Silicon‐Assisted Direct Covalent Grafting on Metal Oxide Surfaces: Synthesis and Characterization of Carboxylate N,N′‐Ligands on TiO2

作者: Henri Arzoumanian , Nelson J. Castellanos , Fernando O. Martínez , Edgar A. Páez-Mozo , Fabio Ziarelli

DOI: 10.1002/EJIC.200901092

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摘要: The easy covalent bonding of an OH-bearing molecule onto a metal oxide surface can be done by transesterifying trimethylsilylated hydroxy function with the OH groups. This results in grafting organic directly on matrix, accompanied formation trimethylsilanol, which easily eliminated as volatile hexamethyldisiloxane and water. was accomplished TiO 2 matrix three carboxylic acids: acetic, isonicotinic, 2,2'-bipyridyl-4,4'-dicarboxylic acids. N,N'-immobilized ligand then used for dioxidomolybdenum entity tested such at room temperature under atmospheric pressure O oxidation ethylbenzene. All intermediates grafted species were fully characterized 13 CMAS NMR spectroscopy, thermogravimetric elemental analysis.

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