A study of the chemisorption of a series of aminophenols on plasma-grown aluminium and magnesium oxides by IETS |
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| Affiliation: | 1. The Child Psychiatry Unit, Edmond and Lily Safra Children''s Hospital, Sheba Medical Center, Tel Hashomer, Ramat-Gan, Israel;2. Sackler Faculty of Medicine, Tel Aviv University, Israel;3. Department of Psychology, The Interdisciplinary Center, Herzliya, Israel;1. Department of Psychiatry, First Affiliated Hospital of Kunming Medical University, No. 295 Xichang RD, Kunming 650032, Kunming, Yunnan, China;2. Department of Rheumatology and Immunology, First Affiliated Hospital of Kunming Medical Unversity, Kunming, Yunnan, China;3. Imaging Center, First Affiliated Hospital of Kunming Medical University, Kunming, Yunnan, China;1. Section of Genetics, International Agency for Research on Cancer (IARC-WHO), Lyon, France;2. Department of Pathology, Centre Léon Bérard (CLB), Lyon, France;3. Division of Thoracic Surgery, Brigham and Women''s Hospital and Harvard Medical School, Boston, MA, USA;4. Translational Research and Innovation Platform, Cancer Research Centre of Lyon (CRCL), Lyon, France;5. Pathology Institute, Hospices Civils de Lyon, University Claude Bernard Lyon 1, France;6. Caen University Hospital, CHU Caen, Caen, France;7. Paris Centre University Hospital, Paris, France;8. Centre Hospitalier Intercommunal Créteil, Créteil, Paris, France;9. Lille University Hospital, Lille, France;10. Nancy University Hospital, Nancy, France;11. Nantes University Hospital, Nantes, France;12. Nice University Hospital, Nice, France;13. Marie Lannelongue Hospital, Le Plessis Robinson, France;14. Toulouse University Hospital, Toulouse, France;15. Bordeaux University Hospital, Bordeaux, France;p. Department of Medical Oncology, Centre Léon Bérard (CLB), Lyon, France;q. European Reference Network (ENR-EURACAN), France;r. University Grenoble Alpes, Grenoble, France;s. Department of Immunity, Virus, and Inflammation, Cancer Research Centre of Lyon (CRCL), Lyon, France;t. University Lyon 1, Lyon, France;u. INSERM U932, Paris, France;v. Institut Curie, Paris, France |
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| Abstract: | Inelastic electron tunnelling spectroscopy (IETS) has been applied to study the adsorption of a series of aminophenols on plasma-grown aluminium and magnesium oxides. Vapour-phase doping of these surfaces was used and spectra recorded for 1,2-aminophenol, 1,3-aminophenol and 1,4-aminophenol. The tunnel spectra of the 1,2- and 1,3-aminophenols show that their chemisorption at both oxide surfaces is via reaction between phenolic and surface hydroxyl groups. For the 1,4-aminophenol example, adsorbate chemisorption involves transfer of surface-bound protons from the oxide in amino-group protonation. Some of these protons are replaced by deprotonation of the phenol at surface oxide ions. Observed band intensities for all three systems on aluminium oxide are held to be indicative of an adsorbate orientation on the surface which is close to the vertical. In contrast, those for magnesium oxide are more consistent with a non-vertical configuration. |
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