/O/sub 3/, Si(100), and Ag(110) surfaces in ultrahigh vacuum. Photolytic effects are observed without competition from laser-induced heating of the substrate. Decomposition is measured by mass spectrometric detection of the CO released from the surface. The postulated mechanism involves the direct absorption of 337-nm radiation by the physisorbed Fe(CO)/sub 5/ and subsequent fast dissociation. The Fe-containing photoproducts remain on the surface, although they are not identified. The dissociation yield is very similar for Fe(CO)/sub 5/ and Al/sub 2/O/sub 3/ and Ag(110) surfaces, which indicates that the rate of photofragmentation is competitive with energy transfer to the surface for each of the three substrates. Also, an annealing process, which results in a short initial burst of Fe(CO)/sub 5/ from the surface, is observed.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.