Hostname: page-component-7bb8b95d7b-dvmhs Total loading time: 0 Render date: 2024-09-22T15:14:44.203Z Has data issue: false hasContentIssue false
  • English
  • Français

29Si Nmr Study of Hydrolyzed Teos-Rteos (R: Methyl, Ethyl, Phenyl) Systems

Published online by Cambridge University Press:  10 February 2011

J. Mendez-Vivar ,
A. Mendoza-Bandala ,
A. Gutierrez  and
G. Cao
J. Mendez-Vivar
Affiliation:
Universidad Autónoma Metropolitana-Iztapalapa, Depto. de Química. A. P. 55–534 México, D. F. 09340 México, jmv@xanum.uam.mx
A. Mendoza-Bandala
Affiliation:
Universidad Autónoma Metropolitana-Iztapalapa, Depto. de Química. A. P. 55–534 México, D. F. 09340 México, jmv@xanum.uam.mx
A. Gutierrez
Affiliation:
Universidad Autónoma Metropolitana-Iztapalapa, Depto. de Química. A. P. 55–534 México, D. F. 09340 México, jmv@xanum.uam.mx
G. Cao
Affiliation:
University of Washington; Materials Science & Engineering Department, 302 Roberts Box 352120 Seattle, Washington 98195-2120 USA, gzcao@u.washington.edu
Get access

Abstract

Sols composed of Tetraethoxysilane (TEOS) and RTEOS (R: methyl, ethyl, phenyl) catalyzed with HCl were prepared. The molar ratios TEOS :RTEOS:EtOH:H20:HC1 were (1.0-0.8947):(5.26×10−2-0.1579):0.95:1.0:7×10−4, respectively. The sols were analyzed by 29 Si NMR immediately after mixing the reagents in order to study the hydrolysis and condensation reactions. A predominant self-condensation was observed in the TEOS-ETEOS sol, compared to cross-condensation. This result was opposite to the behaviour of the TEOS-MTEOS and TEOS-PTEOS sols.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 519: Symposium O – Organic/Inorganic Hybrid Materials , 1998 , 163
Copyright
Copyright © Materials Research Society 1998

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 Chmurny, G. N. and Hoult, D. L., Concepts in Magnetic Resonance, 2,131(1990).Google Scholar
2 Prabakar, S., Assink, R. A., Raman, N. K. and Brinker, C. J. in Better Ceramics Through Chemistry VI, ed. by Cheetham, A. K., Brinker, C. J., Mecartney, M. L. and Sanchez, C. (Mater. Res. Soc. Symp. Proc. 346, Pittsburgh, PA 1994), p. 976–984.Google Scholar
3 Hook, R. J., J. Non-Cryst. Solids 195,1(1996)Google Scholar
4 a) Sanchez, C. and In, M., J. Non-Cryst. Solids, 147&148,1(1992). b) C. W. Turner and K. J. Franklin, J. Non-Cryst. Solids, 91,(1987).Google Scholar
5 a) Babonneau, F., Gualandris, V. and Pauthe, M., in ref. [2], p. 119. b) C.-C. Lin and J. D. Basil in Better Ceramics Through Chemistry II, ed. by C. J. Brinker, D. E. Clark and D. R. Ulrich (Mater. Res. Soc. Symp. Proc. 73, Pittsburgh, PA 1986), p. 585–590.Google Scholar
6 Prabakar, S. and Assink, R. A., J. Non-Cryst. Solids, 211,39(1997).Google Scholar
7 Sugahara, Y., Okada, S., Sato, S., Kuroda, K. and Kato, C., J. Non-Cryst. Solids, 167,21(1994).10.1016/0022-3093(94)90362-XGoogle Scholar
8 Pouxviel, J. C. and Boilot, J. P., J. Non-Cryst. Solids, 89,345(1987).Google Scholar
9 Prabakar, S., Assink, R. A., Raman, N. K., Myers, S. A. and Brinker, C. J., J. Non-Cryst. Solids, 202,53(1996).Google Scholar
10 Pouxviel, J. C., Boilot, J. P., Beloeiel, J. C. and Lallemand, J. Y., J. Non-Cryst. Solids, 89,345(1987).10.1016/S0022-3093(87)80277-6Google Scholar