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Simple Systematic Synthesis of Periodic Mesoporous Organosilica Nanoparticles with Adjustable Aspect Ratios

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Author(s): Mohanty Paritosh | Landskron Kai

Journal: Nanoscale Research Letters
ISSN 1931-7573

Volume: 4;
Issue: 12;
Start page: 1524;
Date: 2009;
Original page

Keywords: Periodic mesoporous organosilicas | One-dimensional nanostructures | Synthesis

ABSTRACT
Abstract One-dimensional periodic mesoporous organosilica (PMO) nanoparticles with tunable aspect ratios are obtained from a chain-type molecular precursor octaethoxy-1,3,5-trisilapentane. The aspect ratio can be tuned from 2:1 to >20:1 simply by variation in the precursor concentration in acidic aqueous solutions containing constant amounts of triblock copolymer Pluronic P123. The mesochannels are highly ordered and are oriented parallel to the longitudinal axis of the PMO particles. No significant Si–C bond cleavage occurs during the synthesis according to29Si MAS NMR. The materials exhibit surface areas between 181 and 936 m2 g−1.

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Tangokurs Rapperswil-Jona

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