| Texto completo | |
| Autor(es): Mostrar menos - |
Goncalves Mateus, Douglas Braz
[1]
;
da Silva Souza, Samya
[1]
;
de Bacchi Silva, Ricardo Junior
[1]
;
de Lima Batista, Ana Paula
[1]
;
Cicolani, Renato Salviato
[1]
;
Murie, Valter Eduardo
[2]
;
Nishimura, Rodolfo Hideki
[2]
;
Clososki, Giuliano Cesar
[1, 2]
;
Sampaio de Oliveira Filho, Antonio Gustavo
[1]
;
Demets, Gregoire Jean-Francois
[1]
;
Nikolaou, Sofia
[1]
Número total de Autores: 11
|
| Afiliação do(s) autor(es): | [1] Univ Sao Paulo, Fac Filosofia Ciencias & Letras Ribeirao Preto, Dept Quim, Av Bandeirantes 3900, BR-14040901 Ribeirao Preto, SP - Brazil
[2] Univ Sao Paulo, Fac Ciencias Farmaceut Ribeirao Preto, Dept Fis & Quim, Av Cafe S-N, BR-14040903 Ribeirao Preto, SP - Brazil
Número total de Afiliações: 2
|
| Tipo de documento: | Artigo Científico |
| Fonte: | JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY; v. 391, MAR 15 2020. |
| Citações Web of Science: | 0 |
| Resumo | |
A synthetic route for attaining the combination of an electroactive unit with the chromophore N-(4-pyridyl)-1,8-naphthalimide (NI-py) was developed, yielding the trinuclear ruthenium cluster {[}Ru3O(CH3COO)(6)(NI-pY)3]FF6 (1). Due to the presence of one unpaired electron in the {[}Ru3O(CH3C00)6](+) unit, 1H NMR analysis showed paramagnetic shifts in the NI-py hydrogens by displacing, for example, hydrogen ortho to the N-heteroatom in the free ligand from 8.83 ppm to 0.73 ppm in the coordinated ligand. The electronic spectrum of 1 showed absorption at 696 nm (metal -to -metal transitions of the {[}Ru3O(CH3COO)(6)] unit), and a band at 334 nm, assigned to cluster-NI-py charge transfer superimposed with the low energy pi-pi{*} NI transitions. The latter band did not show any shifts upon coordination or change in the formal charge of the {[}Ru3O(CH3COO)(6)] core, suggesting that the electronic states involved in these transitions are not perturbed significantly upon complexation. However, the comparison of both NI-py and complex luminescence spectra indicated that the metal unit can quench NI-py fluorescence. The computational calculations confirmed the electronic delocalization over the {[}Ru3O (CH3COO)(6)](+) core in the ground state and the superposition of both NI-py pi ->pi{*} and the CLCT bands. A film, assembled on a FTO electrode surface by adsorption, showed the redox pair {[}Ru3O(CH3COO)(6)](+1/0) at 0.365 V vs. SHE, which is in accordance with the NI-py strong pi-acid character. This film was electrochromic, being blue for {[}Ru3O(CH3COO)(6)(NI-py)(3)](+) and yellow for {[}Ru3O(CH3COO)(6)(NI-py)(3)](0). (AU) | |
| Processo FAPESP: | 18/18060-3 - Uso de estruturas supramoleculares inorgânicas com vistas ao desenvolvimento de moléculas funcionais e liberação controlada de espécies bioativas |
| Beneficiário: | Sofia Nikolaou |
| Modalidade de apoio: | Auxílio à Pesquisa - Regular |