Aluminum-27 magic angle spinning nuclear magnetic resonance studies of zeolite TPA-ZSM-5 as a function of crystallization time.
Several distinct Al tetrahedral sites in the shape-selective zeolite catalyst TPA-ZSM-5 were obsd. by 27Al NMR at 130 MHz. The distinct Al sites in TPA-ZSM-5 are induced by the presence of Pr4N+.
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