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Title: Reactive nitrogen/oxygen species production by nitro/nitrosyl supramolecular ruthenium porphyrin complexes.
Authors: Barbosa, Marília Imaculada Frazão
Gimenez Parra, Gustavo
Correa, Rodrigo de Souza
Sampaio, Renato Neiva
Magno, Lais Nogueira
Silva, Rodrigo Costa
Doriguetto, Antônio Carlos
Ellena, Javier Alcides
Barbosa Neto, Newton Martins
Batista, Alzir Azevedo
Gonçalves, Pablo José
Keywords: Photorelease
Triplet states
Photophysical properties
Issue Date: 2017
Citation: BARBOSA, M. I. F. et al. Reactive nitrogen/oxygen species production by nitro/nitrosyl supramolecular ruthenium porphyrin complexes Journal of Photochemistry and Photobiology. A, Chemistry, v. 338, p. 152-160, abr. 2017. Disponível em: <>. Acesso em: 15 set. 2017.
Abstract: This manuscript reports on new nitro/nitrosyl Ru-based complexes, which were synthesized with the purpose of using them as precursors to obtain supramolecular ruthenium porphyrin species ({TPyP[Ru (NO2)(5,50-Mebipy)2]4}(PF6)4) and ({TPyP[Ru(NO)(5,50-Mebipy)2]4}(PF6)12). The photochemical and photophysical properties of these porphyrin species were investigated. Results show that the complex containing nitrite is able to produce NO by homolytic O—NO cleavage (FPPh NO = 0.05) while the {TPyP[Ru (NO)(5,50-Mebipy)2]4}(PF6)12 does it by direct labilization (FPPh NO = 0.53) of the Ru NO bond. Furthermore, a triplet quantum yield of 0.09 and 0.27 was observed for complexes containing nitrite and nitric oxide, respectively. The reactive oxygen species quantum yield for the complex {TPyP[Ru(NO) (5,50-Mebipy)2]4}(PF6)12 (0.78) is consistent with the sum of quantum yields NO release (0.53) and triplet state (0.27), which suggests that both processes participate in the formation of the reactive species. Our results show that combining these characteristics, NO production and triplet states, on the same platform could induce a synergic effect, leading to a considerable improvement in the photodynamic action of these complexes.
ISSN:  1010-6030
metadata.dc.rights.license: O periódico Journal of Photochemistry and Photobiology A: Chemistry concede permissão para depósito deste artigo no Repositório Institucional da UFOP. Número da licença: 4211380029105.
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