Organic Metallic Complexes
Mostrando 1-12 de 14 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. 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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5. 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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6. 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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7. 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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8. Structural study of complexes of copper (II) as models metallic sites of enzymes with oxidative / Estudo estrutural de complexos de cobre (II) como modelos de sítios metálicos de enzimas com atividade oxidativa
We present the structural study, by x-rays diffraction, of two forms on the crystalline and molecular structures of the metal-organic single-crystal compounds Dicloro[N- benzoyl-N-(4-methylphenyl)-N-(2-pyridinyl)-guanidine)]copper(II). Such compound is known for the phenol oxidative catalictic bioactivity. The compound is a copper(II)-guanidine de- rivative
Publicado em: 2009
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9. 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
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10. Structural study of complexes of copper (II) as models metallic sites of enzymes with oxidative / Estudo estrutural de complexos de cobre (II) como modelos de sítios metálicos de enzimas com atividade oxidativa
Apresentamos um estudo estrutural, por difracao de raios X, das estruturas cris- talinas e moleculares de um composto metalorganico no estado monocristalino Dicloro [N- benzoil-N-(4-metilfenil)-N-(2-piridinil)-guanidina)] Cobre(II). O qual apresenta atividade biologica de catalise do processo de oxidacao de fenois. O complexo e de cobre(II) com um derivado d
Publicado em: 2009
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11. Structural study of complexes of copper (II) as models metallic sites of enzymes with oxidative / Estudo estrutural de complexos de cobre (II) como modelos de sítios metálicos de enzimas com atividade oxidativa
Apresentamos um estudo estrutural, por difracao de raios X, das estruturas cris- talinas e moleculares de um composto metalorganico no estado monocristalino Dicloro [N- benzoil-N-(4-metilfenil)-N-(2-piridinil)-guanidina)] Cobre(II). O qual apresenta atividade biologica de catalise do processo de oxidacao de fenois. O complexo e de cobre(II) com um derivado d
Publicado em: 2009
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12. Determinação de Co, Cu, Mn, Mo,Na, Sn e Ti em niobio e tantalo, por absorção da matriz com diatipirilmetano
Determination of metallic impurities in niobium and tantalum by flame atomic absorption spectrophotometry (or atomic emission), without matrix separation is not possible due to interferences. This work describes the procedure to effect this separation: niobium or tantalum was extracted in 1,2- dichloroethane by means of their complexes with diantipyrylmethan
Publicado em: 1987