Publication
Title
Reaction of with trichlorosilylated silica gel : a study of the reaction mechanism as a function of temperature
Author
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.
Language
English
Source (journal)
Journal of the Chemical Society: Faraday transactions: physical chemistry and chemical physics / Chemical Society [Londen] - London
Journal of the Chemical Society: Faraday transactions
Publication
London : 1993
ISSN
0956-5000
Volume/pages
89:14(1993), p. 2509-2513
ISI
A1993LN92600030
Full text (Publisher's DOI)
UAntwerpen
Faculty/Department
Research group
Publication type
Subject
Affiliation
Publications with a UAntwerp address
External links
Web of Science
Record
Identification
Creation 19.07.2012
Last edited 28.07.2017
To cite this reference