title: Direct evidence of adsorption induced Cr(II) mobility on the SiO(2) surface upon complexation by CO.
abstract: In situ, temperature dependent, XAFS proved that Cr(II) grafted on SiO(2) is extracted from the surface upon CO adsorption at 100 K: DeltaR(Cr-O) = +0.08 A. CO adsorption evolves into two coverage dependent steps: (i) displacement of weak siloxane ligands (non-classical carbonyls); (ii) relaxation of R(Cr-O) surface bond, R(Cr-CO) optimization and transformation into classical carbonyls.
authors.affiliation: Department of Inorganic, Physical and Materials Chemistry, INSTM Centro di Riferimento and NIS Centre of Excellence, Università di Torino, Via P. Giuria 7, 10125 Torino, Italy.
authors.forename: Diego
authors.initials: D
authors.lastname: Gianolio
authors.forename: Elena
authors.initials: E
authors.lastname: Groppo
authors.forename: Jenny G
authors.initials: JG
authors.lastname: Vitillo
authors.forename: Alessandro
authors.initials: A
authors.lastname: Damin
authors.forename: Silvia
authors.initials: S
authors.lastname: Bordiga
authors.forename: Adriano
authors.initials: A
authors.lastname: Zecchina
authors.forename: Carlo
authors.initials: C
authors.lastname: Lamberti