Molecular growth pathways in silica sol-gel polymerization
Ramamurthi, Sangeeta Dikshit
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https://hdl.handle.net/2142/19234
Description
Title
Molecular growth pathways in silica sol-gel polymerization
Author(s)
Ramamurthi, Sangeeta Dikshit
Issue Date
1989
Doctoral Committee Chair(s)
Klemperer, Walter G.
Department of Study
Chemistry
Discipline
Chemistry
Degree Granting Institution
University of Illinois at Urbana-Champaign
Degree Name
Ph.D.
Degree Level
Dissertation
Keyword(s)
Chemistry, Inorganic
Language
eng
Abstract
An analytical protocol involving gas chromatography (GC), gas chromatography-mass spectrometry (GCMS), and 29Si{1H} NMR spectroscopy, was developed to determine the structures of the polysilicate intermediates formed during silica sol-gel polymerization. This protocol allowed the structural identification of mono- through hexasilicate species (1
The analytical protocol employing capillary gas
chromatography was applied to monitor the stoichiometry,
structures, and abundances of low molecular weight polysilcates (l
A procedure was also developed to prepare monolithic silica glasses from mono-, tri-, and octasilicate precursors, under acidic (HCl) and basic (KOH) conditions. Bulk density measurements of these monoliths indicated that the octasilicate monoliths were relatively dense.
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