Synthesis, characterization and DFT-modeling of novel agents for the protection and restoration of historical calcareous stone substrates

Journal of Colloid and Interface Science
Laura MaioreMassimiliano Arca

Abstract

The ammonium salts of oxamate (AmOxam) and monomethyloxalate (AmMeox), structurally related to ammonium oxalate (AmOx), were synthesized and characterized as protecting agents/filler for calcareous stone substrates. Both compounds featured an improved solubility in water and alcoholic-water mixtures with respect to AmOx. While AmOxam is stable in aqueous solution and reacts with calcite to afford the corresponding insoluble calcium oxamate (CaOxam), AmMeox spontaneously undergoes hydrolysis to give ammonium monohydrogen oxalate hemihydrate (AmBiox) and calcium oxalate (CaOx). Both compounds have been tested for the restoration of naturally weathered marble and biomicritic limestone. The formation of a superficial layer of CaOxam and CaOx was observed on stone samples treated with AmOxam and AmMeox, respectively, depending on the solvent mixture. A quantum-mechanical study was carried out at DFT level in order to investigate the nature of the interactions occurring between the lithic substrate (calcite) and the passivating agents, showing how the structural modifications on oxalic acid derivatives can be exploited to fine-tune their interaction with the calcite surface.

References

Sep 15, 1988·Physical Review A: General Physics·A D Becke
May 4, 2004·Journal of Colloid and Interface Science·Manlio F Salinas-NolascoPedro Bosch
Apr 26, 2005·Journal of Colloid and Interface Science·Manlio F Salinas-NolascoPedro Bosch
Aug 28, 2010·Langmuir : the ACS Journal of Surfaces and Colloids·D J CookeJ A Elliott
Sep 4, 2010·Langmuir : the ACS Journal of Surfaces and Colloids·K K SandS L S Stipp
Aug 8, 2013·Langmuir : the ACS Journal of Surfaces and Colloids·Carlos Rodriguez-NavarroEncarnacion Ruiz-Agudo

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Citations

Jan 19, 2019·Physical Chemistry Chemical Physics : PCCP·Francisco Colmenero

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