Hierarchically Ordered Monolithic Silica with Bimodal Porosity Obtained by Hydrolysis and Condensation of 1,4-Bis(trimethoxysilyl)arenes

Authors

  • Martin von der Lehr,

    1. Justus-Liebig-Universität Gießen, Institute of Physical Chemistry, Heinrich-Buff-Ring 58, 35392 Gießen, Germany
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  • Christoph Weidmann,

    1. Justus-Liebig-Universität Gießen, Institute of Physical Chemistry, Heinrich-Buff-Ring 58, 35392 Gießen, Germany
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  • Dr. Simone Mascotto,

    1. University of Trento, Department of Materials Engineering and Industrial Technology, Via Mesiano 77, 38123 Trento, Italy
    2. Helmholtz-Zentrum-Berlin für Materialien und Energie GmbH, Albert-Einstein-Straße 15, 12489 Berlin, Germany
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  • Prof. Bernd M. Smarsly

    Corresponding author
    1. Justus-Liebig-Universität Gießen, Institute of Physical Chemistry, Heinrich-Buff-Ring 58, 35392 Gießen, Germany
    • Justus-Liebig-Universität Gießen, Institute of Physical Chemistry, Heinrich-Buff-Ring 58, 35392 Gießen, Germany

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Abstract

1,4-Bis(trimethoxysilyl)benzene and 1,4-bis((trimethoxysilyl)-phenyl)-dimethoxysilane were synthesized from their corresponding diarylbromides. These bis(trimethoxysilyl)arenes were used as organosilica precursors for the preparation of macro-/mesoporous silica monoliths, using poly(ethylen glycol) as a porogen to obtain a well-defined bicontinuous macroporosity and mesoporosity. The porosity of the prepared materials was characterized by nitrogen sorption measurements, mercury intrusion and scanning electron microscopy. The incorporation of silylarenes was studied by solid-state 13C NMR spectroscopy, IR spectroscopy and elemental analysis.

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