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Pulsed field gradient NMR studies of small molecule diffusion in amorphous microporous silicas
Author(s) -
Krause Cordula,
Klein Stephan,
Kärger Jörg,
Maier Wilhelm F.
Publication year - 1996
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.19960081109
Subject(s) - microporous material , pulsed field gradient , physisorption , materials science , thermal diffusivity , molecule , amorphous solid , diffusion , characterization (materials science) , porosity , small molecule , porous medium , chemical physics , chemical engineering , nanotechnology , adsorption , chemistry , organic chemistry , thermodynamics , composite material , biochemistry , physics , engineering
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.