2022/08/02 by Alba Espina, María Vega Cañamares, Z. Jurašeková +1 · 1 citation
Arts and Humanities · Materials Science · Physics and Astronomy · #Cultural Heritage Materials Analysis #Corrosion Behavior and Inhibition #X-ray Spectroscopy and Fluorescence Analysis
paper · doi:10.1021/acsomega.2c01679
openalex publication_date 2022/08/02 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/25
), which are characteristic of the metal complexes. The structural changes of the polyphenol complexes with iron were also investigated at different pHs and different polyphenol/iron stoichiometries. Other effects of the interaction of polyphenols with iron are the pH decrease of the mixture upon metal complexation and fluorescence quenching induced by the interaction of iron. This quenching is important since it facilitates the Raman inspection of manuscripts since polyphenols show a strong fluorescence emission that overlaps the Raman spectrum. Furthermore, DFT calculations were performed for the first time on the gallic acid complex with iron in order to elaborate a detailed assignment of the vibrational modes of polyphenols and their metal complexes, something that was missed in previous applications of Raman to IGIs.