Transition Metal Complex
Mostrando 1-12 de 59 artigos, teses e dissertações.
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1. New Europium(III)-TTA Complex Containing 2-Pyrrolidone as Coligand to Application as Luminescent Sensor: PbII and Ethanol in Gasoline
This work describes the synthesis and application of an europium(III) complex, [Eu(TTA)3(2-pyr) (H2O)], containing 2-thenoyltrifuoroacetonate (TTA) and 2-pyrrolidone (2-pyr) as ligands, obtained as white solid and soluble in ethanol. In solution, the complex showed red emission, characteristic of the EuIII emission in the solid state (λexc = 375 nm and λem
Journal of the Brazilian Chemical Society. Publicado em: 2022
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2. RAMAN STUDIES OF BIS(PHENYLTERPYRAZINE)IRON(II) AND SUPRAMOLECULAR SPECIES WITH PENTACYANIDOFERRATE(II) IONS
The chemistry and spectroscopy of the iron(II) phenylterpyrazine complex, [Fe(phtpz)2]2+, were investigated in comparison with the analogous phenylterpyridine species, Fe(phtpy)2]2+, and the results indicated a strong electronic delocalization on the Fe(II) terimine chromophore encompassing the lateral pyrazyl groups. The delocalized nature of the molecular
Quím. Nova. Publicado em: 05/12/2019
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3. Synthesis, Characterization and Antimicrobial Activities of Copper, Nickel, Cobalt, Chromium Complexes Derived from (Z)-4-Fluoro-N-(2,7-dimethylhept-6-enylidene) benzenamine
Melonal is a relatively unexplored ingredient in the field of chemistry with excellent sensory properties. The synthesis and characterization of novel transition 3d metal complexes of copper(II), nickel(II), cobalt(II) and chromium(III) involving the Schiff base of melonal were explored to examine their biological activity. Characterization of the complexes
J. Braz. Chem. Soc.. Publicado em: 2017-05
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4. Supramolecular Approach to Decorate Multi-Walled Carbon Nanotubes with Negatively Charged Iron(II) Complexes
Poly(4-vinylpyridine) (P4VP) and P4VP/pentacyanoferrate(II) metallopolymer were used to suspend up to 1 mg mL-1 of multi-walled carbon nanotubes (MWCNT) in ethanol/water mixtures, providing noncolavent decoration of MWCNT with electroactive iron complex. The major interaction between polymer side chains and nanotubes is via π-π stacking, rather than charge
J. Braz. Chem. Soc.. Publicado em: 2017-01
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5. Modelamento matemático do processo de soldagem GMAW
This thesis describes the development and validation of a mathematical model that describes the electrical and operational behavior of GMA welding. Initially it was developed a static model that was able to simulate welding conditions characterized by small current and tension variation usually found with free-flight metal transfer. Afterwards, a dynamic mod
Publicado em: 2010
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6. SÍNTESE E ARRANJOS SUPRAMOLECULARES DE COMPLEXOS BIS(TRIAZENIDO) MACROCÍCLICOS E TRIAZENIDO 1-ÓXIDO COM OS CÁTIONS Cu2+, Ni2+, Cu+, K+. / SYNTHESIS AND SUPRAMOLECULAR ARRANGEMENTS OF BIS(TRIAZENIDE) MACROCYCLIC AND TRIAZENIDE 1-OXIDE COMPLEXES WITH Cu2+, Ni2+, Cu+, K+ CATIONS.
This work elaborates on the determination of crystal and molecular structures of four pro-ligands, emphasizing bis(triazenes), triazene 1-oxide and a new class of bis(triazenes) macrocyclic, and eight complexes involving Cu+, Cu2 +, Ni2 + and K+. Pro-ligands triazenes 1-oxide are relatively small and simple molecules. When they are deprotonated they presen a
Publicado em: 2010
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7. Study of organic light-emitting devices using rare earth and transition metals complexes. / Estudo de dispositivos orgânicos emissores de luz empregando complexos de terras raras e de metais de transição.
This work presents the study of the Rare Earth (RE) and Transition Metals (TM) complexes, as emissive layers of Organic Light-Emitting Devices (OLEDs) designed, built and electro-optically characterized. The thin films were thermally evaporated or spin-coated. This research started with the study of Europium complex changing its central ligand (CL), which sh
Publicado em: 2008
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8. Síntese, estudo cinético e análise microestrutural do sistema cério-níquel obtido pelo método pechini
The cerium oxide has a high potential for use in removing pollutants after combustion, removal of organic matter in waste water and the fuel-cell technology. The nickel oxide is an attractive material due to its excellent chemical stability and their optical properties, electrical and magnetic. In this work, CeO2-NiO- systems on molars reasons 1:1(I), 1:2(II
Publicado em: 2008
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9. PREPARATION FOR SUPPORTING COMPOSITE POLIANYLINE IN MATRIZES OF COPOLYMERS ESTYRENE-DIVINYLBENZENE AND STUDIES OF ADSORPTION BY EXCHANGE IONIC OF COMPLEX ANIONS OF [FeCl4]- AND [CuCl4] 2- / PREPARAÇÃO DE COMPÓSITOS DE POLIANILINA EM MATRIZES DE COPOLÍMEROS ESTIRENO-DIVINILBENZENO E ESTUDOS DE ADSORÇÃO POR TROCA IÔNICA DE ÂNIONS COMPLEXOS DE [FeCl4]- E [CuCl4]2-
In this work, composites of dispersed polyaniline in beads of styrenedivinybenzene copolymer (Pani/Sty-DVB copopolymer) with different porosities were prepared through in situ polymerization. Materials with high surface areas and high porosities were obtained what explain their properties to adsorve transition metals. SD29 and SD84 copolymers were prepared t
Publicado em: 2008
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10. Study of Polychaeta associations in Santos Bay and Adjacent Continental Shelf (SP, Brazil) and their interrelations with physical and geochemical patterns / Estudo das associações de anelídeos Polychaeta da Baía de Santos e Plataforma Continental Adjacente (SP, Brasil) e suas interrelações com parâmetros físicos e geoquímicos estruturadores
The aim of the present work was to verify the spacial and vertical Polychaeta distribution in sediment samples of Santos Bay and adjacent continental shelf by analyzing physicochemical characteristics, granulometric pattern, chemical compounds concentration and metallic elements. Parallely, it looked for determining the organic matter origin by C/N/S content
Publicado em: 2008
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11. Estudo teórico de propriedades químicas de sistemas hetero-macrocíclos que complexam metais de transição divalentes da primeira e segunda filas / Theoretical study of chemistry proprieties of the hetero-macrocycle systems that complex bivalentes transition metals of the first and second-row
Um estudo teórico detalhado das estruturas e energias do ligante 1, 7, 11, 17-tetraoxa-2, 6, 12, 16-trazaocicloocsano ([20]aneN4O4) coordenado com íons metálicos de transição Fe2+, Co2+, Ni2+, Ru2+, Rh2+ e Pd2+ foi realizado em nível de teoria B3LYP/Lanl2DZ. As geometrias dos complexos foram totalmente otimizados em simetria Cs com os íons metálicos
Publicado em: 2008
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12. Complexos carbonílicos de rutênio. De um gás tóxico a uma droga com potencial agente citotóxico
In this work ruthenium carbonyl complexes were synthesized and characterized which allowed an interesting spectroscopic and structural study as well as preliminary in vitro antitumor activity assays. Thus, the interests in the transition metal carbonyls, which carry and liberate CO, are also emerging as a pharmacological tool to mimic the bioactivity of endo
Publicado em: 2007