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Dehydroacetic acid Derived Schiff base as Selective and Sensitive Colorimetric Chemosensor for the Detection of Cu(II) ions in Aqueous Medium

Vashisht, Devika; Sharma, Shikha; Kumar, Rakesh; Saini, Vaneet; Saini, Vikram; Ibhadon, Alex; Sahoo, Subash Chandra; Sharma, Shweta; Mehta, S K; Kataria, Ramesh

Authors

Devika Vashisht

Shikha Sharma

Rakesh Kumar

Vaneet Saini

Vikram Saini

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Dr Alex Ibhadon A.O.Ibhadon@hull.ac.uk
Reader in Catalysis and Reactor Engineering

Subash Chandra Sahoo

Shweta Sharma

S K Mehta

Ramesh Kataria



Abstract

14 The deficiency, as well as overconsumption of essential metal ions, has serious health 15 implications. Hence, the design and synthesis of sensors for accurate detection of such ionic 16 species are of great significance. We report the synthesis and characterization of a yellow-17 coloured Dehydroacetic acid-based chemosensor DHB ((E)-N-(1-(2-hydroxy-6-methyl-4-oxo-18 4H-pyran-3-yl) ethylidene) benzohydrazide for a quick and affordable copper detection. A 19 naked-eye visible colour transition from light yellowish to bluish green was observed instantly 20 following Cu 2+ addition. DHB did not yield colour change with any other ionic species indicating 21 its specificity. The binding of DHB to Cu 2+ caused a blue shift accompanied by an increased 22 intensity due to an intramolecular charge transfer (ICT). No interference from competitive ionic 23 species reiterated the selectivity of this probe. The outcomes of single-crystal X-ray analysis, 24 titration studies, and Job's plot indicated a 1:2 stoichiometry between Cu 2+ and DHB. The 25 experimental results matched well with the theoretical results obtained from Density Functional 26 Theory (DFT) calculations. The practical applicability of the probe for Cu 2+ estimation was 27 further determined using water samples from various sources. The sensor could detect copper as 28 low as 0.156 í µí¼‡M in an aqueous media which is very less than the permissible value of 20 í µí¼‡M in 29 water. 30 31 32 33 2

Journal Article Type Article
Publication Date 2020-06
Journal Micro-chemical journal
Print ISSN 0026-265X
Publisher Elsevier
Peer Reviewed Peer Reviewed
Volume 155
Article Number 104705
APA6 Citation Vashisht, D., Sharma, S., Kumar, R., Saini, V., Saini, V., Ibhadon, A., …Kataria, R. (2020). Dehydroacetic acid Derived Schiff base as Selective and Sensitive Colorimetric Chemosensor for the Detection of Cu(II) ions in Aqueous Medium. Microchemical journal, 155, https://doi.org/10.1016/j.microc.2020.104705
DOI https://doi.org/10.1016/j.microc.2020.104705
Keywords Colorimetric detectionCu(II)Schiff's base; Chemosensor; Dehydroacetic acid; DFT calculations; X-ray diffraction
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