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Molecular orientation of 2-mercaptobenzoxazole adsorbed on Cu(100) surface
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UNSPECIFIED (2005) Molecular orientation of 2-mercaptobenzoxazole adsorbed on Cu(100) surface. Surface Science, 578 (1-3). pp. 136-141. doi:10.1016/j.susc.2005.01.023 ISSN 0039-6028.
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Official URL: http://dx.doi.org/10.1016/j.susc.2005.01.023
Abstract
The long range ordered p(2x2) self-assembled monolayer formed by dosing 2-mercaptobenzoxazole (MBO, C7H5NOS) on the Cu(100) surface at room temperature has been investigated by means of near edge X-ray adsorption fine structure (NEXAFS) technique at the sulphur K-edge. NEXAFS S-K-edge spectra have been recorded at different incident photon angles with respect to the Cu(100) surface, using linearly polarised synchrotron radiation. A clear spectral feature has been observed close to the absorption edge, with higher intensity at grazing incidence, assigned to the sigma*(S-C) resonance, corresponding to the transition from the S Is core level to the sigma*(S-C) antibonding molecular state. The angular dependence of the sigma*(S-C) resonance intensity clearly indicates that the S-C axis is nearly perpendicular to the surface (13 degrees +/- 13 degrees), confirming the major role of S in bonding to the surface, and the influence of the pi-pi interaction between the molecules in driving the almost upright position at saturation coverage. (c) 2005 Elsevier B.V. All rights reserved.
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 March 2005 | ||||
Dates: |
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Volume: | 578 | ||||
Number: | 1-3 | ||||
Number of Pages: | 6 | ||||
Page Range: | pp. 136-141 | ||||
DOI: | 10.1016/j.susc.2005.01.023 | ||||
Publication Status: | Published |
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