Open-Framework and Microporous Vanadium Silicates

A series of novel vanadium silicates with open-framework and microporous structures has been synthesized under mild hydrothermal conditions. Ten distinct framework types have been identified that all have structures based on cross-linking single silicate sheets with square pyramidal VIVO5 units to g...

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Bibliographic Details
Published in:Journal of the American Chemical Society 2002-07, Vol.124 (26), p.7812-7820
Main Authors: Wang, Xiqu, Liu, Lumei, Jacobson, Allan J
Format: Article
Language:English
Subjects:
Chemistry
Colloidal state and disperse state
Condensed matter: structure, mechanical and thermal properties
Exact sciences and technology
General and physical chemistry
Inorganic compounds
Physics
Porous materials
Salts
Structure of solids and liquids
crystallography
Structure of specific crystalline solids
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Summary:A series of novel vanadium silicates with open-framework and microporous structures has been synthesized under mild hydrothermal conditions. Ten distinct framework types have been identified that all have structures based on cross-linking single silicate sheets with square pyramidal VIVO5 units to give compounds with the general formula A r [(VO) s (Si2O5) p (SiO2) q ]·tH2O, where A is Na, K, Rb, Cs, or a combination. The vanadosilicate (VSH-n) structures have free channel diameters up to 6.5 Å and show good thermal stability, absorption, and ion-exchange properties, suggesting their potential for technological applications as molecular sieves or in catalysis.
ISSN:0002-7863
1520-5126
DOI:10.1021/ja020354l