Advanced Materials

Pulsed field gradient NMR studies of small molecule diffusion in amorphous microporous silicas

Authors

  • Cordula Krause,

    1. Fakultät für Physik und Geowissenschaften Universität Leipzig Linnéstrasse 5, D=04103 Leipzig (Germany)
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  • Stephan Klein,

    1. Max-Planck-Institut für Kohlenforschung Kaiser-Wilhelm-Platz 1 D-45466 Mülheim an der Ruhr (Germany)
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  • Prof. Jörg Kärger,

    Corresponding author
    1. Fakultät für Physik und Geowissenschaften Universität Leipzig Linnéstrasse 5, D=04103 Leipzig (Germany)
    • Fakultät für Physik und Geowissenschaften Universität Leipzig Linnéstrasse 5, D-04103 Leipzig (Germany)
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  • Prof. Wilhelm F. Maier

    1. Max-Planck-Institut für Kohlenforschung Kaiser-Wilhelm-Platz 1 D-45466 Mülheim an der Ruhr (Germany)
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  • C. K. and J. K. are grateful for support from the Deutsche Forschungsgemeinschaft (SFB 294). S. K. and W. F. M. thank the Fonds der Chemischen Industrie for a fellowship and support.

Abstract

The channel system is a new class of porous materials can be studied by a combination of catalytic results, simple physicochemical characterization, and physical investigations. The investigations described here include the physisorption of small probe molecules, pulsed field gradient (PFG) NMR of selected small molecules, and the effect of surface polarity on diffusivity. These techniques will be useful in the search for novel microporous materials—for which there is a growing need—as an alternative to zeolites.

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