A Novel Approach to Prepare Well-Defined Silica-Supported Polyoxometalate Species by Reaction with a Chlorinated Support. (22nd August 2013)

• Record Type: Journal Article
• Authors: Grinenval, Eva; Basset, Jean-Marie; Lefebvre, Frédéric
• Other Names: Guillon Emmanuel Academic Editor.
• Is Part Of: Journal of inorganic chemistry. Volume 2013(2013)
• Publication Date: 2013-08-22
• Subjects: Chemistry, Inorganic -- Periodicals; Chemistry, Inorganic; Periodicals; 546
• DOI: 10.1155/2013/902192
• Languages: English
• ISSNs: 2356-7457

Abstract

Abstract : Polyoxometalates were grafted covalently on SBA-15 by a two-step procedure. The dehydroxylated mesoporous silica was first modified by reaction with methyltrichlorosilane in presence of triethylamine. The resulting solid was fully characterized and contained a mixture of mono- and digrafted species ( ≡ Si–O ) n SiMeCl 3 - n . These surface Si–Cl bonds can react with lacunary polyoxometalates as in solution, yielding to a ≡ Si–O–POM linkage. However, solid state MAS NMR shows that only the digrafted species react with the polyoxometalate. This new grafting method opens the way to the synthesis of a new class of catalysts which could operate in solution without leaching.