Optical pH sensor based on spectral response of newly synthesized Schiff bases

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dc.contributor.authorHazneci C.
dc.contributor.authorErtekin K.
dc.contributor.authorYenigul B.
dc.contributor.authorCetinkaya E.
dc.date.accessioned2019-10-27T00:14:19Z
dc.date.available2019-10-27T00:14:19Z
dc.date.issued2004
dc.departmentEge Üniversitesien_US
dc.description.abstractIn most of the common designs, pH optodes rely on weak acidic dyes whose dissociated and undissociated forms have different absorption or emission maximums. In this work the newly synthesized Schiff bases; N , N '-bis(4-diaminobenzyliden)-1,2-cyclohexandiamine [I], N , N '-bis(4-diaminobenzyliden)-1,2-ethanediamine [II] and 2,6-bis[(4-dimethylaminophenylimino)ethyl]pyridine [III], have been used for pH sensing in four different plasticized PVC matrices. The Schiff bases exhibited absorption and emission based optical responses to protons in the pH range of 3.0-7.8, and, therefore, can be used as an optical pH sensor for near neutral region of pH scale. The absorption and emission spectra were recorded by preparing thin films on a Mylar polyester support. Responses of the sensor slides were fully reversible within the dynamic range and the response time was approximately 3 min under batch conditions. All of the compositions exhibited a significant absorption based response to pH in immobilized form. Throughout spectroscopic studies, relative signal change of 79% has been achieved for sensor dye (I). In contrast to the weak emission peaks of (I) and (II), the sensor dye (III) exhibited a significant emission based response and is evaluated in a different category. © 2003 Elsevier Ltd. All rights reserved.en_US
dc.identifier.doi10.1016/j.dyepig.2003.11.006
dc.identifier.endpage41en_US
dc.identifier.issn0143-7208
dc.identifier.issn0143-7208en_US
dc.identifier.issue1en_US
dc.identifier.scopusqualityQ1en_US
dc.identifier.startpage35en_US
dc.identifier.urihttps://doi.org/10.1016/j.dyepig.2003.11.006
dc.identifier.urihttps://hdl.handle.net/11454/22581
dc.identifier.volume62en_US
dc.indekslendigikaynakScopusen_US
dc.language.isoenen_US
dc.relation.ispartofDyes and Pigmentsen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectOptical pH sensingen_US
dc.subjectPH sensing with Schiff basesen_US
dc.subjectPVC doped Schiff basesen_US
dc.titleOptical pH sensor based on spectral response of newly synthesized Schiff basesen_US
dc.typeArticleen_US

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