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.

Oxamate salts as novel agents for the restoration of marble and limestone substrates: Case study of ammonium N-phenyloxamate / Maiore, Laura; Aragoni, M. Carla; Carcangiu, Gianfranco; Cocco, Ombretta; Isaia, Francesco; Lippolis, Vito; Meloni, Paola; Murru, Arianna; Slawin, Alexandra M. Z.; Tuveri, Enrica; Woollins, J. Derek; Arca, Massimiliano. - In: NEW JOURNAL OF CHEMISTRY. - ISSN 1144-0546. - 40:3(2016), pp. 2768-2774. [10.1039/c5nj02505b]

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

MAIORE, Laura;
2016

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.
Oxamate salts as novel agents for the restoration of marble and limestone substrates: Case study of ammonium N-phenyloxamate / Maiore, Laura; Aragoni, M. Carla; Carcangiu, Gianfranco; Cocco, Ombretta; Isaia, Francesco; Lippolis, Vito; Meloni, Paola; Murru, Arianna; Slawin, Alexandra M. Z.; Tuveri, Enrica; Woollins, J. Derek; Arca, Massimiliano. - In: NEW JOURNAL OF CHEMISTRY. - ISSN 1144-0546. - 40:3(2016), pp. 2768-2774. [10.1039/c5nj02505b]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11388/168339
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