Sensing and discrimination of explosives at variable concentration with a large-pore MOF as part of a luminescent array

Jurcic, M., Peveler, W. J. , Savory, C. N., Bučar, D.-K., Kenyon, A. J., Scanlon, D. O. and Parkin, I. P. (2019) Sensing and discrimination of explosives at variable concentration with a large-pore MOF as part of a luminescent array. ACS Applied Materials and Interfaces, 11(12), pp. 11618-11626. (doi: 10.1021/acsami.8b22385) (PMID:30830741)

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Abstract

Metal–organic frameworks (MOFs) have shown great promise for sensing of dangerous chemicals, including environmental toxins, nerve agents, and explosives. However, challenges remain, such as the sensing of larger analytes and the discrimination between similar analytes at different concentrations. Herein, we present the synthesis and development of a new, large-pore MOF for explosives sensing and demonstrate its excellent sensitivity against a range of relevant explosive compounds including trinitrotoluene and pentaerythritol tetranitrate. We have developed an improved, thorough methodology to eliminate common sources of error in our sensing protocol. We then combine this new MOF with two others as part of a three-MOF array for luminescent sensing and discrimination of five explosives. This sensor works at part-per-million concentrations and, importantly, can discriminate explosives with high accuracy without reference to their concentration.

Item Type:Articles
Additional Information:MJ acknowledges the EPSRC SECReT Doctoral Training Centre (EP/G037264/1). WJP was recipient of an EPSRC Doctoral Prize Fellowship (EP/M506448/1) and acknowledges the University of Glasgow for a Lord Kelvin Adam Smith Fellowship. DOS acknowledges funding through EPSRC (Grant No. EP/N01572X/1) and CNS is grateful to EPSRC and the Department of Chemistry at UCL for the provision of a Doctoral Training Partnership studentship (ref No. 1492829). The authors acknowledge the EPSRC for funding UCL’s X-ray diffractometers (EP/K03930X/1). The DFT calculations in this article made use of the ARCHER U.K. National Supercomputing Service (http://www.archer.ac.uk), via our membership of the U.K.'s HEC Materials Chemistry Consortium, which is funded by EPSRC (Grant No. EP/ L000202), and the UCL Legion (Legion@UCL) and Grace (Grace@UCL) HPC Facilities.
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Peveler, Dr William
Authors: Jurcic, M., Peveler, W. J., Savory, C. N., Bučar, D.-K., Kenyon, A. J., Scanlon, D. O., and Parkin, I. P.
College/School:College of Science and Engineering > School of Engineering > Biomedical Engineering
Journal Name:ACS Applied Materials and Interfaces
Publisher:American Chemical Society
ISSN:1944-8244
ISSN (Online):1944-8252
Published Online:04 March 2019
Copyright Holders:Copyright © 2019 American Chemical Society
First Published:First published in ACS Applied Materials and Interfaces 11:11618-11626
Publisher Policy:Reproduced in accordance with the copyright policy of the publisher

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