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The effect of structure directing agents on the ordering of fluoride ions in pure silica MFI zeolites

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Wormald_2015_PCCP_TheEffect_PublishedVersion_CCBY.pdf (1.472Mb)
Date
14/05/2015
Author
Brace , S. L.
Wormald, Philip
Darton, Richard John
Funder
EPSRC
Grant ID
EP/E041825/1
Keywords
QD Chemistry
NDAS
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Abstract
The effect of different sizes of structure directing agents on the ordering of the fluoride ions in pure silica MFI zeolites has been determined using magic angle spinning solid state NMR. By synthesizing fluoride containing pure silica MFI zeolites using methyltributylammonium cations as the structure directing agent, it has been possible to change the type of ordering seen for the fluoride ions at room temperature from the previously reported dynamic to static disorder. An initial mechanism for how this fluoride ordering occurs is suggested based upon the coulombic interaction between the positive charge on the nitrogen and the negative fluoride ion, within the zeolite framework, with different sizes of tetraalkylammonium cations.
Citation
Brace , S L , Wormald , P & Darton , R J 2015 , ' The effect of structure directing agents on the ordering of fluoride ions in pure silica MFI zeolites ' , Physical Chemistry Chemical Physics , vol. 17 , no. 18 , pp. 11950-11953 . https://doi.org/10.1039/c5cp00834d
Publication
Physical Chemistry Chemical Physics
Status
Peer reviewed
DOI
https://doi.org/10.1039/c5cp00834d
ISSN
1463-9076
Type
Journal article
Rights
Copyright 2016 the Authors. This article is licensed under a Creative Commons Attribution 3.0 Unported Licence (http://creativecommons.org/licenses/by/3.0/).
Description
The authors would like to thank Keele University and the University of St Andrews for providing a PhD studentship for SLB. PW would like to thank the EPSRC for funding (EP/E041825/1). RJD would like to thank Prof. Colin Fyfe of the University of British Columbia for useful discussions and for providing NMR spectrometer time for initial results.
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  • University of St Andrews Research
URL
http://www.rsc.org/suppdata/c5/cp/c5cp00834d/c5cp00834d1.pdf
URI
http://hdl.handle.net/10023/8578

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