Direct evidence of adsorption induced CrII mobility on the SiO2 surface upon complexation by CO

Diego Gianolio, Elena Groppo, Jenny G. Vitillo, Alessandro Damin, Silvia Bordiga, Adriano Zecchina, Carlo Lamberti

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In situ, temperature dependent, XAFS proved that CrII grafted on SiO2 is extracted from the surface upon CO adsorption at 100 K: ΔRCr-O = +0.08 Å. CO adsorption evolves into two coverage dependent steps: (i) displacement of weak siloxane ligands (non-classical carbonyls); (ii) relaxation of RCr-O surface bond, RCr-CO optimization and transformation into classical carbonyls.

Original languageEnglish (US)
Pages (from-to)976-978
Number of pages3
JournalChemical Communications
Issue number6
StatePublished - 2010


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