Aluminum-27 magic angle spinning nuclear magnetic resonance studies of zeolite TPA-ZSM-5
In: The Journal of Physical Chemistry, Jg. 89 (1985), Heft 10, S. 1850 - 1852
Titel in Englisch:
Aluminum-27 magic angle spinning nuclear magnetic resonance studies of zeolite TPA-ZSM-5
Autor*in:
Erscheinungsjahr:
1985
Sprache des Textes:
Englisch
Erschienen in
Erscheinungsort:
Washington
Verlag:
American Chemical Society (ACS)
in:
Jg. 89 (1985), Heft 10, S. 1850 - 1852
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Abstract:
The observation by 27Al magic angle spinning NMR of distinct Al tetrahedral sites in TPA-ZSM-5 (TPA = Pr4N+) in contrast to Na, H-ZSM-5 is related to the TPA/Al ratio in zeolite TPA-ZSM-5. For TPA-ZSM-5 with a TPA/Al ratio >1, only 1 27Al resonance is obsd. at 53.5 ppm. In the case of a TPA/Al ratio <1, an addnl. 27Al resonance is obsd. at 60.0 ppm, due to the hydrated Na ions needed for the neutralization of AlO4- tetrahedrons not charge compensated by TPA+.