Evaluation of Zeolite Acidity by <sup>31</sup>P MAS NMR Spectroscopy of Adsorbed Phosphine Oxides: Quantitative or Not?
D. S. Zasukhin, I. A. Kasyanov, Yu. G. Kolyagin, A. I. Bulygina, Karl Kharas, І. І. Іванова
Abstract
-octylphosphine oxide (TOPO)) is shown to be a good tool for distinguishing between the active sites inside the zeolite pores, mesopores, and on the outer crystal surface. The methodology proposed is verified on BEA zeolites different in composition, texture, and morphology.
Topics & Concepts
ZeoliteMagic angle spinningSilanolMesoporous materialChemistryPhosphineNuclear magnetic resonance spectroscopySpectroscopyAdsorptionOxidePhosphine oxideInorganic chemistryAnalytical Chemistry (journal)Physical chemistryCatalysisOrganic chemistryPhysicsQuantum mechanicsAdvanced NMR Techniques and ApplicationsZeolite Catalysis and SynthesisChemical Synthesis and Characterization