Carbazole-based Schiff base: A sensitive fluorescent ‘turn-on’ chemosensor for recognition of Al(III) ions in aqueous-alcohol media

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dc.authoridKaya, İsmet / 0000-0002-9813-2962
dc.authoridKolcu, Feyza / 0000-0002-2004-8859
dc.contributor.authorKolcu, Feyza
dc.contributor.authorKaya, İsmet
dc.date.accessioned2025-01-27T20:57:43Z
dc.date.available2025-01-27T20:57:43Z
dc.date.issued2022
dc.departmentÇanakkale Onsekiz Mart Üniversitesi
dc.descriptionThis is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).
dc.description.abstractCarbazole-based Schiff base chemosensor was synthesized in one-pot synthesis using 2hydroxy-1-naphtaldehyde for fluorescent sensing of Al3+ ions. Characterization of the ligand (L) was revealed through spectroscopic and physicochemical techniques. The fluorescence emission responses of L to various metal ions and anions were investigated. The chelation was studied by UV-vis, 1H NMR, LC-MS/MS, fluorescence titration and Job's plot analysis. Bathochromic shift resulted from charge transfer from L to electrophilic Al3+ ion was observed in the chelation of L with Al3+. The potentiality of L to be a distinguished probe to detect Al3+ ions was due to a chelation enhanced fluorescence (CHEF) effect, concomitant with noticeable fluorescent enhancement. A significant fluorescence enhancement at 533 nm was observed in ethanol-water (1:1, v/v) solution upon addition of Al3+ along with a distinct color change from yellow to white. Non-fluorescent ligand exposed highly sensitive turn-on fluorescent sensor behavior for selectively sensing Al3+ ions via 1:1 (ligand:metal) stoichiometry. The ligand's specificity in the existence of other tested metal ions and anions indicated no observation in color change. The ligand-Al3+ complex formation was reversible upon addition of chelating agent EDTA. The ligand interacted with Al3+ ions with an association constant of Ka = 5 x 104 M-1. The limit of detection (LOD) was found to be 2.59 x 10-7 M. The synthesized Schiff base could efficiently detect Al3+ ions as a fluorescent sensor. (c) 2022 Published by Elsevier B.V. on behalf of King Saud University. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).
dc.identifier.doi10.1016/j.arabjc.2022.103935
dc.identifier.issn1878-5352
dc.identifier.issn1878-5379
dc.identifier.issue7
dc.identifier.scopus2-s2.0-85129497067
dc.identifier.scopusqualityQ1
dc.identifier.urihttps://doi.org/10.1016/j.arabjc.2022.103935
dc.identifier.urihttps://hdl.handle.net/20.500.12428/26462
dc.identifier.volume15
dc.identifier.wosWOS:000804191000009
dc.identifier.wosqualityQ2
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherElsevier
dc.relation.ispartofArabian Journal of Chemistry
dc.relation.publicationcategoryinfo:eu-repo/semantics/openAccess
dc.rightsinfo:eu-repo/semantics/openAccess
dc.snmzKA_WoS_20250125
dc.subjectSchiff base
dc.subjectFluorescent chemosensor
dc.subjectESIPT
dc.subjectAl3+
dc.subjectJob?s plot
dc.subjectCHEF effect
dc.titleCarbazole-based Schiff base: A sensitive fluorescent ‘turn-on’ chemosensor for recognition of Al(III) ions in aqueous-alcohol media
dc.typeArticle

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