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THE LOCAL ADSORPTION STRUCTURE OF ACETYLENE ON CU(111)
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UNSPECIFIED (1993) THE LOCAL ADSORPTION STRUCTURE OF ACETYLENE ON CU(111). Surface Science, 291 (3). pp. 295-308. ISSN 0039-6028.
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Abstract
A quantitative structural study of the adsorption of acetylene on Cu(111) has been carried out by scanned energy mode photoelectron diffraction from the C ls core levels. The molecule is found to be adsorbed with the C-C axis almost parallel to the surface with the carbon atoms occupying the two symmetrically distinct three-fold coordinated hollow sites on the surface. The C to top Cu atom layer spacing appears to be slightly smaller (1.38 +/- 0.03 angstrom) above the ''fcc'' hollow site (above a third-layer Cu atom) than above the ''hcp'' hollow site (1.44 +/- 0.03 angstrom). The best fit to theory is obtained with the C atoms exactly in the three-fold symmetric sites of the substrate which constrains the C-C bondlength to a value (1.48 +/- 0.10 angstrom) substantially larger than that of the free molecule. This result is consistent with previously published vibrational spectroscopy from this adsorption system which indicates significant lowering of the C-C bond order.
Item Type: | Journal Article | ||||
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Subjects: | Q Science > QD Chemistry Q Science > QC Physics |
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Journal or Publication Title: | Surface Science | ||||
Publisher: | ELSEVIER SCIENCE BV | ||||
ISSN: | 0039-6028 | ||||
Official Date: | 10 July 1993 | ||||
Dates: |
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Volume: | 291 | ||||
Number: | 3 | ||||
Number of Pages: | 14 | ||||
Page Range: | pp. 295-308 | ||||
Publication Status: | Published |
Data sourced from Thomson Reuters' Web of Knowledge
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