Oxamate salts as novel agents for the restoration of marble and limestone substrates: case study of ammonium N-phenyloxamate

Laura Maiore, M. Carla Aragoni, Gianfranco Carcangiu, Ombretta Cocco, Francesco Isaia, Vito Lippolis, Paola Meloni, Arianna Murru, Alexandra Martha Zoya Slawin, Enrica Tuveri, J Derek Woollins, Massimiliano Arca

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)

Abstract

The ammonium salt of N-phenyloxamic acid (AmPhOxam) was synthesised, characterised by FT-IR, FT-Raman, UV-Vis, 1H-NMR spectroscopic methods and single crystal X-ray diffraction, and evaluated as a protective and consolidating agent for calcareous stone substrates under mild conditions. Hydro-alcoholic solutions of AmPhOxam were tested for the treatment of naturally weathered white marble and biomicritic limestone. Mercury intrusion porosimetry, FT-NIR spectroscopy measurements and SEM microscopy showed the formation of a superficial protective layer of crystals of the corresponding monohydrated calcium salt, CaPhOxam, on both treated stones.
Original languageEnglish
Pages (from-to)2768-2774
JournalNew Journal of Chemistry
Volume40
Issue number3
DOIs
Publication statusPublished - 1 Mar 2016

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