Trimethylsilylation of Framework Brønsted Acid Sites in Microporous Zeolites and Silico-Aluminophosphates

Framework-bound alkoxy groups are well-studied intermediates in zeolite chemistry, but their low stability complicates their spectroscopic study in high-temperature reactions such as alkylation or dealkylation. Taking advantage of the much higher bond strength of Si−O versus C−O, we synthesized trim...

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Veröffentlicht in:	Journal of the American Chemical Society 2003-11, Vol.125 (46), p.13964-13965
Hauptverfasser:	Song, Weiguo, Marcus, David M, Abubakar, Saifudin M, Jani, Emma, Haw, James F
Format:	Artikel
Sprache:	eng
Schlagworte:	Chemistry Exact sciences and technology General and physical chemistry Ion-exchange Surface physical chemistry Zeolites: preparations and properties
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container_title	Journal of the American Chemical Society
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creator	Song, Weiguo Marcus, David M Abubakar, Saifudin M Jani, Emma Haw, James F
description	Framework-bound alkoxy groups are well-studied intermediates in zeolite chemistry, but their low stability complicates their spectroscopic study in high-temperature reactions such as alkylation or dealkylation. Taking advantage of the much higher bond strength of Si−O versus C−O, we synthesized trimethylsilylated zeolites by reacting them with phenyltrimethylsilane in a catalytic flow reactor at 648 K. In favorable cases, the reaction accurately titrated the acid sites, and 29Si and 13C MAS NMR spectra of the derivatized catalysts measured at room temperature confirmed the proposed reaction.
doi_str_mv	10.1021/ja034541a
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subjects	Chemistry Exact sciences and technology General and physical chemistry Ion-exchange Surface physical chemistry Zeolites: preparations and properties
title	Trimethylsilylation of Framework Brønsted Acid Sites in Microporous Zeolites and Silico-Aluminophosphates
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