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

doi:10.1039/b920681g

Direct evidence of adsorption induced Cr^II mobility on the SiO₂ surface upon complexation by CO

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

Chemistry (Twin Cities)

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56 Scopus citations

Abstract

In situ, temperature dependent, XAFS proved that Cr^II grafted on SiO₂ is extracted from the surface upon CO adsorption at 100 K: ΔR_Cr-O = +0.08 Å. 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.

Original language	English (US)
Pages (from-to)	976-978
Number of pages	3
Journal	Chemical Communications
Volume	46
Issue number	6
DOIs	https://doi.org/10.1039/b920681g
State	Published - 2010

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abstract = "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 {\AA}. 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.",

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T1 - Direct evidence of adsorption induced CrII mobility on the SiO2 surface upon complexation by CO

AU - Gianolio, Diego

AU - Groppo, Elena

AU - Vitillo, Jenny G.

AU - Damin, Alessandro

AU - Bordiga, Silvia

AU - Zecchina, Adriano

AU - Lamberti, Carlo

PY - 2010

Y1 - 2010

N2 - 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.

AB - 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.

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JO - Chemical Communications

JF - Chemical Communications

IS - 6

ER -

Direct evidence of adsorption induced Cr^II mobility on the SiO₂ surface upon complexation by CO

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