Structure determination of ammonia on Cu(111)
UNSPECIFIED (2000) Structure determination of ammonia on Cu(111). JOURNAL OF PHYSICAL CHEMISTRY B, 104 (14). pp. 3044-3049. ISSN 1089-5647Full text not available from this repository.
The local structure of ammonia adsorbed on Cu(lll) has been determined using N Is scanned-energy-mode photoelectron diffraction. The molecule is found to occupy an atop bonding site with a Cu-N bond length of 2.09 +/- 0.03 Angstrom, but with large amplitude vibrations of the molecule parallel to the surface, consistent with a systematic trend found in our studies of species adsorbed in atop sites. We find no evidence for a significant static offset of the molecule from the atop site (which was found on the lower-symmetry Cu(110) surface), but a small offset of this kind cannot be distinguished from the effects of the large dynamic displacement. As a first test for this photoelectron diffraction technique we have also investigated the effect of including the weakly scattering H atoms in the analysis. This does lead to preferred sites for the H atoms consistent with expectations, but their precision of location is too poor to provide information of chemical significance.
|Item Type:||Journal Article|
|Subjects:||Q Science > QD Chemistry|
|Journal or Publication Title:||JOURNAL OF PHYSICAL CHEMISTRY B|
|Publisher:||AMER CHEMICAL SOC|
|Date:||13 April 2000|
|Number of Pages:||6|
|Page Range:||pp. 3044-3049|
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