Synthesis and characterization of conjugated polyphenols derived from azomethine formation containing terephtaldehyde via oxidative polycondensation

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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.accessioned2025-01-27T21:01:54Z
dc.date.available2025-01-27T21:01:54Z
dc.date.issued2016
dc.departmentÇanakkale Onsekiz Mart Üniversitesi
dc.description.abstractPreparation of conjugated aromatic polyimines, containing phenols in the backbone and side group substitutions, has been successfully achieved by a chemical oxidative polycondensation of a series of Schiff bases using NaOCl as the oxidant at optimum reaction temperature of 90 degrees C. The molecular structures of synthesized compounds were verified by the FT-IR, UV-Vis, H-1-NMR and C-13-NMR techniques. Using thermogravimetric analysis-differential thermal analysis (TG-DTA) and size exclusion chromatography (SEC), the molecular weight distribution parameters and the characterization of all compounds could be specified. The initial degradation temperatures of the polymers were found in the range of 170-271 degrees C. DSC analyses of the polyazomethines (PAMs) were carried out to assign the glass transition temperatures (T-g). UV-Vis measurements gave information about the optical (E-g) band gaps. Fluorescence measurements were carried out to obtain the maximum PL intensities. The spectral analysis outcome signified a blue and a green light emission behavior when irradiated at different wavelengths. Cyclic Voltammetry (CV) was an effective method to explore the HOMO and LUMO energy levels and electrochemical (E-g') band gaps of the polymers. The HOMO energy levels of the synthesized polyimines were lower than those of the monomers indicating the more conjugated structures of the polymers. Four-point collinear probe was used to determine the electrical conductivities of both doped and undoped states of the synthesized polymers with respect to doping time with iodine. The morphological properties of the polymers were illustrated using Scanning Electron Microscopy (SEM) images at different amplifications.
dc.description.sponsorshipCanakkale Onsekiz Mart University [FBA-2014-114]
dc.description.sponsorshipThe authors thank, Canakkale Onsekiz Mart University scientific research project commission for support with the project number (Project Nu.: FBA-2014-114).
dc.identifier.doi10.1080/10601325.2016.1176445
dc.identifier.endpage451
dc.identifier.issn1060-1325
dc.identifier.issn1520-5738
dc.identifier.issue7
dc.identifier.scopus2-s2.0-84975807152
dc.identifier.scopusqualityQ2
dc.identifier.startpage438
dc.identifier.urihttps://doi.org/10.1080/10601325.2016.1176445
dc.identifier.urihttps://hdl.handle.net/20.500.12428/27223
dc.identifier.volume53
dc.identifier.wosWOS:000379253100007
dc.identifier.wosqualityQ3
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherTaylor & Francis Inc
dc.relation.ispartofJournal of Macromolecular Science Part A-Pure and Applied Chemistry
dc.relation.publicationcategoryinfo:eu-repo/semantics/openAccess
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.snmzKA_WoS_20250125
dc.subjectOxidative polycondensation
dc.subjectterephthaldehyde
dc.subjectimine polymers
dc.subjectpolyazomethine
dc.subjectband gaps
dc.titleSynthesis and characterization of conjugated polyphenols derived from azomethine formation containing terephtaldehyde via oxidative polycondensation
dc.typeArticle

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