Fiber optic pH sensing with long wavelength excitable Schiff bases in the pH range of 7.0-12.0

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dc.contributor.authorDerinkuyu S.
dc.contributor.authorErtekin K.
dc.contributor.authorOter O.
dc.contributor.authorDenizalti S.
dc.contributor.authorCetinkaya E.
dc.date.accessioned2019-10-26T23:59:40Z
dc.date.available2019-10-26T23:59:40Z
dc.date.issued2007
dc.departmentEge Üniversitesien_US
dc.description.abstractMost of the fluorescent pH probes work near neutral or acidic regions of the pH scale. In this work, two different fluorescent Schiff bases, chloro phenyl imino propenyl aniline (CPIPA) and nitro phenyl imino propenyl aniline (NPIPA), have been investigated for pH sensing in the alkaline region. Absorption and emission based spectral data, quantum yield, fluorescence lifetime, photostability and acidity constant (pKa) of the Schiff bases were determined in conventional solvents and in PVC. The long wavelength excitable immobilized Schiff bases CPIPA (?ex = 556 nm) and NPIPA (?ex = 570 nm) exhibited absorption and emission based optical response to proton in the pH range of 8.0-12.0 and 7.0-12.0, respectively. Response of the CPIPA was fully reversible within the dynamic working range. The response times were between 3-13 min. A relative signal change of 95% and 96% have been achieved for sensor dyes of CPIPA and NPIPA, respectively. The CPIPA displayed better fluorescence quantum yield (?{symbol}F = 3.7 × 10-1) and higher matrix compatibility compared to NPIPA (?{symbol}F = 1.6 × 10-1) in immobilized PVC. The CPIPA and NPIPA exhibited a slight cross sensitivity to the ions of Hg+ and Fe3+, respectively. © 2007 Elsevier B.V. All rights reserved.en_US
dc.description.sponsorship104M268en_US
dc.description.sponsorshipWe thank Prof. Dr. Jean-Marie Salmon and Dr. Anne-Cecile Ribou for allowing time resolved based studies in their laboratory. Funding for this research was provided by the TUBITAK (Kariyer Project—104M268) and Scientific Research Funds of Dokuz Eylul University (Project No.: 2005 KB Fen 18). --en_US
dc.identifier.doi10.1016/j.aca.2007.01.070en_US
dc.identifier.endpage49en_US
dc.identifier.issn0003-2670
dc.identifier.issue1en_US
dc.identifier.pmid17386792en_US
dc.identifier.scopusqualityQ1en_US
dc.identifier.startpage42en_US
dc.identifier.urihttps://doi.org/10.1016/j.aca.2007.01.070
dc.identifier.urihttps://hdl.handle.net/11454/21435
dc.identifier.volume588en_US
dc.indekslendigikaynakScopusen_US
dc.indekslendigikaynakPubMeden_US
dc.language.isoenen_US
dc.relation.ispartofAnalytica Chimica Actaen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectFiber optic pH sensoren_US
dc.subjectFluorescent pH indicatoren_US
dc.subjectSchiff baseen_US
dc.titleFiber optic pH sensing with long wavelength excitable Schiff bases in the pH range of 7.0-12.0en_US
dc.typeArticleen_US

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