A new low band gap electrochromic polymer containing 2,5-bis-dithienyl-1H-pyrrole and 2,1,3-benzoselenadiazole moiety with high contrast ratio

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dc.authoridKoyuncu, Sermet/0000-0001-8352-8326
dc.contributor.authorKoyuncu, Fatma Baycan
dc.contributor.authorSefer, Emre
dc.contributor.authorKoyuncu, Sermet
dc.contributor.authorOzdemir, Eyup
dc.date.accessioned2025-01-27T20:35:10Z
dc.date.available2025-01-27T20:35:10Z
dc.date.issued2011
dc.departmentÇanakkale Onsekiz Mart Üniversitesi
dc.description.abstractA new low band gap electrochromic polymer containing of 3-(2,5-di-2-thienyl-1H-pyrrol-1-yl)-9-ethyl-9H-carbazole (SNSC) and 2,1,3-benzoselenadiazole (BSe) moiety has been reported. Structural identification of initial compounds and product were carried out by using FT-IR and H-1 NMR spectroscopy results. The resulting polymer, poly(SNSC-BSe), was completely soluble in various common organic solvents and its weight-average molecular weight (M-w) were 9420 (PDI: 1.22). According to AFM results, the RMS (root mean surface) roughness of poly-(SNSC-BSe) was found to be 48.6 nm. Besides, the thermogravimetric analysis presented that the poly(SNSC-BSe) is moderately stable against to thermal effect with the initial degradation temperature at 182 degrees C. The lowest energy transition band maxima of poly(SNSC-BSe) was 498 nm in thin film and the optical band gap calculated from the onset wavelength of the optical absorption was 1.77 eV. On the other hand, the electrochemical band gap calculated from oxidation and reduction onset values was 1.60 eV, respectively. Finally, the electrochromic performance of the polymer film represents a high contrast ratio in the NIR region (51%), fast response time of about 1 s, high coloration efficiency (274 cm(2) C-1) and retained its performance by 94.6% even after 1000 cycles. (C) 2011 Elsevier Ltd. All rights reserved.
dc.description.sponsorshipScientific and Technical Research Council of Turkey (TUBITAK) [109T516]
dc.description.sponsorshipWe gratefully acknowledge the supports from Scientific and Technical Research Council of Turkey (TUBITAK, project #: 109T516) for financial support.
dc.identifier.doi10.1016/j.polymer.2011.10.017
dc.identifier.endpage5779
dc.identifier.issn0032-3861
dc.identifier.issn1873-2291
dc.identifier.issue25
dc.identifier.scopus2-s2.0-81555219357
dc.identifier.scopusqualityQ1
dc.identifier.startpage5772
dc.identifier.urihttps://doi.org/10.1016/j.polymer.2011.10.017
dc.identifier.urihttps://hdl.handle.net/20.500.12428/23587
dc.identifier.volume52
dc.identifier.wosWOS:000297539000011
dc.identifier.wosqualityQ1
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherElsevier Sci Ltd
dc.relation.ispartofPolymer
dc.relation.publicationcategoryinfo:eu-repo/semantics/openAccess
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.snmzKA_WoS_20250125
dc.subjectLow band gap polymer
dc.subjectElectrochromic materials
dc.subject2,5-bis-dithienyl-1H-pyrrole
dc.titleA new low band gap electrochromic polymer containing 2,5-bis-dithienyl-1H-pyrrole and 2,1,3-benzoselenadiazole moiety with high contrast ratio
dc.typeArticle

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