Engineered Si(1 0 0) surfaces for the gas-phase anchoring of metal β-diketonate complexes |
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Authors: | Guglielmo G Condorelli Alessandro Motta Cedric Bedoya Alessandro Di Mauro Giovanna Pellegrino Emanuele Smecca |
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Institution: | Dipartimento di Scienze Chimiche, Università di Catania and INSTM UdR di Catania, V.le A. Doria 6, 95125 Catania, Italy |
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Abstract: | A synthetic strategy for the covalent anchoring of nickel β-diketonate complexes on Si(1 0 0) has been examined. Engineered Si(1 0 0) surfaces were prepared by the Si-grafting of 10-undecylenic acid methyl ester followed by hydrolysis of the ester to free the carboxylic functions suited for the anchoring of the Ni complex. Bis(pentane-2,4-dionate)Ni(II) was bonded to the functionalized surface from the gas phase by the exchange of the acetylacetonate ligand with the grafted acid. The surface density of the anchored Ni complex was controlled by tuning the surface concentration of carboxylic groups adopting a mixed monolayer of undecylenic acid and 1-decene used as a spectator spacer. The nickel decorated silicon surfaces were characterized by attenuate total reflectance infrared absorption spectroscopy (ATR-IRAS) and angle resolved X-ray photoelectron spectroscopy (AR-XPS). |
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Keywords: | SAM Functionalized surfaces Silicon surface Nickel compounds Acetylacetonates X-ray photoelectron spectroscopy |
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