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Exploiting parameter space in MOFs: a 20-fold enhancement of phosphate-ester hydrolysis with UiO-66-NH(2)
The hydrolysis of nerve agents is of primary concern due to the severe toxicity of these agents. Using a MOF-based catalyst (UiO-66), we have previously demonstrated that the hydrolysis can occur with relatively fast half-lives of 50 minutes. However, these rates are still prohibitively slow to be e...
Autores principales: | , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Royal Society of Chemistry
2015
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5645779/ https://www.ncbi.nlm.nih.gov/pubmed/29308142 http://dx.doi.org/10.1039/c4sc03613a |
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author | Katz, Michael J. Moon, Su-Young Mondloch, Joseph E. Beyzavi, M. Hassan Stephenson, Casey J. Hupp, Joseph T. Farha, Omar K. |
author_facet | Katz, Michael J. Moon, Su-Young Mondloch, Joseph E. Beyzavi, M. Hassan Stephenson, Casey J. Hupp, Joseph T. Farha, Omar K. |
author_sort | Katz, Michael J. |
collection | PubMed |
description | The hydrolysis of nerve agents is of primary concern due to the severe toxicity of these agents. Using a MOF-based catalyst (UiO-66), we have previously demonstrated that the hydrolysis can occur with relatively fast half-lives of 50 minutes. However, these rates are still prohibitively slow to be efficiently utilized for some practical applications (e.g., decontamination wipes used to clean exposed clothing/skin/vehicles). We thus turned our attention to derivatives of UiO-66 in order to probe the importance of functional groups on the hydrolysis rate. Three UiO-66 derivatives were explored; UiO-66-NO(2) and UiO-66-(OH)(2) showed little to no change in hydrolysis rate. However, UiO-66-NH(2) showed a 20 fold increase in hydrolysis rate over the parent UiO-66 MOF. Half-lives of 1 minute were observed with this MOF. In order to probe the role of the amino moiety, we turned our attention to UiO-67, UiO-67-NMe(2) and UiO-67-NH(2). In these MOFs, the amino moiety is in close proximity to the zirconium node. We observed that UiO-67-NH(2) is a faster catalyst than UiO-67 and UiO-67-NMe(2). We conclude that the role of the amino moiety is to act as a proton-transfer agent during the catalytic cycle and not to hydrogen bond or to form a phosphorane intermediate. |
format | Online Article Text |
id | pubmed-5645779 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2015 |
publisher | Royal Society of Chemistry |
record_format | MEDLINE/PubMed |
spelling | pubmed-56457792018-01-05 Exploiting parameter space in MOFs: a 20-fold enhancement of phosphate-ester hydrolysis with UiO-66-NH(2) Katz, Michael J. Moon, Su-Young Mondloch, Joseph E. Beyzavi, M. Hassan Stephenson, Casey J. Hupp, Joseph T. Farha, Omar K. Chem Sci Chemistry The hydrolysis of nerve agents is of primary concern due to the severe toxicity of these agents. Using a MOF-based catalyst (UiO-66), we have previously demonstrated that the hydrolysis can occur with relatively fast half-lives of 50 minutes. However, these rates are still prohibitively slow to be efficiently utilized for some practical applications (e.g., decontamination wipes used to clean exposed clothing/skin/vehicles). We thus turned our attention to derivatives of UiO-66 in order to probe the importance of functional groups on the hydrolysis rate. Three UiO-66 derivatives were explored; UiO-66-NO(2) and UiO-66-(OH)(2) showed little to no change in hydrolysis rate. However, UiO-66-NH(2) showed a 20 fold increase in hydrolysis rate over the parent UiO-66 MOF. Half-lives of 1 minute were observed with this MOF. In order to probe the role of the amino moiety, we turned our attention to UiO-67, UiO-67-NMe(2) and UiO-67-NH(2). In these MOFs, the amino moiety is in close proximity to the zirconium node. We observed that UiO-67-NH(2) is a faster catalyst than UiO-67 and UiO-67-NMe(2). We conclude that the role of the amino moiety is to act as a proton-transfer agent during the catalytic cycle and not to hydrogen bond or to form a phosphorane intermediate. Royal Society of Chemistry 2015-04-01 2015-02-24 /pmc/articles/PMC5645779/ /pubmed/29308142 http://dx.doi.org/10.1039/c4sc03613a Text en This journal is © The Royal Society of Chemistry 2015 http://creativecommons.org/licenses/by/3.0/ This is an Open Access article distributed under the terms of the Creative Commons Attribution 3.0 Unported License (http://creativecommons.org/licenses/by/3.0/) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. |
spellingShingle | Chemistry Katz, Michael J. Moon, Su-Young Mondloch, Joseph E. Beyzavi, M. Hassan Stephenson, Casey J. Hupp, Joseph T. Farha, Omar K. Exploiting parameter space in MOFs: a 20-fold enhancement of phosphate-ester hydrolysis with UiO-66-NH(2) |
title | Exploiting parameter space in MOFs: a 20-fold enhancement of phosphate-ester hydrolysis with UiO-66-NH(2)
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title_full | Exploiting parameter space in MOFs: a 20-fold enhancement of phosphate-ester hydrolysis with UiO-66-NH(2)
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title_fullStr | Exploiting parameter space in MOFs: a 20-fold enhancement of phosphate-ester hydrolysis with UiO-66-NH(2)
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title_full_unstemmed | Exploiting parameter space in MOFs: a 20-fold enhancement of phosphate-ester hydrolysis with UiO-66-NH(2)
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title_short | Exploiting parameter space in MOFs: a 20-fold enhancement of phosphate-ester hydrolysis with UiO-66-NH(2)
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title_sort | exploiting parameter space in mofs: a 20-fold enhancement of phosphate-ester hydrolysis with uio-66-nh(2) |
topic | Chemistry |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5645779/ https://www.ncbi.nlm.nih.gov/pubmed/29308142 http://dx.doi.org/10.1039/c4sc03613a |
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