Issue 33, 2012
From the journal:

Dalton Transactions

Structural and dynamical aspects of alkylammonium salts of a silicodecatungstate as heterogeneous epoxidation catalysts†

Sayaka Uchida,‡a   Keigo Kamata,a   Yoshiyuki Ogasawara,a   Megumi Fujitaa  and  Noritaka Mizuno*a  

* Corresponding authors

a Department of Applied Chemistry, School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
E-mail: tmizuno@mail.ecc.u-tokyo.ac.jp
Fax: +81-3-5841-7220

Abstract

The structural and dynamical aspects of alkylammonium salts of a silicodecatungstate [(CH3)4N]4[γ-SiW10O34(H2O)2] [C1], [(n-C3H7)4N]4[γ-SiW10O34(H2O)2] [C3], [(n-C4H9)4N]4[γ-SiW10O34(H2O)2] [C4], and [(n-C5H11)4N]4[γ-SiW10O34(H2O)2] [C5] were investigated. The results of sorption isotherms, XRD analyses, and solid-state NMR spectroscopy show that facile sorption of solvent molecules, flexibility of structures, and high mobility of alkylammonium cations are crucial to the uniform distribution of reactant and oxidant molecules throughout the bulk solid, which are related to the high catalytic activities for epoxidation of alkenes.

Graphical abstract: Structural and dynamical aspects of alkylammonium salts of a silicodecatungstate as heterogeneous epoxidation catalysts

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Article information

DOI
https://doi.org/10.1039/C2DT30492A
Article type
Paper
Submitted
01 Mar 2012
Accepted
26 Mar 2012
First published
30 Apr 2012

Dalton Trans., 2012,41, 9979-9983

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Structural and dynamical aspects of alkylammonium salts of a silicodecatungstate as heterogeneous epoxidation catalysts

S. Uchida, K. Kamata, Y. Ogasawara, M. Fujita and N. Mizuno, Dalton Trans., 2012, 41, 9979 DOI: 10.1039/C2DT30492A

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