Výsledky vyhledávání - "Fábio S. Vinhado"

Akademický článek

USO DA ESPECTROFOTOMETRIA UV-VIS PARA DIFERENCIAR AS COLORAÇÕES DO BIODIESEL DE PALMA E DO CORANTE MARCADOR DE ÓLEO DIESEL

Autor: Maria S. M. Quintino, Waldemar P. Oliveira Filho, Fábio S. Vinhado, Warley G. Santos, Rodrigo B. C. Dutra, Patrícia A. Oliveira, Patrícia K. G. Costa, Itânia P. Soares

Publikováno v: Química Nova, Vol 40, Iss 7, Pp 818-823

Currently, there are two mixtures of biodiesel/diesel fuel sold in Brazil: BX/S500 and BX /S10 (X = volume/volume biodiesel percentage; S500 and S10 = sulfur content in diesel fuels - 500 ppm and 10 ppm, respectively). In order to differentiate these

Externí odkaz: https://doaj.org/article/d85ad8cd18524664af1ccbe1e58ec1fc

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Oxidation of alkanes by iodosylbenzene (PhIO) catalysed by supported Mn(III) porphyrins: Activity and mechanism

Autor: John R. Lindsay Smith, Fábio S. Vinhado, Yassuko Iamamoto

Publikováno v: Journal of Molecular Catalysis A: Chemical. 252:23-30

Manganese(III) tetrakis(2,6-dichloro-3-sulfonatophenyl)porphyrin (1) and manganese(III) tetrakis[tetrafluoro-4-(trimethylammoniumyl)phenyl]porphyrin (2), in homogeneous solution and supported on modified silica surfaces, have been used as catalysts f

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::39e93f5f638026db3fabb5f37c977168
https://doi.org/10.1016/j.molcata.2006.01.064

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The chemical reactivity of some terpenes investigated by alumina catalyzed epoxidation with hydrogen peroxide and by DFT calculations

Autor: Ulf Schuchardt, Roberto Rinaldi, Fábio S. Vinhado, Dalmo Mandelli, Juliana Martins de Souza e Silva

Publikováno v: Journal of Molecular Catalysis A: Chemical. 252:186-193

The selectivity of the alumina catalyzed epoxidation of (S)-limonene, citronelal, citral, citronelol and (1S)-(α)-pinene with aqueous 70 wt% and anhydrous 24 wt% hydrogen peroxide is described. DFT molecular orbital calculations were used aiming at

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::145a4ff4ba256783f82fce392ef11bb0
https://doi.org/10.1016/j.molcata.2006.02.042

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Characterization of Mn(III)porphyrin immobilized on modified silica surfaces by EXAFS spectroscopy: A promising tool for analysis of supported metalloporphyrin catalysts

Autor: Fábio S. Vinhado, Alba D.Q. Ferreira, Yassuko Iamamoto

Publikováno v: Journal of Molecular Catalysis A: Chemical. 243:111-119

Herein we present the first Mn–K edge EXAFS spectra recorded for manganese(III)porphyrin catalysts containing [Mn{T(4- N -MePy)P}(L) n ] 5+ (where L = oxygenated or nitrogenated axial ligands, n = 1 or 2) grafted onto modified silica-surfaces with

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::257149ff47828013d720453ad6c12a1c
https://doi.org/10.1016/j.molcata.2005.07.039

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Novel Mn(III)chlorins as versatile catalysts for oxyfunctionalisation of hydrocarbons under homogeneous conditions

Autor: Mário M.Q. Simões, Maria G. P. M. S. Neves, Ana M. V. M. Pereira, Yassuko Iamamoto, José A. S. Cavaleiro, Maria Elisa Furlan Gandini, Fábio S. Vinhado, Augusto C. Tomé, Ana M. G. Silva, Susana L.H. Rebelo

Publikováno v: Journal of Molecular Catalysis A: Chemical. 239:138-143

The novel fluorinated metallochlorin 5,10,15,20-tetrakis(pentafluorophenyl)-tetrahydro-1 H - N -methyl-pyrrolo[3,4- b ]-porphyrinato manganese(III), Mn(chlor)-1 , and its methylated derivative, Mn(chlor)-2 , have been studied as catalysts in the oxyf

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::44c215fcb054ea567ba347021f929ed8
https://doi.org/10.1016/j.molcata.2005.06.014

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Influence of Mn(III)porphyrins with different polarities on dimyristoylphosphatidic acid monolayers

Autor: Yassuko Iamamoto, Fábio S. Vinhado, Maria Elisabete Darbello Zaniquelli, Luciano Caseli

Publikováno v: Colloids and Surfaces A: Physicochemical and Engineering Aspects. 229:169-180

The behavior of three Mn(III)porphyrins with different polarities at air/water interfaces and their interaction with the phospholipid dimyristoylphosphatidic acid (DMPA) were studied through surface potential and pressure–area isotherms. Multilayer

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::f9e693e67626e91b583ad12ec0fa5b38
https://doi.org/10.1016/j.colsurfa.2003.08.013

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Supported iron(III)porphyrins pentafluorophenyl-derivatives as catalysts in epoxidation reactions by H2O2: the role of the silica-support and sulfonatophenyl residues in the activation of the peroxidic bond

Autor: Fábio S. Vinhado, Yassuko Iamamoto, Ana Paula Masson, Otaciro R. Nascimento, Daniela Gonçalves de Abreu, Patrícia R. Martins, Ednalva A Vidoto

Publikováno v: Journal of Molecular Catalysis A: Chemical. 188:141-151

Ionic Fe(III)porphyrins pentafluorophenyl-derivatives: 5,10,15-tris(pentafluorophenyl)-20-(4-N-methylpyridyl)porphyrin iron(III) ([Fe{M(4-N-MePy)TPFP}]2+), 5,10,15-tris(4-N-methylpyridyl)-20-(pentafluorophenyl)porphyrin iron(III) ([Fe{T(4-N-MePy)MPFP

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::6af0dd11bbfd6a740459fd198977bd58
https://doi.org/10.1016/s1381-1169(02)00233-9

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Cationic manganese(III) porphyrins bound to a novel bis-functionalised silica as catalysts for hydrocarbons oxygenation by iodosylbenzene and hydrogen peroxide

Autor: Cynthia M.C Prado-Manso, Hérica C. Sacco, Fábio S. Vinhado, Yassuko Iamamoto

Publikováno v: Journal of Molecular Catalysis A: Chemical. 174:279-288

The cationic manganese porphyrins: manganese(III) 5,10,15-tris(2,6-dichlorophenyl)-20-(4- N -methylpyridyl)porphyrin ([Mn{M(4- N -MePy)TDCPP}] 2+ ), 5,10,15,20-tetra(2,3,5,6-tetrafluoro-4-trimethylammoniumphenyl)porphyrin ([Mn(TF4TMAPP)] 5+ ) and 5,1

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::a32493c7cef1c7350f1173adb0d53e20
https://doi.org/10.1016/s1381-1169(01)00200-x

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Characterization and catalytic activity of iron(III) mono(4-N-methyl pyridyl)-tris(halophenyl) porphyrins in homogeneous and heterogeneous systems

Autor: Cynthia M.C Prado-Manso, Otaciro R. Nascimento, Katia J. Ciuffi, Yassuko Iamamoto, Antonio G. Ferreira, Fábio S. Vinhado, Hérica C. Sacco, John R. Lindsay-Smith, Ednalva A Vidoto, Patrícia R. Martins

Publikováno v: Journal of Molecular Catalysis A: Chemical. 150:251-266

The synthesis, characterization and catalytic activity of the cationic iron porphyrins Fe[M(4-N-MePy)TDCPP]Cl2 and Fe[M(4-N-MePy)TFPP]Cl2 in the epoxidation of (Z)-cyclooctene by PhIO in homogeneous solution and supported on silica gel (SG), imidazol

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::700e704a9a5481c215e925e260bd1a3e
https://doi.org/10.1016/s1381-1169(99)00216-2

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Modified silicas covalently bounded to 5,10,15,20-tetrakis(2-hydroxy-5-nitrophenyl)porphyrinato iron(III): synthesis, spectroscopic and EPR characterization. Catalytic studies

Autor: Maria Elisa F. Gandini, Cláudio R. Neri, Fábio S. Vinhado, Tatiana Stedile Minorin, Otaciro R. Nascimento, Osvaldo Antônio Serra, Yassuko Iamamoto

Publikováno v: Journal of the Brazilian Chemical Society v.19 n.2 2008
Journal of the Brazilian Chemical Society
Sociedade Brasileira de Química (SBQ)
instacron:SBQ
Journal of the Brazilian Chemical Society, Volume: 19, Issue: 2, Pages: 344-351, Published: 2008

In this work we have studied cyclooctene epoxidation with PhIO, using a new iron porphyrin, 5,10,15,20-tetrakis(2-hydroxy-5-nitrophenyl)porphyrinato iron(III), supported on silica matrices via eletrostatic interaction and / or covalent bonds as catal

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::014de824bbfdbf15784388f5b86dc4ab
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532008000200022

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