Probing molecular orientation in corrosion inhibition via a NEXAFS study of benzotriazole and related molecules on Cu(100)

J. F. Walsh, H. S. Dhariwal, A. Gutiérrez-Sosa, P. Finetti, C. A. Muryn, N. B. Brookes, R. J. Oldman, G. Thornton

    Research output: Contribution to journalArticlepeer-review

    Abstract

    The orientation of benzotriazole on Cu(100) has been studied using near-edge X-ray absorption fine structure (NEXAFS) at the C and N K-edges. At submonolayer coverage, benzotriazole (C6H5N3) is found to adsorb with the molecular plane close to perpendicular to the Cu(100) surface, as indicated by the polarization dependence of the π* features. The orientation of benzimidazole (C7H6N2) and 1-methyl benzotriazole (C7H7N3) on Cu(100) have also been studied, and are found not to be oriented at submonolayer coverage. This, along with the orientation at multilayer coverage suggests a specific first-bonding-layer origin for the corrosion inhibitor properties of benzotriazole.

    Original languageEnglish
    Pages (from-to)423-432
    Number of pages10
    JournalSurface Science
    Volume415
    Issue number3
    DOIs
    Publication statusPublished - 9 Oct 1998

    Keywords

    • 1-Methyl benzotriazole
    • Benzimidazole
    • Benzotriazole
    • Chemisorption
    • Copper
    • Corrosion
    • Near edge extended X-ray fine structure (NEXAFS)

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