A new colorimetric chemosensors for Cu2+ and Cd2+ ions detection: Application in environmental water samples and analytical method validation

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dc.contributor.authorTekuri, V.
dc.contributor.authorTrivedi, D.R.
dc.date.accessioned2026-02-05T09:32:20Z
dc.date.issued2017
dc.description.abstractA new heterocyclic thiophene-2-caboxylic acid hydrazide based chemosensor R1 to R4 were designed, synthesized and characterized by various spectroscopic techniques like FT-IR, UV-Vis, 1H NMR, 13C NMR, Mass and SC-XRD. The chemosensor R3 showed a significant color change from colorless to yellow in the presence of Cu2+ ions and chemosensor R4 showed a significant color change from colorless to yellow in the presence of Cd2+ ions over the other tested cations such as Cr3+, Mn2+, Fe2+, Fe3+, Co2+, Ni2+, Zn2+, Ag2+, Al3+, Pb2+, Hg2+, K+, Ca2+ and Mg2+. The high selective and sensitivity of R3 towards Cu2+ and R4 towards Cd2+ ions was confirmed by UV-Vis spectroscopic study. The R3 showed a red shift in the presence of Cu2+ ions by ??<inf>max</inf> 67 nm and R4 showed a red shift in the presence of Cd2+ ions by ??<inf>max</inf> 105 nm in the absorption spectrum. The binding stoichiometric ratio of the complex between R3 - Cu2+ and R4 - Cd2+ ions have been found to be 1:1 using the B-H plot. Under optimized experimental conditions, the R3 and R4 exhibits a dynamic linear absorption response range, from 0 to 50 ?M for Cu2+ ions and 0 to 30 ?M for Cd2+ ions, with the detection limit of 2.8 × 10?6 M for Cu2+ and 2.0 × 10?7 M for Cd2+ ions. The proposed analytical method for the quantitative determination of Cu2+ and Cd2+ ions was validated and successfully applied for the environmental samples with good precision and accuracy. © 2017 Elsevier B.V.
dc.identifier.citationAnalytica Chimica Acta, 2017, 972, , pp. 81-93
dc.identifier.issn32670
dc.identifier.urihttps://doi.org/10.1016/j.aca.2017.03.035
dc.identifier.urihttps://idr.nitk.ac.in/handle/123456789/25599
dc.publisherElsevier B.V.
dc.subjectAbsorption spectroscopy
dc.subjectColor
dc.subjectColorimetry
dc.subjectDoppler effect
dc.subjectPhysiology
dc.subjectSpectroscopic analysis
dc.subjectSynthesis (chemical)
dc.subjectAnalytical method validation
dc.subjectAssociation constant
dc.subjectColorimetric chemosensor
dc.subjectEnvironmental water samples
dc.subjectExperimental conditions
dc.subjectQuantitative determinations
dc.subjectSpectroscopic studies
dc.subjectSpectroscopic technique
dc.subjectIons
dc.subjectcadmium
dc.subjectcupric ion
dc.subjectabsorption spectroscopy
dc.subjectArticle
dc.subjectassociation constant
dc.subjectbinding affinity
dc.subjectcolorimetry
dc.subjectcontrolled study
dc.subjectinfrared spectroscopy
dc.subjectlimit of detection
dc.subjectlimit of quantitation
dc.subjectlinear system
dc.subjectmeasurement accuracy
dc.subjectmeasurement precision
dc.subjectpriority journal
dc.subjectprocess optimization
dc.subjectquantitative analysis
dc.subjectstoichiometry
dc.subjectstructure analysis
dc.subjectultraviolet spectroscopy
dc.subjectvalidation process
dc.subjectwater sampling
dc.titleA new colorimetric chemosensors for Cu2+ and Cd2+ ions detection: Application in environmental water samples and analytical method validation

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