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A highly selective novel multiple amide based Schiff base optical chemosensor for rapid detection of Cu2+ and its applications in real sample analysis, molecular logic gate and smart phone

•A novel multiple amide based Schiff base chemosensor l has been designed rationally for selective colorimetric detection of Cu2+ ion.•A 2:1 fashion and the binding sites were confirmed by the X-ray single crystal structure of host-guest complex.•Solvent dependant crystal structure from a homoleptic...

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Bibliographic Details
Published in:Microchemical journal 2020-09, Vol.157, p.104860, Article 104860
Main Authors: Manna, Amit Kumar, Sahu, Meman, Rout, Kalyani, Das, Uttam K., Patra, Goutam K.
Format: Article
Language:English
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Summary:•A novel multiple amide based Schiff base chemosensor l has been designed rationally for selective colorimetric detection of Cu2+ ion.•A 2:1 fashion and the binding sites were confirmed by the X-ray single crystal structure of host-guest complex.•Solvent dependant crystal structure from a homoleptic monomer to 2D polymer was observed.•The chemosensor l has been applied for construction of binary logical device, recovery of contaminated water samples and smart-phone based analysis. A novel multiple amide based Schiff base chemosensor L has been designed rationally for selective colorimetric detection of Cu2+ ion in CH3OHH2O (1:1 v/v, tris HCl buffer 10 µM, pH = 7.2) solution. The colour change (colourless to yellow) is so prominent to be visible in bare eye. From the absorption titration, job's plot measurement and ESI-MS revealed that receptor-analyte binding occurs in a 2:1 fashion and the binding sites were confirmed by the X-ray single crystal structure of host-guest complex. Solvent dependent crystal structure from a homoleptic monomer to 2D polymer was observed. The detection limit was found to be 1.8 µM with the association constant value 1.3 × 102 M−1/2 which is highly desirable for 2:1 complexes. The chemosensor L has been applied for construction of binary logical device, recovery of contaminated water samples and smart-phone based analysis. [Display omitted]
ISSN:0026-265X
1095-9149
DOI:10.1016/j.microc.2020.104860