| Texto completo | |
| Autor(es): |
Veiga, Elaine Teixeira
;
Mueller, Andressa Vidal
;
Ramos, Luiz Duarte
;
Morelli Frin, Karina Passalacqua
;
Polo, Andre Sarto
Número total de Autores: 5
|
| Tipo de documento: | Artigo Científico |
| Fonte: | European Journal of Inorganic Chemistry; v. N/A, n. 23, p. 9-pg., 2018-06-22. |
| Resumo | |
The effect of donor/acceptor substituents of phenanthroline on the ground and excited state pK(a) of Ru-II tris-heteroleptic compounds, such as cis-[Ru(R-phen)(dcbH(2))(NCS)(2)], where R = H, Me-2, Me-4, Ph-2, and Cbz(2), was investigated, as well as their effect on dye adsorption on a TiO2 surface. It was determined that, aside from the long distance between the substituent and acid site on the molecule, the pK(a) followed the same trend found for uncoordinated ligands; slightly higher pK(a) values were determined for compounds with donor substituents. A linear correlation suggested that the acid-base properties of the dyes have a direct relationship to the amount of dye adsorbed onto the TiO2 surface as well as their molecular volumes. Solar cells prepared using such dyes exhibited IPCE values up to 77% at 520 nm. These results are important for understanding the effect of ancillary ligands on the acid-base properties of ruthenium compounds and the TiO2 surface coverage, which can lead to the development of new and efficient dyes for energy conversion devices. (AU) | |
| Processo FAPESP: | 16/25900-2 - Desenvolvimento de células solares a base de perovskitas |
| Beneficiário: | Elaine Teixeira Veiga |
| Modalidade de apoio: | Bolsas no Brasil - Mestrado |
| Processo FAPESP: | 17/18063-0 - Avaliação de compostos luminescentes de Re(I) em bioimagem e/ou como agentes antitumorais |
| Beneficiário: | Karina Passalacqua Morelli Frin |
| Modalidade de apoio: | Auxílio à Pesquisa - Regular |
| Processo FAPESP: | 16/24020-9 - Avaliação de processos fotoassistidos por compostos polipiridínicos de Ru(II) e re(i) |
| Beneficiário: | Andressa Vidal Muller |
| Modalidade de apoio: | Bolsas no Brasil - Doutorado |
| Processo FAPESP: | 16/21993-6 - Avaliação de compostos polipiridínicos de Ru(II) e Re(I) em dispositivos fotoativos |
| Beneficiário: | André Sarto Polo |
| Modalidade de apoio: | Auxílio à Pesquisa - Regular |