Journal of Photochemistry and Photobiology A: Chemistry 357 (2018) 41–48 Contents lists available at ScienceDirect Journal of Photochemistry and Photobiology A: Chemistry journal homepa ge: www.elsev ier.com/locate/jphotochem Design and synthesis of 1,4-benzothiazine hydrazide as selective and 2+ sensitive colorimetric and turn-on ﬂuorometric sensor for Hg detection in aqueous medium Muzey Bahta, Naseem Ahmed* Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee, 247 667, UK, India A R T I C L E I N F O A B S T R A C T Article history: A highly colorimetric and ﬂuorimetric chemosensor, 3-oxo-[1,4]-benzothiazin-2-ylidene acetohydrazide Received 30 December 2017 Received in revised form 13 February 2018 (L2) is reported for the mercury detection. In HEPES-buffered solution (CH CN: H O, 1:2, v/v, pH 7.2), L2 3 2 2+ Accepted 16 February 2018 showed a characteristic absorption peak at 340 nm, after addition of Hg induces color change from light Available online 19 February 2018 yellow to purple with signiﬁcantly enhancement in absorbance at 340 nm and a new band centered at 550 nm with red-shift of 110 nm. Furthermore, the L2 exhibited high sensitivity and selectivity overall 2+ Keywords: emission change of more than 100-fold ﬂuorescence intensity enhancement towards
Journal of Photochemistry and Photobiology A: Chemistry – Elsevier
Published: Apr 15, 2018
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