Reactions of Dimethylether in Single Crystals of the Silicoaluminophosphate STA-7 Studied via Operando Synchrotron Infrared Microspectroscopy

ABSTRACT: Synchrotron infrared micro-spectroscopy has been applied to measure in situ the reaction of dimethylether in single crystals of the silicoaluminophosphate STA-7. The crystals are found to contain a uniform and homogeneous distribution of acidic hydroxyl groups. Dimethylether is hydrogen bo...

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Detalles Bibliográficos
Autores principales: Howe, Russell F., Suwardiyanto, Price, David J., Castro, Maria, Wright, Paul A., Greenaway, Alex, Frogley, Mark D., Cinque, Gianfelice
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Springer US 2018
Materias:
Original Paper
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6413811/
https://www.ncbi.nlm.nih.gov/pubmed/30956505
http://dx.doi.org/10.1007/s11244-018-0890-9
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author Howe, Russell F.
Suwardiyanto
Price, David J.
Castro, Maria
Wright, Paul A.
Greenaway, Alex
Frogley, Mark D.
Cinque, Gianfelice
author_facet Howe, Russell F.
Suwardiyanto
Price, David J.
Castro, Maria
Wright, Paul A.
Greenaway, Alex
Frogley, Mark D.
Cinque, Gianfelice
author_sort Howe, Russell F.
collection PubMed
description ABSTRACT: Synchrotron infrared micro-spectroscopy has been applied to measure in situ the reaction of dimethylether in single crystals of the silicoaluminophosphate STA-7. The crystals are found to contain a uniform and homogeneous distribution of acidic hydroxyl groups. Dimethylether is hydrogen bonded to the hydroxyl groups at low temperatures, but evidence is found for dissociation to form surface methoxy groups above 473 K, and aromatic hydrocarbon pool species above 573 K. From time resolved infrared measurements coupled with MS analysis of evolved products it is concluded that alkene formation occurs via a direct mechanism from reaction of dimethylether with surface methoxy groups. GRAPHICAL ABSTRACT: [Image: see text]
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spelling pubmed-64138112019-04-03 Reactions of Dimethylether in Single Crystals of the Silicoaluminophosphate STA-7 Studied via Operando Synchrotron Infrared Microspectroscopy Howe, Russell F. Suwardiyanto Price, David J. Castro, Maria Wright, Paul A. Greenaway, Alex Frogley, Mark D. Cinque, Gianfelice Top Catal Original Paper ABSTRACT: Synchrotron infrared micro-spectroscopy has been applied to measure in situ the reaction of dimethylether in single crystals of the silicoaluminophosphate STA-7. The crystals are found to contain a uniform and homogeneous distribution of acidic hydroxyl groups. Dimethylether is hydrogen bonded to the hydroxyl groups at low temperatures, but evidence is found for dissociation to form surface methoxy groups above 473 K, and aromatic hydrocarbon pool species above 573 K. From time resolved infrared measurements coupled with MS analysis of evolved products it is concluded that alkene formation occurs via a direct mechanism from reaction of dimethylether with surface methoxy groups. GRAPHICAL ABSTRACT: [Image: see text] Springer US 2018-01-16 2018 /pmc/articles/PMC6413811/ /pubmed/30956505 http://dx.doi.org/10.1007/s11244-018-0890-9 Text en © The Author(s) 2018 Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.
spellingShingle Original Paper
Howe, Russell F.
Suwardiyanto
Price, David J.
Castro, Maria
Wright, Paul A.
Greenaway, Alex
Frogley, Mark D.
Cinque, Gianfelice
Reactions of Dimethylether in Single Crystals of the Silicoaluminophosphate STA-7 Studied via Operando Synchrotron Infrared Microspectroscopy
title Reactions of Dimethylether in Single Crystals of the Silicoaluminophosphate STA-7 Studied via Operando Synchrotron Infrared Microspectroscopy
title_full Reactions of Dimethylether in Single Crystals of the Silicoaluminophosphate STA-7 Studied via Operando Synchrotron Infrared Microspectroscopy
title_fullStr Reactions of Dimethylether in Single Crystals of the Silicoaluminophosphate STA-7 Studied via Operando Synchrotron Infrared Microspectroscopy
title_full_unstemmed Reactions of Dimethylether in Single Crystals of the Silicoaluminophosphate STA-7 Studied via Operando Synchrotron Infrared Microspectroscopy
title_short Reactions of Dimethylether in Single Crystals of the Silicoaluminophosphate STA-7 Studied via Operando Synchrotron Infrared Microspectroscopy
title_sort reactions of dimethylether in single crystals of the silicoaluminophosphate sta-7 studied via operando synchrotron infrared microspectroscopy
topic Original Paper
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6413811/
https://www.ncbi.nlm.nih.gov/pubmed/30956505
http://dx.doi.org/10.1007/s11244-018-0890-9
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