Utilize este identificador para referenciar este registo: https://hdl.handle.net/1822/78288

TítuloPush-pull heterocyclic dyes based on pyrrole and thiophene: synthesis and evaluation of their optical, redox and photovoltaic properties
Autor(es)Fernandes, Sara Sofia Marques
Castro, Maria Cidália Rodrigues
Ivanou, Dzmitry
Mendes, Adélio
Raposo, M. Manuela M.
Palavras-chaveHeterocyclic push-pull dyes
Thiophene
Pyrrole
Dye-sensitized solar cells
Auxiliary donor/acceptor heterocycles
Synthesis
auxiliary donor
acceptor heterocycles
Data2022
EditoraMultidisciplinary Digital Publishing Institute (MDPI)
RevistaCoatings
CitaçãoFernandes, S.S.M.; Castro, M.C.R.; Ivanou, D.; Mendes, A.; Raposo, M.M.M. Push-Pull Heterocyclic Dyes Based on Pyrrole and Thiophene: Synthesis and Evaluation of Their Optical, Redox and Photovoltaic Properties. Coatings 2022, 12, 34. https://doi.org/10.3390/coatings12010034
Resumo(s)Three heterocyclic dyes were synthesized having in mind the changes in the photovoltaic, optical and redox properties by functionalization of 5-aryl-thieno[3,2-<i>b</i>]thiophene, 5-arylthiophene and <i>bis</i>-methylpyrrolylthiophene π-bridges with different donor, acceptor/anchoring groups. Knoevenagel condensation of the aldehyde precursors with 2-cyanoacetic acid was used to prepare the donor-acceptor functionalized heterocyclic molecules. These organic metal-free dyes are constituted by thieno[3,2-<i>b</i>]thiophene, arylthiophene, <i>bis</i>-methylpyrrolylthiophene, spacers and one or two cyanoacetic acid acceptor groups and different electron donor groups (alkoxyl, and pyrrole electron-rich heterocycle). The evaluation of the redox, optical and photovoltaic properties of these compounds indicate that 5-aryl-thieno[3,2-<i>b</i>]thiophene-based dye functionalized with an ethoxyl electron donor and a cyanoacetic acid electron acceptor group/anchoring moiety displays as sensitizer for DSSCs the best conversion efficiency (2.21%). It is mainly assigned to the higher molar extinction coefficient, long π-conjugation of the heterocyclic system, higher oxidation potential and strong electron donating capacity of the ethoxyl group compared to the pirrolyl moiety.
TipoArtigo
URIhttps://hdl.handle.net/1822/78288
DOI10.3390/coatings12010034
e-ISSN2079-6412
Versão da editorahttps://www.mdpi.com/2079-6412/12/1/34
Arbitragem científicayes
AcessoAcesso aberto
Aparece nas coleções:CDQuim - Artigos (Papers)

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