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Issue 49, 2014
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Solid polymer substrates and smart fibres for the selective visual detection of TNT both in vapour and in aqueous media

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Abstract

This work describes the design of efficient, inexpensive and easily prepared selective sensory polymers with chemically anchored amine groups as 2,4,6-trinitrotoluene (TNT)-sensing motifs as materials for the selective visual detection of TNT in aqueous media and as vapours. The materials are prepared as handleable sensory films or dense membranes from which sensory discs are cut, as well as smart fibres by coating conventional and commercial cotton fabrics. Both types of material exhibited a highly visible colour development from colourless to red upon contact with TNT both in the gas phase and in solution, and the colour change was used to build titration curves using the colour definition parameters of a digital image acquired with a smartphone, i.e., the RGB system. The materials were selective, remaining silent with other nitroaromatic compounds, such as 4-nitrotoluene and 2,4-dinitrotoluene, and the detection limit in solution was close to the micromolar range.

Graphical abstract: Solid polymer substrates and smart fibres for the selective visual detection of TNT both in vapour and in aqueous media

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Publication details

The article was received on 27 Mar 2014, accepted on 29 May 2014 and first published on 29 May 2014


Article type: Paper
DOI: 10.1039/C4RA02716G
Citation: RSC Adv., 2014,4, 25562-25568
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    Solid polymer substrates and smart fibres for the selective visual detection of TNT both in vapour and in aqueous media

    J. L. Pablos, M. Trigo-López, F. Serna, F. C. García and J. M. García, RSC Adv., 2014, 4, 25562
    DOI: 10.1039/C4RA02716G

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