Tuning the Electrochromic Properties of Fluorinated Benzochalcogenodiazole Based Donor-Acceptor Polymers

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dc.authoridKoyuncu, Sermet/0000-0001-8352-8326
dc.authoridAltinisik, Sinem/0000-0003-0238-0169
dc.contributor.authorColak, Betul
dc.contributor.authorAltinisik, Sinem
dc.contributor.authorKoyuncu, Fatma Baycan
dc.contributor.authorCanimkurbey, Betul
dc.contributor.authorKoyuncu, Sermet
dc.date.accessioned2025-01-27T20:22:41Z
dc.date.available2025-01-27T20:22:41Z
dc.date.issued2020
dc.departmentÇanakkale Onsekiz Mart Üniversitesi
dc.description.abstractIn this study, a series of benzochalcogenodiazole based donor acceptor monomers namely 4,7-bis(4-hexyl-2-thienyl)-2,1,3-benzothiadiazole (TST), 5,6-difluoro-4,7-bis(4-hexyl-2-thienyl)-2,1,3-benzothiadiazole (TST2) and 4,7-bis(4-hexyl-2-thienyl)-2,1,3-benzoselenadiazole (TSeT) were synthesized by Stille reaction and then directly polymerized on to Indium Tin Oxide coated glass (ITO/Glass) surface by electrochemical polymerization process. According to UV-Vis measurements, a 20 nm blue shift was detected at low energy band after fluorination of TST (TST2). Besides, a 40 nm red shift was observed by changing S to Se on the benzochalcogenodiazole moiety (TSeT). Thus, the optical band gaps were varied as 2.32, 2.45 and 2.16 eV for TST, TST2 and TSeT, respectively. According to AFM results, rougher surface was observed in the PTSeT thin film than that of PTST and PTST2. Thin films of electrodeposited polymers onto ITO/glass surface displayed ambipolar multi-electrochromic behavior both anodic and cathodic region. The ambipolar charge distribution was also observed in the theoretical DFT calculations. When the electrochromic performance of the polymer films was compared to each other, it was seen that the PTST2 has a better stability and higher the percentage transmittance change (Delta T%) at near-IR regime between neutral and oxidized states.
dc.description.sponsorshipCanakkale Onsekiz Mart University Research Funds Office [COMU-BAP FYL-2016-975]
dc.description.sponsorshipB. Colak and S. Koyuncu grateful to Canakkale Onsekiz Mart University Research Funds Office (Project #: COMU-BAP FYL-2016-975) for financial support.
dc.identifier.doi10.1002/slct.202003271
dc.identifier.endpage13211
dc.identifier.issn2365-6549
dc.identifier.issue42
dc.identifier.scopus2-s2.0-85096058538
dc.identifier.scopusqualityQ3
dc.identifier.startpage13202
dc.identifier.urihttps://doi.org/10.1002/slct.202003271
dc.identifier.urihttps://hdl.handle.net/20.500.12428/21991
dc.identifier.volume5
dc.identifier.wosWOS:000591276200035
dc.identifier.wosqualityQ3
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherWiley-V C H Verlag Gmbh
dc.relation.ispartofChemistryselect
dc.relation.publicationcategoryinfo:eu-repo/semantics/openAccess
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.snmzKA_WoS_20250125
dc.subjectConjugated polymers
dc.subjectDonor-Acceptor Molecules
dc.subjectElectrochromism
dc.subjectFluorination effect
dc.subjectBenzochalcogenodiazole
dc.subjectElectrochromic
dc.subjectPolymers
dc.titleTuning the Electrochromic Properties of Fluorinated Benzochalcogenodiazole Based Donor-Acceptor Polymers
dc.typeArticle

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