A fluorescent chemosensor has been developed for discriminative detection of phosgene and a nerve agent mimic diethyl chlorophosphate (DCP), which was comprised of an anthracene-carboxyimide fluorophore and o-phenylenediamine (OPD) reaction site. Upon phosphorylation of OPD, the chemosensor displays an obvious fluorescence turn-on response toward DPC at 588 nm with instant response and a low detection limit (88 nM). By contrast, the chemosensor exhibits a colorimetric and fluorescence enhancement response at 500 nm toward phosgene with fast response (<2 min), high selectivity, and a low detection limit (72 nM). Furthermore, chemosensor-loaded test membrane was fabricated for real-time, portable and efficient discriminative detection of trace amounts of gaseous phosgene and DCP vapor with different optical responses.
Bibliographical noteFunding Information:
J.-T.H. and L.Z. acknowledge grants from the Hubei Provincial Natural Science Foundation (2018CFB264), the Major Program of Technical Innovation of Hubei Province (2018ACA152), and the National Natural Science Foundation of China (nos. 21978222, 21807029). S.W. acknowledges grants from the Hubei Provincial department of Education Science and Technology Research Projects (no. Q20182704). J.Y. thanks the National Research Foundation of Korea (NRF), which was funded by the Korean government (MSIP) (no. 2012R1A3A2048814).
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