Changes induced by electrochemical oxidation of poly(9,9-dioctylfluorene-alt-thiophene): towards a correlation between charge transport, molecular structure modifications and degradation

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dc.contributor.author Barbosa, Camila Gouveia [UNIFESP]
dc.contributor.author Bento, Danielly Cristina
dc.contributor.author Peres, Laura Oliveira [UNIFESP]
dc.contributor.author Louarn, Guy
dc.contributor.author de Santana, Henrique
dc.date.accessioned 2020-07-31T12:47:42Z
dc.date.available 2020-07-31T12:47:42Z
dc.date.issued 2016
dc.identifier http://dx.doi.org/10.1007/s10854-016-5107-z
dc.identifier.citation Journal Of Materials Science-Materials In Electronics. Dordrecht, v. 27, n. 10, p. 10259-10269, 2016.
dc.identifier.issn 0957-4522
dc.identifier.uri https://repositorio.unifesp.br/handle/11600/57024
dc.description.abstract In this work, an alternating copolymer of fluorene and thiophene, the poly(9,9-dioctylfluorene-alt-thiophene) (PDOF-alt-Th), was synthesized by the Suzuki coupling reaction. To confirm its molecular structure, the copolymer was characterized by means of photoelectron, vibrational and optical spectroscopies. Raman scattering and infrared absorption spectra were fully interpreted, with the support of DFT modeling. It was found that the incorporation of thiophene units along the poly(9,9-dioctylfluorene) chain caused a red shifted emission, and thus the UV-Vis spectroscopy was also used to determine the value of the optical band gap and electron affinity. Electrochemical and electrical properties were then investigated by means of cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). The values of ionization potential (Ip) and the charge transfer resistance (R-CT) at different potentials were determined. The EIS results showed an increase of conductivity at the first oxidation potential peak of the compound which was related with the formation of the thiophene radical cation. Consequently, the electroactive behavior of the copolymer was complemented by means of UV-Vis ex situ and Raman-spectroelectrochemical analysis. Finally, electrical, electrochemical and optical changes induced by electrochemical oxidation were presented, and the relationship between molecular structure modifications and charge generation are discussed. en
dc.description.sponsorship CNPq program/special visiting researcher (PVE) [401109/2014-3, 441689/2014-0]
dc.format.extent 10259-10269
dc.language.iso eng
dc.publisher Springer
dc.relation.ispartof Journal Of Materials Science-Materials In Electronics
dc.rights Acesso restrito
dc.title Changes induced by electrochemical oxidation of poly(9,9-dioctylfluorene-alt-thiophene): towards a correlation between charge transport, molecular structure modifications and degradation en
dc.type Artigo
dc.description.affiliation Univ Fed Sao Paulo, Lab Hybrid Mat, Sao Paulo, Brazil
dc.description.affiliation Univ Estadual Londrina, Dept Quim, CCE, BR-86051990 Londrina, Parana, Brazil
dc.description.affiliation Univ Nantes, CNRS, Inst Mat Jean Rouxel, F-44322 Nantes, France
dc.description.affiliationUnifesp Laboratory of Hybrid Materials, Universidade Federal de São Paulo (UNIFESP), Diadema, Brazil
dc.description.sponsorshipID CNPq: 401109/2014-3
dc.description.sponsorshipID CNPq: 441689/2014-0
dc.identifier.doi 10.1007/s10854-016-5107-z
dc.description.source Web of Science
dc.identifier.wos WOS:000384418600037
dc.coverage Dordrecht
dc.citation.volume 27
dc.citation.issue 10



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