Metallic Complexes
Mostrando 1-12 de 51 artigos, teses e dissertações.
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1. WSOC and Its Relationship with BC, Levoglucosan and Transition Metals in the PM2.5 of an Urban Area in the Amazon
Water-soluble organic carbon (WSOC) makes up a large mass fraction of the organic carbon in the aerosol and can influence important cloud processes in the atmosphere. The capacity of WSOC to form metallic complexes with transition metals is well known; however, its influence on the aerosol of urban areas in the Amazon region is not very well known. In this s
Journal of the Brazilian Chemical Society. Publicado em: 2022
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2. RECENTES APLICAÇÕES DO ORGANOFOTOCATALISADOR 1,2,3,5-TETRAQUIS(CARBAZOL-9-IL)-4,6-DICIANOBENZENO EM TRANSFORMAÇÕES QUÍMICAS
Ruthenium and iridium polypyridine complexes are among the most employed photocatalysts described in literature. The broad applicability is due to the redox potentials and long half-life times of the excited state which these molecules presented. The pursuit for metal-free alternatives has been intensified in the last few years, therefore, many organic fluor
Quím. Nova. Publicado em: 2021-03
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3. Shortcomings in the training program of medical residency during the COVID-19 pandemic in Brazil. How will they be repaired?
Ruthenium and iridium polypyridine complexes are among the most employed photocatalysts described in literature. The broad applicability is due to the redox potentials and long half-life times of the excited state which these molecules presented. The pursuit for metal-free alternatives has been intensified in the last few years, therefore, many organic fluor
Rev. Bras. Ginecol. Obstet.. Publicado em: 2021-03
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4. Study of the Reactivity of complex ions cis-[Ru (bpy)2(L) (NO)]n+ where L = imidazole, 1-metilimidazole, thiourea and sulfite / Estudo da Reatividade dos Ãons complexos cis-[Ru(bpy)2(L)(NO)]n+ onde L=imidazol, 1-metilimidazol, tioureia e sulfito
We carried out studies of chemical reactivity, electrochemistry and photochemistry of complexes cis-[Ru(bpy)2(L)(NO)](PF6)n, where L = imidazole, 1-methylimidazole, thiourea and sulfite. Were chosen, therefore, two ligands being donors and two with ligands that act as -recipient and the results indicated that the nature and strength of these
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 28/01/2011
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5. Solos de tres areas de restinga. II. Dinamica de substancias humicas, ferro e aluminio.
Substancias humicas foram fracionadas e feitas extracoes de Fe e Al com ditionito (Fe d e Al d), oxalato (Fe o e Al o) e pirofosfato de sodio (Fe p e Al p) com intuito de estudar os aspectos de formacao de solos de tres areas de restinga no litoral fluminense sob diferentes coberturas vegetais. No ambiente de forte hidromorfismo da Lagoa de Robalo, acidos hu
Pesquisa Agropecuaria Brasileira. Publicado em: 2011
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6. Estudo sobre o hidróxido de potássio no processo de produção industrial de poliol poliéter
Metallic ions may interact with polyether polyols giving macromolecular complexes. From this approach, it was investigated the interaction of cationic potassium with polyether polyols by means of several techniques in order to proof complexation as well as its ocurrence. The industrial synthesis of polyether polyols does not result in a pure product but give
Publicado em: 2010
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7. SÍNTESE E CARACTERIZAÇÃO DE COMPLEXOS DE COBRE (II) E ZINCO (II) COM DIPEPTÍDEOS DE INTERESSE BIOLÓGICO / SYTHESIS AND CHARACTERIZATION OF COPPER (II) AND ZINC (II) COMPLEXES WITH DIPEPTIDES OF BIOLOGICAL INTEREST
This work describes the synthesis and characterization of copper (II) and zinc (II) complexes, with dipeptides in solid state. The dipeptides involved were: glycyl-glycine, glycyl-valine, methionyl-methionine, methionyl-glycine and cysteinyl-glycine, whose aminoacids take part in some proteins involved in neurodegeneration processes, more specifically in Alz
Publicado em: 2010
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8. 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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9. Bimetallic Pt-Ni catalysts supported on usy zeolite for n-hexane isomerization
Isomerization of linear alkanes has had considerable importance for the refining industry because the isomers formed in this reaction have high octane number. Most works reported in the literature studied the use of bifunctional catalysts, i.e., ones that have acid sites and metallic sites. In this study, bifunctional monometallic (Ni or Pt) and bimetallic c
Brazilian Journal of Chemical Engineering. Publicado em: 2009-06
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10. SIMULATION OF THE VERTICAL TRANSPORT OF ZINC, LEAD AND COPPER IN CONTAMINATED SOILS / SIMULAÇÃO DO TRANSPORTE VERTICAL DE ZINCO, CHUMBO E COBRE EM SOLOS CONTAMINADOS
The environmental contamination by metallic trace elements is a problem that is getting worse around the world due to the growth and the technologic development of the humanity. Among the main sources of this kind of contamination are the atmospheric deposition of particles in soils located around industrial complexes and the prolonged and concentrated appli
Publicado em: 2009
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11. New catalysts based on oxovanadium (IV) and cucurbit[6]uril. / Novos catalisadores à base de oxovanádio (IV) e Cucurbit[6]urila
Cucurbiturils are versatile molecules used in several branches of chemistry. These molecular cages form a family of homologues from the condensation of glycoluril and formaldehyde in acidic medium. Their applications range from catalysis, photochemistry, organic and inorganic synthesis, materials and supramolecular chemistry. Particularly cucurbit[6]uril, or
Publicado em: 2009
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12. Estudo da interação do vanádio (V) com ácidos [beta]-alaninoidroxâmico, glicinoidroxâmico e [alfa]-alaninoidroxâmico em solução aquosa $h [manuscrito] : $b uma abordagem a partir da DFT
The discovery of the potential insulin-mimetic properties of vanadium compounds has stimulated research about the clinical use of these compounds. The effects of different organic groups in the geometry, electronic structure and chemical properties of the vanadium coordination compounds are of fundamental importance to understand the chemical reactivity and
Publicado em: 2009