Utilize este identificador para referenciar este registo:
https://hdl.handle.net/1822/78288
Título: | Push-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-chave: | Heterocyclic push-pull dyes Thiophene Pyrrole Dye-sensitized solar cells Auxiliary donor/acceptor heterocycles Synthesis auxiliary donor acceptor heterocycles |
Data: | 2022 |
Editora: | Multidisciplinary Digital Publishing Institute (MDPI) |
Revista: | Coatings |
Citação: | Fernandes, 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. |
Tipo: | Artigo |
URI: | https://hdl.handle.net/1822/78288 |
DOI: | 10.3390/coatings12010034 |
e-ISSN: | 2079-6412 |
Versão da editora: | https://www.mdpi.com/2079-6412/12/1/34 |
Arbitragem científica: | yes |
Acesso: | Acesso aberto |
Aparece nas coleções: | CDQuim - Artigos (Papers) |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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coatings-12-00034-v2.pdf | 1,38 MB | Adobe PDF | Ver/Abrir |
Este trabalho está licenciado sob uma Licença Creative Commons