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

DOI: 10.1021/acsami.8b22385 DOI Help

Authors: Monika Jurcic (University College London) , William J. Peveler (University College London) , Christopher N. Savory (University College London) , Dejan-krešimir Bučar (University College London) , Anthony J. Kenyon (University College London) , David O. Scanlon (University College London; Diamond Light Source) , Ivan P. Parkin (University College London)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Acs Applied Materials & Interfaces

State: Published (Approved)
Published: March 2019

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 (TNT) and pentaerythritol tetranitrate (PETN). 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 fluorescent 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.

Journal Keywords: explosive, metal-organic framework, array, luminescence, discriminant analysis, PETN

Subject Areas: Materials, Chemistry


Technical Areas: