Zobrazeno 1 - 10
of 160
pro vyhledávání: '"Eufrânio N. da Silva"'
Autor:
Renata G. Almeida, Oshadie De Silva, Fábio G. Delolo, Maria H. Araujo, Subashani Maniam, Eufrânio N. da Silva Júnior
Publikováno v:
Advanced Energy & Sustainability Research, Vol 5, Iss 10, Pp n/a-n/a (2024)
A water‐soluble anthraquinone derived from alizarin, 3HAAQ, is introduced as the redox‐active material in a negative potential electrolyte (anolyte) for aqueous redox flow batteries operating at pH 14. The synthesis of 3HAAQ is carried out using
Externí odkaz:
https://doaj.org/article/9ded41270afe4d29affcd72832da307a
Autor:
Renato L. Carvalho, Amanda S. de Miranda, Mateus P. Nunes, Roberto S. Gomes, Guilherme A. M. Jardim, Eufrânio N. da Silva Júnior
Publikováno v:
Beilstein Journal of Organic Chemistry, Vol 17, Iss 1, Pp 1849-1938 (2021)
Several valuable biologically active molecules can be obtained through C–H activation processes. However, the use of expensive and not readily accessible catalysts complicates the process of pharmacological application of these compounds. A plausib
Externí odkaz:
https://doaj.org/article/a3f1c9dff0004b0da93e5730b7c08e68
Publikováno v:
Beilstein Journal of Organic Chemistry, Vol 17, Iss 1, Pp 762-770 (2021)
Desulfonylative alkylation of N-tosyl-1,2,3-triazoles under metal-free conditions leading to β-triazolylenones is reported here. The present study encompasses the synthesis of triazoles with a new substitution pattern in a single step from cyclic 1,
Externí odkaz:
https://doaj.org/article/578d724c914f49a68161f999984706c9
Autor:
Joyce C. Oliveira, Renato L. de Carvalho, Hugo G. S. Sampaio, João Honorato, Javier A. Ellena, Felipe T. Martins, João V. M. Pereira, Pedro M. S. Costa, Claudia Pessoa, Rafaela S. Ferreira, Maria H. Araújo, Claus Jacob, Eufrânio N. da Silva Júnior
Publikováno v:
Molecules, Vol 28, Iss 5, p 2222 (2023)
In 2021, our research group published the prominent anticancer activity achieved through the successful combination of two redox centres (ortho-quinone/para-quinone or quinone/selenium-containing triazole) through a copper-catalyzed azide-alkyne cycl
Externí odkaz:
https://doaj.org/article/b3a8f304823c42bdb27f5004bb432af6
Autor:
Abigail E. Reese, Charles Lochenie, Ailsa Geddis, Luana A. Machado, Marcos C. de Souza, Flávia F. C. Marques, Carlos A. de Simone, Marcos M. Gouvêa, Leandro F. Pedrosa, Eufrânio N. da Silva Júnior, Marc Vendrell
Publikováno v:
Chemosensors, Vol 10, Iss 1, p 19 (2022)
Five new disubstituted 2,6-thioaryl-BODIPY dyes were synthesized via selective aromatic electrophilic substitution from commercially available thiophenols. The analysis of the photophysical properties via absorption and emission spectroscopy showed u
Externí odkaz:
https://doaj.org/article/8dfeb160bd3644399b293b60d58d1f49
Autor:
Fabio de Moliner, Aaron King, Gleiston G. Dias, Guilherme F. de Lima, Carlos A. de Simone, Eufrânio N. da Silva Júnior, Marc Vendrell
Publikováno v:
Frontiers in Chemistry, Vol 6 (2018)
We describe a new synthetic methodology for the preparation of fluorescent π-extended phenazines from the naturally-occurring naphthoquinone lapachol. These novel structures represent the first fluorogenic probes based on the phenazine scaffold for
Externí odkaz:
https://doaj.org/article/aa19c2c3806c475ca21427cddf7fff6d
Autor:
de Paula, Weder Júnior Elias, Sáfar, Gustavo de Almeida Magalhães, Júnior, Eufrânio N. da Silva, Cury, Luiz A.
Phosphorescent emissions at room temperature from solid-state self sustained film fabricated using phenazine derivative molecules blended in a solution of poly(methyl methacrylate) were investigated at steady-state experimental conditions. Stripe exc
Externí odkaz:
http://arxiv.org/abs/2302.03538
Autor:
Cynthia Demicheli, Carlos A. de Simone, Frédéric Frézard, Eufrânio N. da Silva Júnior, Cláudio L. Donnici, Elene C. Pereira-Maia, Ludmila G. de Oliveira, Meiriane M. Silva, Flávia C. S. de Paula
Publikováno v:
Molecules, Vol 16, Iss 12, Pp 10314-10323 (2011)
Antimony(V) and bismuth(V) complexes of lapachol have been synthesized by the reaction of Ph3SbCl2 or Ph3BiCl2 with lapachol (Lp) and characterized by several physicochemical techniques such as IR, and NMR spectroscopy and X-ray crystallography. The
Externí odkaz:
https://doaj.org/article/f0c874f35d0d4d628005e6321ce5c318
Autor:
Antonio A. de Souza, Maria Aline B. F. de Moura, Fabiane C. de Abreu, Marília O. F. Goulart, Eufrânio N. da Silva Jr., Antonio V. Pinto, Vitor F. Ferreira, Raúl Moscoso, Luis J. Núñez-Vergara, Juan A. Squella
Publikováno v:
Química Nova, Vol 33, Iss 10, Pp 2075-2079 (2010)
The electrochemistry of 2,2-dimethyl-(3H)-3-(N-3'-nitrophenylamino)naphtho[1,2- b]furan-4,5-dione ([Q]-PhNO2), on mercury was investigated. The first peak is consistent with a quasi-reversible one-electron reduction of the ortho-quinone, forming [Q
Externí odkaz:
https://doaj.org/article/cc046abb8efa4c0fbc12fd357478100a
Autor:
Guilherme A. M. Jardim, Daisy J. B. Lima, Wagner O. Valença, Bruno C. Cavalcanti, Claudia Pessoa, Jamal Rafique, Antonio L. Braga, Claus Jacob, Eufrânio N. da Silva Júnior, Eduardo H. G. da Cruz
Publikováno v:
Molecules, Vol 23, Iss 1, p 83 (2017)
In continuation of our quest for new redox-modulating catalytic antitumor molecules, selenium-containing quinone-based 1,2,3-triazoles were synthesized using rhodium-catalyzed C-H bond activation and click reactions. All compounds were evaluated agai
Externí odkaz:
https://doaj.org/article/cc4a77455cde41fcbbb5ae39e0e4b89a