A Silica-Supported Double-Decker Silsesquioxane Provides a Second Skin for the Selective Generation of Bipodal Surface Organometallic Complexes

A well-defined silica-based material with a homogeneous nanolayer presenting identical pairs of vicinal silanols has been prepared by reaction of the surface organometallic species [SiOZr(CH2CMe3)3], obtained on a silica dehydroxylated at 900 °C, with the double-decker-shaped silsesquioxane (OH)2DD...

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Veröffentlicht in:Organometallics 2012-11, Vol.31 (21), p.7610-7617
Hauptverfasser: Espinas, Jeff, Pelletier, Jérémie D. A, Abou-Hamad, Edy, Emsley, Lyndon, Basset, Jean-Marie
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Sprache:eng
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Zusammenfassung:A well-defined silica-based material with a homogeneous nanolayer presenting identical pairs of vicinal silanols has been prepared by reaction of the surface organometallic species [SiOZr(CH2CMe3)3], obtained on a silica dehydroxylated at 900 °C, with the double-decker-shaped silsesquioxane (OH)2DD(OH)2. The surface structure has been established using extensive NMR characterization (1H, 13C, 29Si, HETCOR, double-quantum, triple-quantum). Treatment with Zr(CH2CMe3)4 leads to the first well-defined single-site bipodal grafted bis-neopentyl zirconium complex.
ISSN:0276-7333
1520-6041
DOI:10.1021/om300918v