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Silicon-29 Nuclear Magnetic Resonance Spectroscopy of Silicon Ethoxide and Titanium Ethoxide Sols: Resonance Assignments and Solution Stability

Published online by Cambridge University Press:  25 February 2011

E. N. Boulos ,
K. R. Carduner ,
R. O. Carter III  and
M. F. Best
E. N. Boulos
Affiliation:
Product Research and Development Office, Glass Division, Ford Motor Company, Dearborn, Michigan, 41820
K. R. Carduner
Affiliation:
Research Staff, Scientific Research Laboratories, Ford Motor Company, Dearborn, Michigan, 48121
R. O. Carter III
Affiliation:
Research Staff, Scientific Research Laboratories, Ford Motor Company, Dearborn, Michigan, 48121
M. F. Best
Affiliation:
Product Research and Development Office, Glass Division, Ford Motor Company, Dearborn, Michigan, 41820
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Abstract

Silicon-29 NMR spectroscopy has been widely applied to characterize the development of molecular complexity of silicon alkoxide sols. In the present study, the progression of molecular complexity of partially hydro-lyzed/condensed tetraethoxysilane (TEOS) sols with increasing H2O/TEOS ratio is demonstrated by the study of a carefully prepared set of solutions. Intriguing trends in the 29si NMR spectra of increasingly hydro-lyzed sols are discussed. In an set of samples, TEOS is replaced in part by tetraethoxytitane, Ti(OEt)4 (TEOT). The effects on the 29Si NMR spectrum due to the presence of TEOT are presented and interpreted in terms of changes in the distribution of siloxane monomers and oligomers in solution. Preliminary data on the stability of these solutions with time are reported.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 121: Symposium H – Better Ceramics Through Chemistry III , 1988 , 531
Copyright
Copyright © Materials Research Society 1988

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References

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