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Schlagwörter:
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Zusammenfassung:
FTIR Microscopy with polarized light was used to study the orientation of different molecules in Silicalite I, SAPO-5 and AlPO4-5 molecular sieves during the adsorption process and in their equilibrium positions. While the uptake and the equilibrium positions of p-xylene are essentially not influenced by the the framework charge, large differences between AlPO4-5 and SAPO-5 are observed with the strongly basic p-nitroaniline molecule.