Arylsilsesquioxane Gels and Related Materials. New Hybrids of Organic and Inorganic Networks

K. J. Shea, D. A. Loy, O. Webster

Research output: Contribution to journalArticle

496 Scopus citations

Abstract

Molecular building blocks for the preparation of amorphous hybrid organic-inorganic network materials have been synthesized. Hydrolysis and condensation of bis(triethoxysilyl)aryl 1-4 and -ethynyl 5 monomers results in formation of aryland ethynyl-bridged polysilsequioxanes in the form of xerogels. The gels were glasslike materials composed of uniform aggregates of particles between 50 and 80 nm in diameter. Atomic force microscopy was used to examine the fine grained aggregate characteristics of phenyl-bridged polysilsesquioxanes. The aryl-bridged materials were microporous with surface areas as high as 1000 m2/g and thermally stable to 400 °C in air. Solid state 13C and 29Si NMR spectroscopies were used evaluate the integrity of the aryl and ethynyl bridges and to determine the degrees of hydrolysis (semiquantitative) and condensation in the network materials.

Original languageEnglish (US)
Pages (from-to)6700-6710
Number of pages11
JournalJournal of the American Chemical Society
Volume114
Issue number17
DOIs
StatePublished - Aug 1 1992
Externally publishedYes

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)
  • Biochemistry
  • Colloid and Surface Chemistry

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