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Science 26 November 2004:
Vol. 306. no. 5701, pp. 1529 - 1532
DOI: 10.1126/science.1104555
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Reports

Periodic Mesoporous Dendrisilicas

Kai Landskron and Geoffrey A. Ozin*

We report the synthesis of a new class of materials called periodic mesoporous dendrisilicas. They are prepared from dendrimers with trialkoxysilyl groups at the outmost shell. Dendrimers of various cores and numbers of shells are used. The dendrisilica synthesis is based on acid- or base-catalyzed hydrolysis of the trialkoxysilyl groups and subsequent template-directed condensation of the dendrimers into an ordered template-dendrisilica nanocomposite. The template can be removed with organic solvents, producing a periodic mesoporous dendrisilica whose pore walls consist of interconnected dendrimer building blocks.

Materials Chemistry Research Group, Department of Chemistry, 80 St. George Street, University of Toronto, Toronto, Ontario M5S 3H6, Canada.

* To whom correspondence should be addressed. E-mail: gozin{at}chem.utoronto.ca

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Science. ISSN 0036-8075 (print), 1095-9203 (online)