Polyoxometallat‐ionische Flüssigkeiten (POM‐ILs) als Antikorrosions‐ und antibakterielle Beschichtung für Natursteine

Abstract

Corrosion of stone by acid rain and deterioration from biofilms are global problems for industrial and residential buildings as well as cultural heritage such as statues or historic buildings. Here we show how typical building stones can be protected from corrosion ("weathering") and biofilm formation ("biodeterioration") by application of thin films of polyoxometalate-based ionic liquids (POM-ILs). Stone samples are coated with hydrophobic, acid resistant POM-ILs featuring biocidal properties. Exposure of the samples to simulated acid rain showed negligible corrosion compared to the significant deterioration of unprotected samples; while the biocidal properties of the POM-ILs suppress the formation of biofilms on coated stone slabs. A new class of modular molecular materials for protecting stones can now be developed for use in construction, environmental protection and cultural heritage preservation.

Mechanistically Driven Control over Cubane Oxo Cluster Catalysts

“…Polynuclear transition metal-oxo complexes and polyoxometalates are prominent targets in current catalytic, bio-inorganic, medicinal and materials research. [4][5][6] Their wide application range encompasses, for example, catalytic water splitting, [7][8][9][10][11][12] new antimicrobial agents 13 and single molecule magnets. 14 However, they also embody the present challenges of predictive coordination chemistry, because the formation pathways of most polynuclear transition metal oxo clusters remain widely unknown.…”