The long range ordered p(2 × 2) self-assembled monolayer formed by dosing 2-mercaptobenzoxazole (MBO, C7H5NOS) on the Cu(1 0 0) 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(1 0 0) 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 σ*(S–C) resonance, corresponding to the transition from the S 1s core level to the σ*(S–C) antibonding molecular state. The angular dependence of the σ*(S–C) resonance intensity clearly indicates that the S–C axis is nearly perpendicular to the surface (13° ± 13°), confirming the major role of S in bonding to the surface, and the influence of the π–π interaction between the molecules in driving the almost upright position at saturation coverage.

Molecular orientation of 2-mercaptobenzoxazole adsorbed on Cu(1 0 0) surface / Bussolotti, F.; D'Addato, Sergio; Allegretti, F.; Dhanak, V.; Mariani, C.. - In: SURFACE SCIENCE. - ISSN 0039-6028. - STAMPA. - 578:1-3(2005), pp. 136-141. [10.1016/j.susc.2005.01.023]

Molecular orientation of 2-mercaptobenzoxazole adsorbed on Cu(1 0 0) surface

D'ADDATO, Sergio;
2005

Abstract

The long range ordered p(2 × 2) self-assembled monolayer formed by dosing 2-mercaptobenzoxazole (MBO, C7H5NOS) on the Cu(1 0 0) 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(1 0 0) 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 σ*(S–C) resonance, corresponding to the transition from the S 1s core level to the σ*(S–C) antibonding molecular state. The angular dependence of the σ*(S–C) resonance intensity clearly indicates that the S–C axis is nearly perpendicular to the surface (13° ± 13°), confirming the major role of S in bonding to the surface, and the influence of the π–π interaction between the molecules in driving the almost upright position at saturation coverage.
2005
578
1-3
136
141
Molecular orientation of 2-mercaptobenzoxazole adsorbed on Cu(1 0 0) surface / Bussolotti, F.; D'Addato, Sergio; Allegretti, F.; Dhanak, V.; Mariani, C.. - In: SURFACE SCIENCE. - ISSN 0039-6028. - STAMPA. - 578:1-3(2005), pp. 136-141. [10.1016/j.susc.2005.01.023]
Bussolotti, F.; D'Addato, Sergio; Allegretti, F.; Dhanak, V.; Mariani, C.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11380/451108
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