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- W2507736161 endingPage "927" @default.
- W2507736161 startingPage "916" @default.
- W2507736161 abstract "In recent years, various protocols on preparing Lewis acidic Sn‐ β zeolite hydrothermally and postsynthetically have been reported. However, very little is known about the effects of different synthesis protocols on the Sn( IV ) speciation in the final material. Even the effects of individual synthesis parameters within a certain preparation method have not been studied systematically. Here, we demonstrate that hydrothermally synthesized Sn‐ β zeolites prepared via very similar recipes show significantly different 119 Sn‐ NMR spectra, suggesting different Sn site speciation. Among postsynthetically prepared Sn‐ β zeolites, less variation in the resulting 119 Sn‐ NMR spectra have been observed, indicating a more reproducible synthesis procedure compared to hydrothermal synthesis in fluoride media. This work highlights the importance of 119 Sn‐ NMR measurements to elucidate the precise local geometry of the Sn heteroatoms in Sn‐ β , and the need to quantify the number of reactive Sn sites on each sample that participate in a given catalytic reaction, in order to accurately compare materials prepared by different routes." @default.
- W2507736161 created "2016-09-16" @default.
- W2507736161 creator A5013274748 @default.
- W2507736161 creator A5016126135 @default.
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- W2507736161 creator A5070240952 @default.
- W2507736161 creator A5072511676 @default.
- W2507736161 creator A5074252826 @default.
- W2507736161 date "2016-11-09" @default.
- W2507736161 modified "2023-10-16" @default.
- W2507736161 title "Identifying Sn Site Heterogeneities Prevalent Among Sn-Beta Zeolites" @default.
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