Metalloporphyrins
Mostrando 1-12 de 40 artigos, teses e dissertações.
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1. Automatized Separation of Fractions from Petroleum Based on Spectrophotometric Signal Derivative Using Open-Source Hardware for the Determination of Ni and V Linked to Porphyrins
An automated method based on open-source hardware was created for the separation of porphyrins fractions from crude oil, an essential step for the quantification of V and Ni as metalloporphyrins. Preparative liquid chromatography was implemented with a reverse phase gradient from MeOH to toluene. The system allows three solvents and fractions changes by usin
J. Braz. Chem. Soc.. Publicado em: 23/05/2019
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2. Biomimetic oxidation studies of monensin A catalyzed by metalloporphyrins: identification of hydroxyl derivative product by electrospray tandem mass spectrometry
Monensin A is an important commercially available natural product isolated from Streptomyces cinnamonensins that shows antibiotic and anti-parasitic activities. This molecule has a significant influence in the antibiotic market, but until now there are no studies on putative metabolite formations. Bioorganic catalysts applying metalloporphyrins and mono-oxyg
Rev. bras. farmacogn.. Publicado em: 09/08/2013
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3. Síntese e caracterização de heteropentâmeros formados por cobaltoftalocianina e cobaltotetrafenilporfirina
Metalloporphyrins and metalophthalocyanines assemblies have attracted in the last few decades. The syntheses of face to face systems containing porphyrins or phthalocyanines can found in literature, however few works reported these arrangements in mixed systems. A new system composed by cobaltophthalocyanine (CoPc) and cobaltotetraphenylporphyrin (CoTPP) ass
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 29/02/2012
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4. Biomimetic oxidative studies with the natural products piperine and piplartine. / Estudos oxidativos biomiméticos com os produtos naturais piperina e piplartina
Piperine and piplartine are alkaloids isolated from species of Piper genus. The choice of these molecules for this study was based on the promising biological activities presented by these substances, especially for their antitumoral potential. Based on the research of alternative ways for studying the metabolism of new drugs, especially from natural product
Publicado em: 2008
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5. Metalloporphyrins and salen complexes as a P450 biomimetic model for the metabolism of antiepileptic and antidepressant drugs / Metaloporfirinas e compostos salen como modelos biomiméticos do citocromo P450 no metabolismo de fármacos anticonvulsivante e antidepressivo
In this work, the catalytic activities of metalloporphyrins and the salen complex (Jacobsen catalyst) in solution and immobilized on different supports were studied in the oxidation of hydrocarbons, anticonvulsivant drugs (carbamazepine and primidone) and antidepressives (fluoxetine) by the following oxygen donors: hydrogen peroxide, terc-butyl hydroperoxide
Publicado em: 2008
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6. Hybrid metal-organic nanocomposites based on vandium pentoxide / Nanocompósitos híbridos metal-orgânicos baseados em pentóxido de vanádio
Nanostructured systems based on the intercalation of molecular and supramolecular species into lamellar vanadium pentoxide xerogels are focused on this Thesis. The exciting characteristics of the supramolecular systems which are closely related to the nature, interaction and organization of the chemical species involved, have been exploited aiming their appl
Publicado em: 2008
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7. Síntese de bisporfirinas contendo o espaçador 2,2-bipiridina: modelos na elaboração de sensores luminescentes de íons metálicos / Synthesis of bisporphyrins held together by the 2,2-bipyridine spacer: models in the elaboration of luminescent sensors for metal ions
In this work have been synthesized bisporphyrins held together by means of amide linkage at the 4,4position of 2,2-bipyridine, reacting the mono-functionalised aminophenyl-porphyrin (NH2PTriPP) and 4,4-diacid chloride bipyridine (DACBipy). A preliminary study was conducted for the establishment of the reaction conditions for the attainment of mono(nitropheny
Publicado em: 2008
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8. Metalloporhyrins as Biomimetical MOdels of Cytochrome P450 in the Oxidation of Pesticides / Metaloporfirinas como modelos biomiméticos do citocromo P450 na oxidação de pesticidas"
In this work we investigated the ability of metalloporphyrin model systems to mimic the action of cytochrome P450 in the oxidation of a herbicide, atrazine. To this end, we employed the second generation commercially available metalloporphyrins metal (III) 5,10,15,20-tetrakis(2,6-dichlorophenyl)porphyrin chloride [M(TDCPP)Cl] and metal (III) 5,10,15,20- tetr
Publicado em: 2006
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9. Síntese, caracterização e aplicação de catalisadores metaloporfirínicos suportados em MCM - 41
Metalloporphyrin catalysts are well known for their ability to carry out selective oxidation of organic substracts with many oxidizing agents. The current trend in the research is ancor active metalloporphyrins species on solid support, in order to achieve a better recover and reuse of these materials. Besides to prevent the formation of inactive dimmers and
Publicado em: 2006
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10. Novel synthetic methodology for metalloporphyrins in ionic liquid
5,10,15,20-Tetraarilporfirinas reagem com sais metálicos na presença do solvente brometo de 1-hexil-3-metilimidazol ([hmim][Br]) em temperatura ambiente, fornecendo as metaloprofirinas correspondentes, com rendimento entre 80-98%.
Journal of the Brazilian Chemical Society. Publicado em: 2005-06
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11. Synthesis and properties of supermolecular meso tetra(pyridyl)porphyrins and its layer-by-layer electrostatic assembled nanomaterials / Obtenção e propriedades de meso tetra(piridil)porfirinas supermoleculares e dos nanomateriais obtidos por montagem eletrostática camada por camada
A new series of nonplanar supermolecular metalloporphyrins have been obtained by coordenative self-assembly of meso-tetra(3-pyridyl)porphyrins and ruthenium complexes such as [Ru(bipy)2Cl]+ and [Ru(bipy)2(OH2)]2+. The electronic and structural properties have been investigated by electronic spectroscopy, mass spectrometry, cyclic voltammetry, and spectroelec
Publicado em: 2005
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12. Catálise oxidativa de clusters de rutênio e porfirinas supramoleculares / Oxidative catalysis of ruthenium clusters and supramolecular porphyrins
A atividade catalítica de clusters trigonais de acetato de rutênio e porfirinas supramoleculares contendo quatro unidades de clusters periféricos ou complexos de bis(bipiridina)rutênio, na oxidação de substratos orgânicos por iodosil-benzeno ou terc-butil-hidroperóxido, é abordada nesta tese. Foram feitos estudos cinéticos para elucidar o mecanismo
Publicado em: 2005