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New thiophene-based poly(azomethine)s bearing tetraphenylsilane moieties along their backbone. Optical, electronic, thermal properties and theoretical calculations

dc.contributor.authorSobarzo P.A.
dc.contributor.authorJessop I.A.
dc.contributor.authorMariman A.P.
dc.contributor.authorGonzález A.F.
dc.contributor.authorSaldías C.
dc.contributor.authorSchott E.
dc.contributor.authorZarate X.
dc.contributor.authorHauyon R.A.
dc.contributor.authorRecabarren-Gajardo G.
dc.contributor.authorGonzález-Henríquez C.M.
dc.contributor.authorTundidor-Camba A.
dc.contributor.authorTerraza C.A.
dc.date.accessioned2020-09-02T22:28:38Z
dc.date.available2020-09-02T22:28:38Z
dc.date.issued2020
dc.identifier10.1016/j.eurpolymj.2020.109658
dc.identifier.citation130, , -
dc.identifier.issn00143057
dc.identifier.urihttps://hdl.handle.net/20.500.12728/6282
dc.descriptionA new series of conjugated thiophene-based poly(azomethine)s (PAZThAs) containing tetraphenylsilane (TPS) cores and thiophene or bithiophene moieties along the backbone were obtained from silicon-containing diamines and commercial 2,5-thiophenedicarboxaldehyde and 2,2′-bithiophene-5,5′-dicarboxaldehyde through high-temperature polycondensation reactions. Solution-processable polymers were obtained in high yields (74–96%), high average molecular weight (Mw: 2,900–22,200 g/mol), with adequate polydispersity (closed to 2), and high thermal stability (T10%: 326–488 °C). The thiophene-based PAZ showed suitable absorptions and emissions in the UV–vis range with moderate Stokes shifts (46 to 65 nm). The lower band gap value was observed for PAZ2ThA2 (1.98 eV) that is closely similar to polythiophene derivates studied in polymer solar cells (PSCs). The calculated HOMO energies values are in the range of −5.82 eV to −5.42 eV, while the LUMO energies ranging from −3.56 to −3.39 eV. Compared to fully π-conjugated PThs, the PAZThAs tend to possess higher LUMO energies and similar HOMO energies, which is attributable to the electronic influence of the TPS-cores. This study motivates future researches on TPS building-blocks based PAZs. © 2020 Elsevier Ltd
dc.language.isoen
dc.publisherElsevier Ltd
dc.subjectPoly(azometine)s
dc.subjectPolythiophenes
dc.subjectSilicon-based polymers
dc.subjectSolution-processable polymers
dc.subjectEnergy gap
dc.subjectPolydispersity
dc.subjectPolymer solar cells
dc.subjectThiophene
dc.subjectAverage molecular weight
dc.subjectHigh temperature polycondensation
dc.subjectHigh thermal stability
dc.subjectPoly(azometine)s
dc.subjectPolymer solar cell (PSCs)
dc.subjectSilicon-based
dc.subjectSolution processable
dc.subjectTheoretical calculations
dc.subjectPolymers
dc.titleNew thiophene-based poly(azomethine)s bearing tetraphenylsilane moieties along their backbone. Optical, electronic, thermal properties and theoretical calculations
dc.typeArticle


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