Journal
DYES AND PIGMENTS
Volume 172, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.dyepig.2019.107799
Keywords
Explosive detection; Iridium(III) complex; Photoluminescence sensing; Sensors
Funding
- National Natural Science Foundation of China [51803013]
- Education Department of Jilin Province [JJKH20181119KJ]
- Jilin Association for Science and Technology [192011]
- Changchun University of Science and Technology [XQNJJ-2017-15, XJJLG-2016-06]
- Science and Technology Development Plan Project of Jilin Province [20180520003JH, 20180520166JH]
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The sensitive and selective detection of picric acid is of great importance to the society safety and human health. In this paper, a novel blue emissive iridium(III) complex FIrPicOMPBHCz containing carbazole moieties has been successfully synthesized and applied in photoluminescence (PL) sensing towards nitroaromatic explosives (e.g. PA, TNB, DNP, TNT, DNT, NP, NBA, NB) detection. The PL emission of FIrPicOMPBHCz could be quenched by the explosives with different extents. Among these, the quenching constant K-sv towards PA is the highest, which is 1.9 x 10(4) M-1, with one to two orders of magnitude higher than that of other nitroaromatics, thus demonstrating a selective PL detection of PA. The sensing mechanism is based on the excited state electron transfer process, by analyzing the UV-vis absorption, excitation and PL spectra and cyclic voltammogram results. In addition, the paper strip tests indicate a great potential of FIrPicOMPBHCz as a solid PL sensor for PA.
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