Hostname: page-component-77c89778f8-7drxs Total loading time: 0 Render date: 2024-07-20T23:28:20.026Z Has data issue: false hasContentIssue false
  • English
  • Français

Synthesis of Ordered Silicates by the Use of Organic Structure-Directing Agents

Published online by Cambridge University Press:  10 February 2011

Yoshihiro Kubota  and
Mark E. Davis
Yoshihiro Kubota
Affiliation:
Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, CA 91125
Mark E. Davis
Affiliation:
Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, CA 91125
Get access

Abstract

Microporous, crystalline silicates can be synthesized using organic structure-directing molecules whose function is to organize silicate species into particular arrangements that then spontaneously self-assemble into the final crystalline materials. The porosity is obtained by removal of the organic component. We discuss the molecular properties (size, rigidity, hydrophobicity) necessary for the organic component to interact with aqueous silicate species and prepare microporous silicates. It is shown that a strategy to construct large organic molecules in order to prepare large pore crystalline silicates could involve the use of two charge centers if these functionalities are distributed within the molecules such to prevent aggregation in aqueous media. A charge distribution that allows aggregation of the organic molecules at synthesis conditions directs the formation of a locally amorphous, mesoporous silicate rather than a crystalline, microporous material.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 435: Symposium V – Better Ceramics Through Chemistry VII , 1996 , 263
Copyright
Copyright © Materials Research Society 1996

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

1. Davis, M.E. and Lobo, R.F., Chem. Mater. 4, 756 (1992).Google Scholar
2. Kresge, C.T., Leonowicz, M.E., Roth, W.J., Vartuli, J.C. and Beck, J.S., Nature 359, 710 (1992).Google Scholar
3. Chen, C.Y., Li, H.X. and Davis, M.E., Microporous Mater. 2, 17 (1993).Google Scholar
4. Davis, M.E., Stud. Sur.Sci. Catal., 79, 35 (1995), and references therein.Google Scholar
5. Chen, C.Y., Burkett, S.L., Li, H.X. and Davis, M.E., Microporous Mater. 2, 27 (1993).Google Scholar
6. Kubota, Y., Helmkamp, M.M., Zones, S.I. and Davis, M.E., Microporous Mater., in press.Google Scholar
7. Lobo, R.F., Zones, S.I. and Davis, M.E., J. Incl. Phenom. 21, 47 (1995).Google Scholar
8. Zones, S. I. and Davis, M. E., in Synthesis of Microporous Materials: Zeolites, Clays. Nanocomposites, edited by Occelli, M., Kessler, H. (Marcel Dekker, New York), in press.Google Scholar
9. Brand, H.V., Curtiss, L.A., Iton, L.E., Trouw, F.R. and Brun, T.O., J. Phys. Chem. 98, 1293 (1994).Google Scholar
10. Burkett, S.L. and Davis, M. E., Chem. Mater. 7, 920 (1995).Google Scholar
11. Burkett, S.L. and Davis, M. E., Chem. Mater. 7, 1453 (1995).Google Scholar
12. Sommer, H.Z., Lipp, H.I. and Jackson, L.L., J. Org. Chem. 36, 824 (1971).Google Scholar
13. Lobo, R.F. and Davis, M.E., J. Am. Chem. Soc. 117, 3766 (1995).Google Scholar
14. Goepper, M., Li, H.X. and Davis, M.E., J. Chem. Soc., Chem. Commun., 1665 (1992).Google Scholar