Synthesis and characterization of oligomers contain phenylhydrazyne unit via oxidative polycondensation: Adsorption studies, kinetic modeling and validation methods

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dc.authorid0000-0002-9813-2962
dc.contributor.authorBayir, Erdal
dc.contributor.authorSolmaz, Adnan
dc.contributor.authorKaya, Ismet
dc.contributor.authorYagmur, Hatice Karaer
dc.date.accessioned2026-02-03T12:02:40Z
dc.date.available2026-02-03T12:02:40Z
dc.date.issued2025
dc.departmentÇanakkale Onsekiz Mart Üniversitesi
dc.description.abstractIn this study, 4-((2-phenylhydrazono)methyl)benzene-1,2-diol (4-PHBD) Schiff base was obtained from the condensation reaction between 3,4-dihydroxybenzaldehyde (3,4-DHBA) and phenylhydrazine (PH). The obtained Schiff base (4-PHBD) was polymerized using H2O2, NaOCl, and O2 oxidants in an aqueous basic medium (10 % KOH) and 4-PHBD was converted to o-(4-PHBD)-P (by H2O2 oxidant), o-(4-PHBD)-H (by NaOCl oxidant) and o-(4-PHBD)-O (by O2 oxidant). The structures of Schiff base and oligomers were characterized with FT-IR, NMR, SEM, TGA, UV-Vis, CV and GPC measurements. The Cyclic Voltammetry and UV-Vis measurements were used to ascertain the compounds' optical (Eg) and electrochemical (Eg') band gaps, respectively. The Eg values of o-(4-PHBD)-P, o-(4-PHBD)-O and o-(4-PHBD)-H were found be 2.99, 2.63 and 3.26 eV, respectively. o-(4-PHBD)-O was used as an adsorbent in the removal of methylene green (MG) from an aqueous solution. The obtained data were applied to pseudo-first order and pseudo-second order kinetic models. It was determined that the adsorption process obeyed the pseudo first order kinetic model. The kinetic model was validated with R2, RMSE, SSE, SD, Delta qe (%), MSE and ARE validation methods. The activation energy (Ea) was calculated as 7.31 kJ mol-1 using the Arrhenius equation. It was determined that the adsorption of MG on o-(4-PHBD)-O was physical adsorption.
dc.identifier.doi10.1016/j.molstruc.2025.143240
dc.identifier.issn0022-2860
dc.identifier.issn1872-8014
dc.identifier.scopus2-s2.0-105009878855
dc.identifier.scopusqualityQ1
dc.identifier.urihttps://doi.org/10.1016/j.molstruc.2025.143240
dc.identifier.urihttps://hdl.handle.net/20.500.12428/34815
dc.identifier.volume1346
dc.identifier.wosWOS:001532911600001
dc.identifier.wosqualityQ2
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherElsevier
dc.relation.ispartofJournal of Molecular Structure
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.snmzKA_WOS_20260130
dc.subjectSchiff base
dc.subjectOxidative polycondensation
dc.subjectElectrochemical properties
dc.subjectValidation methods
dc.subjectAdsorption
dc.titleSynthesis and characterization of oligomers contain phenylhydrazyne unit via oxidative polycondensation: Adsorption studies, kinetic modeling and validation methods
dc.typeArticle

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