Aromatic PMOs

Tolyl, xylyl and dimethoxyphenyl groups integrated within the channel walls of hexagonal mesoporous silicas

G. Temtsin, Teddy Asefa, S. Bittner, G. A. Ozin

Research output: Contribution to journalArticle

95 Citations (Scopus)

Abstract

There exists a need to synthesize PMOs with bridging organic groups beyond the few that are accessible from commercially available bis(triethoxysilyl)organic precursors. To fulfill this need, three new periodic mesoporous arylsilicas, aromatic PMOs, having bridging aromatic organic groups as an integral part of the framework have been synthesized and structurally characterized. The surfactant-templated synthesis employed new precursors consisting of two triethoxysilyl groups connected via toluene, p-xylene or 1,4-dimethoxybenzene. Diffraction and microscopy together with 13C CP-MAS NMR, 29Si MAS NMR and FT-Raman/IR measurements proved that the aryl-silica bonds in the new precursors and aromatic PMOs are stable under hydrolytic polycondensation self-assembly and surfactant acid extraction conditions. These PMOs have an ordered hexagonal channel mesostructure, some degree of ordering of aromatic groups likely through π-π stacking in the channel walls, a large pore volume and surface area, and relatively thick arylsilica walls whose dimensions seem to scale with the spatial demands of the aryl group.

Original languageEnglish
Pages (from-to)3202-3206
Number of pages5
JournalJournal of Materials Chemistry
Volume11
Issue number12
DOIs
Publication statusPublished - 2001

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Surface-Active Agents
Silicon Dioxide
Surface active agents
Silica
Nuclear magnetic resonance
silicon dioxide
Toluene
Xylene
Polycondensation
Self assembly
Microscopic examination
Diffraction
Acids
surfactants
thick walls
nuclear magnetic resonance
xylene
toluene
self assembly
microscopy

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Materials Chemistry
  • Materials Science(all)

Cite this

Aromatic PMOs : Tolyl, xylyl and dimethoxyphenyl groups integrated within the channel walls of hexagonal mesoporous silicas. / Temtsin, G.; Asefa, Teddy; Bittner, S.; Ozin, G. A.

In: Journal of Materials Chemistry, Vol. 11, No. 12, 2001, p. 3202-3206.

Research output: Contribution to journalArticle

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