Photoinduced step-growth polymerizations of thiophene-carbazole based covalent organic polymer

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dc.authoridKoyuncu, Sermet / 0000-0001-8352-8326
dc.authoridAltınışık, Sinem / 0000-0003-0238-0169
dc.contributor.authorÇeliker, Tuğba
dc.contributor.authorAltınışık, Sinem
dc.contributor.authorYağcı, Yusuf
dc.contributor.authorKoyuncu, Sermet
dc.date.accessioned2025-01-27T20:22:39Z
dc.date.available2025-01-27T20:22:39Z
dc.date.issued2023
dc.departmentÇanakkale Onsekiz Mart Üniversitesi
dc.description.abstractA novel metal-free photochemical method for the synthesis of porous conjugated polymers was used to investigate the effects of introducing thiophene co-monomer to the carbazole-based polymer, 4,4′-bis(3,6-di(thiophen-2-yl)-9H-carbazol-9-yl)-1,1′-biphenyl (CBP–Th), in terms of its structural, optical, electrochemical and morphological properties. Irradiation of a CBP-Th monomer solution led to the formation of a dark-colored polymer, PCBP-Th, and the role of thiophene on polymerization was investigated, involving electron transfer between CBP-Th and the iodonium ion in the exciplex produced by proton release and radical coupling reactions. The UV–Vis spectra broadened and redshifted due to the elongation of conjugation and solid-state π-π interactions by extra thiophene additive after the polymerization process. The addition of thiophene co-monomer also resulted in decreasing the onset potentials and thus slightly raised HOMO positions determined by the DPV technique. In theoretical calculations, it has been observed that the charge distribution of PCBP-Th at HOMO is over the entire conjugated structure and it has localization in thiophene-thiophene bridges at LUMO. Since the thiophene co-monomer changes the intermolecular distance, the thermal stability of PCBP-Th polymers decreases and accordingly increases the amorphous characters. According to AFM, TEM and SEM images, introducing the thiophene co-monomer led to the formation of larger clusters, resulting in a more pronounced surface texture on both the powders and thin films.
dc.identifier.doi10.1016/j.polymer.2023.126473
dc.identifier.issn0032-3861
dc.identifier.issn1873-2291
dc.identifier.scopus2-s2.0-85177827004
dc.identifier.scopusqualityQ1
dc.identifier.urihttps://doi.org/10.1016/j.polymer.2023.126473
dc.identifier.urihttps://hdl.handle.net/20.500.12428/21981
dc.identifier.volume289
dc.identifier.wosWOS:001118920900001
dc.identifier.wosqualityQ2
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherElsevier Sci Ltd
dc.relation.ispartofPolymer
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.snmzKA_WoS_20250125
dc.subjectCarbazole
dc.subjectThiophene
dc.subjectPhotoinduced electron transfer
dc.subjectPhotopolymerization
dc.subjectStep-growth polymerization
dc.subjectConjugated polymers
dc.titlePhotoinduced step-growth polymerizations of thiophene-carbazole based covalent organic polymer
dc.typeArticle

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