Periodic mesoporous organosilicas with domain functionality: Synthesis and advanced characterization

James T. A. Jones, Colin D. Wood, Calum Dickinson, Yaroslav Z. Khimyak

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Bifunctional periodic mesoporous organosilicas (PMOs) with CH2CH2/CHCH bridges have been synthesized using a salt assisted nonionic templating method. The ability to direct locations of the individual organic groups using a novel silica precursor prehydrolysis step is demonstrated. Depending on the prehydrolysis conditions the products showed either structural heterogeneities consisting of domains of the same functionality or a structurally homogeneous system, confirmed by 1H-29Si heteronuclear correlation (HETCOR) experiments. The resulting PMOs show large pore volumes (up to 1.34 cm3 g-1) and high surface areas (up to 1310 m2 g-1). The ability to form domain structures within the same mesostructure may have potential applications in molecular recognition and separation.
Original languageEnglish
Pages (from-to)3385-3397
Number of pages13
JournalChemistry of Materials
Issue number10
Publication statusPublished - 27 May 2008

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