SOL-GEL PRECURSORS - A SPECTROSCOPIC STUDY OF TRANSESTERIFICATION REACTIONS BETWEEN SILICON AND TITANIUM ALKOXIDES

Authors
DIRE S BABONNEAU F
Citation
S. Dire et F. Babonneau, SOL-GEL PRECURSORS - A SPECTROSCOPIC STUDY OF TRANSESTERIFICATION REACTIONS BETWEEN SILICON AND TITANIUM ALKOXIDES, Journal of non-crystalline solids, 167(1-2), 1994, pp. 29-36
Citations number
19
Categorie Soggetti
Material Science, Ceramics
Journal title
Journal of non-crystalline solids → ACNP
ISSN journal
00223093
Volume
167
Issue
1-2
Year of publication
1994
Pages
29 - 36
Database
ISI
SICI code
0022-3093(1994)167:1-2<29:SP-ASS>2.0.ZU;2-1
Abstract
This study shows that transesterification reactions occur spontaneousl y when silicon (Si(OR)4) and titanium alkoxides (Ti(OR')4) are mixed, leading to the formation of mixed species, Si(OR)4-x(OR')x and Ti(OR') 4-y(OR)y. The reaction between silicon ethoxide and titanium isopropox ide was characterized using multinuclear nuclear magnetic resonance (H -1, C-13, O-17, Si-29, Ti-47, Ti-49) and Ti K edge X-ray absorption (X ANES and EXAFS) spectroscopies. Possible structures of the reaction pr oducts are suggested.