Effect of zirconium-based conversion treatments of zinc, aluminium and magnesium on the chemisorption of ester-functionalized molecules

L. I. Fockaert, S. Pletincx, B. Boelen, T. Hauffman, H. Terryn, J. M.C. Mol

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Abstract

The effect of zirconium-based conversion of thermally vaporized zinc, aluminium and magnesium on the chemisorption of dimethylsuccinate was studied using attenuated total reflection – Fourier transform infrared spectroscopy (ATR-FTIR) and X-ray photoelectron spectroscopy (XPS) analysis. Two competing chemisorption mechanisms contribute to interfacial bond formation. Hydrogen interactions on one hand were shown to occur between metal hydroxides and non-hydrolysed ester-groups of the molecule. On the other hand, both native and zirconium-treated substrates were shown to form interfacial carboxylate bonds with dimethylsuccinate, evidencing their capability of hydrolysing ester groups towards more reactive acid groups. Both interactions were shown to correlate to the metal oxide acid-base properties.

Original languageEnglish
Article number145199
Number of pages11
JournalApplied Surface Science
Volume508
DOIs
Publication statusPublished - 2020

Keywords

  • ATR-FTIR Kretschmann
  • Esters
  • Metal-molecule interaction
  • XPS
  • Zr-based conversion

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