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Colorimetric and Fluorescent Sensing of Copper Ions in Water through o-Phenylenediamine-Derived Carbon Dots

2023-03-10Artigo científico Acesso aberto
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dc.contributor.authorPizzoferrato, Roberto
dc.contributor.authorBisauriya, Ramanand
dc.contributor.authorAntonaroli, Simonetta
dc.contributor.authorCabibbo, Marcello
dc.contributor.authorMoro, Artur J.
dc.contributor.institutionLAQV@REQUIMTE
dc.contributor.institutionDQ - Departamento de Química
dc.contributor.pblMDPI - Multidisciplinary Digital Publishing Institute
dc.date.accessioned2023-06-29T22:16:27Z
dc.date.available2023-06-29T22:16:27Z
dc.date.issued2023-03-10
dc.descriptionThis work was supported by Regione Lazio through Progetto di Ricerca POR FESR LAZIO 2014–2020 Id: A0375-2020-36403 according to G09493 del 14 July 2021. M.A. has been supported by MIUR—Ministero dell’Istruzione Ministero dell’Università e della Ricerca (Ministry of Education, University and Research) under the national project FSE/FESR–PON Ricerca e Innovazione 2014–2020 (N° AIM1887574, CUP: E18H19000350007). Publisher Copyright: © 2023 by the authors.
dc.description.abstractFluorescent nitrogen and sulfur co-doped carbon dots (NSCDs) were synthesized using a simple one-step hydrothermal method starting from o-phenylenediamine (OPD) and ammonium sulfide. The prepared NSCDs presented a selective dual optical response to Cu(II) in water through the arising of an absorption band at 660 nm and simultaneous fluorescence enhancement at 564 nm. The first effect was attributed to formation of cuprammonium complexes through coordination with amino functional groups of NSCDs. Alternatively, fluorescence enhancement can be explained by the oxidation of residual OPD bound to NSCDs. Both absorbance and fluorescence showed a linear increase with an increase of Cu(II) concentration in the range 1–100 µM, with the lowest detection limit of 100 nM and 1 µM, respectively. NSCDs were successfully incorporated in a hydrogel agarose matrix for easier handling and application to sensing. The formation of cuprammonium complexes was strongly hampered in an agarose matrix while oxidation of OPD was still effective. As a result, color variations could be perceived both under white light and UV light for concentrations as low as 10 µM. Since these color changes were similarly perceived in tap and lake water samples, the present method could be a promising candidate for simple, cost-effective visual monitoring of copper onsite.en
dc.description.versionpublishersversion
dc.description.versionpublished
dc.format.extent15
dc.format.extent33514689
dc.identifier.doi10.3390/s23063029
dc.identifier.issn1424-8220
dc.identifier.otherPURE: 64819782
dc.identifier.otherPURE UUID: a548f6ed-a832-41f5-8ab4-05c001eaaaf4
dc.identifier.otherScopus: 85151221528
dc.identifier.otherWOS: 000959894400001
dc.identifier.otherPubMed: 36991739
dc.identifier.otherPubMedCentral: PMC10056730
dc.identifier.urihttp://hdl.handle.net/10362/154615
dc.identifier.urlhttps://www.scopus.com/pages/publications/85151221528
dc.language.isoeng
dc.peerreviewedyes
dc.relationFunding Information: info:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDB%2F50006%2F2020/PT
dc.relationinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDP%2F50006%2F2020/PT
dc.relationAssociated Laboratory for Green Chemistry - Clean Technologies and Processes
dc.subjectagarose hydrogel
dc.subjectcarbon dots
dc.subjectcolorimetric
dc.subjectcopper
dc.subjectfluorescence
dc.subjecto-Phenylenediamine
dc.subjectoptical sensing
dc.subjectAnalytical Chemistry
dc.subjectInformation Systems
dc.subjectBiochemistry
dc.subjectAtomic and Molecular Physics, and Optics
dc.subjectInstrumentation
dc.subjectElectrical and Electronic Engineering
dc.titleColorimetric and Fluorescent Sensing of Copper Ions in Water through o-Phenylenediamine-Derived Carbon Dotsen
dc.typejournal article
degois.publication.issue6
degois.publication.titleSensors
degois.publication.volume23
dspace.entity.typePublication
oaire.awardNumberUIDP/50006/2020
oaire.awardTitleAssociated Laboratory for Green Chemistry - Clean Technologies and Processes
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDP%2F50006%2F2020/PT
oaire.fundingStream6817 - DCRRNI ID
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.rightsopenAccess
relation.isProjectOfPublication4d9a4d40-4803-4f3a-976b-d6eaaef42510
relation.isProjectOfPublication.latestForDiscovery4d9a4d40-4803-4f3a-976b-d6eaaef42510

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