Nuclear magnetic resonance studies of the synthesis of silicalite by the ‘fluoride method’
- 1 January 1993
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Journal of the Chemical Society, Faraday Transactions
- Vol. 89 (23) , 4245-4248
- https://doi.org/10.1039/ft9938904245
Abstract
The composition of the mother liquor in the course of synthesis of silicalite by the fluoride method has been monitored by 13C, 19F and 29Si NMR and by atomic absorption spectrometry. The Si content never exceeds 5% of the total Si content. Several distinct fluorosilicate species apart from SiF2– 6 coexist in a complex dynamic equilibrium in the solution. The results indicate that synthesis proceeds via the type B solid–solid transformation mechanism, and we describe the successive reaction steps.Keywords
This publication has 14 references indexed in Scilit:
- Quantitative monitoring of the crystallization of zeolite ZSM-5/ silicalite in non-alkaline mediaApplied Catalysis, 1989
- Characterization of crystalline and amorphous phases during the synthesis of (TPA, M)-ZSM-5 zeolites (M = Li, Na, K)Journal of the Chemical Society, Faraday Transactions 1: Physical Chemistry in Condensed Phases, 1989
- Recent Advances in Zeolite SynthesisPublished by Elsevier ,1989
- Multinuclear NMRPublished by Springer Nature ,1987
- Chemical shifts of fluorine in hydrogen fluoride and fluoride ionJournal of Fluorine Chemistry, 1985
- Complex fluoroanions in solution. XI. Complexes of silicon, germanium, and titanium tetrafluorides with simple anionsCanadian Journal of Chemistry, 1980
- Fluorine exchange between four-, five-, and six-coordinate silicon compoundsCanadian Journal of Chemistry, 1977
- Nuclear magnetic resonance study of catalyzed intermolecular fluorine exchange in the methyltetrafluorosilicate anionCanadian Journal of Chemistry, 1977
- 19F NUCLEAR MAGNETIC RESONANCE STUDIESPublished by Elsevier ,1966
- Structure and Exchange Processes in Some Inorganic Fluorides by Nuclear Magnetic Resonance1Journal of the American Chemical Society, 1959