Conférence du Dr Alfonso Zoleo "Electron Paramagnetic Resonance on ancient and degraded paper : an overview"

Le Dr. Alfonso Zoleo
Electron Spin-Echo Group, Dept de Chimie, Université de Padova (Italie)

donnera une conférence intitulée:

"Electron Paramagnetic Resonance on ancient and degraded paper: an overview"

le lundi 2 décembre 2013 à 11h00

en Salle de Conférence, CRCC, 36 rue Geoffroy-Saint-Hilaire, Paris 5e

Résumé
EPR (Electron Paramagnetic Resonance) is a spectroscopic technique able to spot and analyze paramagnetic species in samples. Paramagnetic species include radicals and common metal ions like Fe(III), Cu(II), Mn(II), which occur frequently and abundantely in ancient and degraded paper (even blank). We show that these metal ions and radicals give specific indications about degradation and trasformation reactions occurring in paper, suggesting that these ions play a relevant role in paper degradation.