Title Reaction of $NH_{3}$ with trichlorosilylated silica gel : a study of the reaction mechanism as a function of temperatureReaction of $NH_{3}$ with trichlorosilylated silica gel : a study of the reaction mechanism as a function of temperature Author Van Der Voort, P. Vrancken, K.C. Vansant, E.F. Riga, J. Faculty/Department Faculty of Sciences. Chemistry Faculty of Sciences. Bioscience Engineering Research group Department of Chemistry Laboratory of adsorption and catalysis Publication type article Publication 1993London, 1993 Subject Physics Chemistry Source (journal) Journal of the Chemical Society: Faraday transactions Journal of the Chemical Society: Faraday transactions: physical chemistry and chemical physics / Chemical Society [London] - London Volume/pages 89(1993):14, p. 2509-2513 ISSN 0956-5000 ISI A1993LN92600030 Carrier E Target language English (eng) Full text (Publishers DOI) Affiliation University of Antwerp Abstract Activation of the silica substrate with chlorosilanes increases the ammonia uptake by a factor of 5-10, compared with untreated silica. The reaction mechanism of ammonia with trichlorosilylated silica gel is examined in detail. Physisorbed NH4Cl causes a shift in the Si-NH2 stretching vibrations. Several side reactions occur during the chlorosilylation step, the ammoniation step and the thermal treatment of the reacted sample. Amine functions subsequently convert to silazanes and eventually nitrides. A novel mechanism for silazane formation is proposed. The different species on the silica surface are quantified as a function of the reaction temperature. E-info http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:A1993LN92600030&DestLinkType=RelatedRecords&DestApp=ALL_WOS&UsrCustomerID=ef845e08c439e550330acc77c7d2d848 http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:A1993LN92600030&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=ef845e08c439e550330acc77c7d2d848 http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:A1993LN92600030&DestLinkType=CitingArticles&DestApp=ALL_WOS&UsrCustomerID=ef845e08c439e550330acc77c7d2d848 Handle