Phosphonium-based ionic liquids as antifungal agents for conservation of heritage sandstone

Abstract

With a view to preventing fungal deterioration of historical stone artworks, we report the use of phosphonium-based ionic liquids (ILs) as potent antifungal agents against dematiaceous fungi commonly found on heritage stones.

Anti Gram-Positive Bacteria Activity of Synthetic Quaternary Ammonium Lipid and Its Precursor Phosphonium Salt

“…Particularly, in the FTIR spectrum, it was observable the strong and sharp band of the free OH stretching (3273 cm −1 ), the weak bands of the phenyls C-H stretching (3043 and 3015 cm −1 ), while the strong bands of the symmetric and asymmetric stretching of C–H of the several methylene groups of the alkyl chain were observable at 2923 and 2851 cm −1 , respectively [ 28 ]. The C-H banding of the methylene groups was detected at 1463 cm −1 , while the band around 1467 cm −1 could be due both to the stretching of aromatic C–C bonds and to the P-CH 2 vibration [ 29 ]. The aromatic part of the prepared phosphonium salt was also confirmed by bands at 1482 and 1626 cm −1 (stretching vibrations of aromatic C=C bonds in the phenyl group) [ 28 ], and by the characteristic overtones in the range 1700–2000 cm −1 .…”