Metal mediated sol-gel chemistry of 1,2-Bis(triethoxysilyl)-ethene
Conference
·
OSTI ID:370606
- Sandia National Laboratories, Albuquerque, NM (United States)
Ethenyl-bridged polysilsesquioxane xerogels and aerogels were formed from the sol-gel polymerization of 1,2-bis(triethoxysilyl)ethene. Gels were synthesized from the cis- and trans-isomers by both acid and base catalysis. While the trans-monomer exhibited relatively fast gelation times, the cis-monomer depending on the conditions either formed no gel of had very long gelation times. The addition of a coordinating metal such as Pd to the cis-monomer sol results in dramatically decreased gelation times. The addition of salts with noncoordinating metals did not significantly shorten the gelation times indicating that a template effect may be directing the polymerization of the cis-monomer. The ethenyl-bridged polysilsesquioxanes were characterized by solid state {sup 29}Si and {sup 13}C NMR, nitrogen sorption porosimetry, and transmission electron microscopy.
- Research Organization:
- Sandia National Laboratory
- DOE Contract Number:
- AC04-94AL85000
- OSTI ID:
- 370606
- Report Number(s):
- CONF-960376--
- Country of Publication:
- United States
- Language:
- English
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