Tetrakis Complexes
Mostrando 1-12 de 14 artigos, teses e dissertações.
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1. 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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2. 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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3. The Influence of Different Ammonium Cations on the Optical Properties of Tetrakis GdIII and EuIII Complexes
A series of tetrakis-β-diketonate Q+[Ln(β-dik)4]–, where Ln = GdIII or EuIII, Q = ammonium cations and β-dik = tta (2-thenoyltrifluoracetone) or bmdm (1-(4-tert-butylphenyl)-3-(4-methoxyphenyl)-1,3-propanedione) have been synthesized and characterized. The environment surrounding the EuIII ion depends on the lateral groups of the ligand and on the alkyl
J. Braz. Chem. Soc.. Publicado em: 12/08/2019
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4. Investigação fotoluminescente de complexos tetrakis(β-dicetonatos) de terras raras / Photoluminescent investigation of rare earths tetrakis(β-diketonate) complexes
O presente trabalho aborda a síntese, caracterização e estudo fotoluminescente dos complexos tetrakis(β-dicetonatos) de terras raras (M)[TR(acac)4] (M+ = Li+, Na+ e K+; TR3+ = Eu3+, Gd3+, Tb3+ e Tm3+; acac- = acetilacetonato). Os dados de análise elementar evidenciam que os complexos são anidros. A espectroscopia de absorção da região do infrave
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 30/03/2012
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5. ESTUDO DAS PROPRIEDADES ELETROLUMINESCENTES DE NOVOS COMPLEXOS TETRAKIS BETA-DICETONATOS DE EURÓPIO UTILIZADOS EM OLEDS / INVESTIGATION ON ELECTROLUMINESCENT PROPERTIES OF NOVEL TETRAKIS BETA-DIKETONATE COMPLEXES USED IN OLEDS
Rare-earth complexes present extremely sharp line emission making possible to use them in organic light-emitting devices (OLEDs) technology. This dissertation reports the study of three europium tetrakis beta-diketonate complexes: Li[Eu(dbm)(4)].(4)H(2)O, TMPip[Eu(dbm)(4)] and Morf[Eu(dbm)(4)]. UV-Vis absorption, photoluminescence (PL) and cyclic voltammetry
Publicado em: 2010
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6. Sintese e caracterização da nova porfirina, meso-tetrakis (4-butoxi-3-metoxifenil) porfirina, e seus derivados metalados
There has been substantial interest in the properties of substituted meso-tetraarylporphyrins and metallo porphyrins as catalysts for oxidation of hydrocarbons and oxygen detection, among others. This work describes the synthesis of a new porphyrin, TBMPP 27, and its metallo complexes 28 and 29. Herein it was used a readily available reactant as starting mat
Publicado em: 2008
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7. PRODUCTION AND CHARACTERIZATION OF ORGANIC ELECTROLUMINESCENT DEVICES (OLEDS) BASED ON (BETA)-DICEKETONE RARE-EARTH COMPLEXES / PRODUÇÃO E CARACTERIZAÇÃO DE DISPOSITIVOS ORGÂNICOS ELETROLUMINESCENTES (OLEDS) BASEADOS EM COMPLEXOS (BETA)-DICETONATOS DE TERRAS-RARAS
Este trabalho apresenta os resultados de um estudo que envolve a fabricação e a caracterização de dispositivos orgânicos emissores de luz (OLEDs) baseados em complexos ¿-dicetonatos de terras-raras. O estudo se coloca como continuação lógica da linha de pesquisa em dispositivos eletroluminescentes baseados em íons terras-raras, começada alguns ano
Publicado em: 2007
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8. Rutheniumporphyrins: synthesis and application as catalysis in oxidation reactions of ciclohexane, adamantane and Z-ciclooctane. / Rutenioporfirinas: síntese e aplicação como catalisadores de reações de oxidação de ciclo-hexano, adamantano e Z-cicloocteno.
The porphyrin ligands, mesotetraphenyl-21H, 23Hporphyrin, meso-tetrakis(2-bromophenyl)-21H, 23H-porphyrin, meso-tetrakis(4- bromophenyl)-21H, 23H-porphyrin, meso-tetrakis(2-chlorophenyl)-21H, 23Hporphyrin, meso-tetrakis(4-chlorophenyl)-21H, 23H-porphyrin and meso-tetrakis(2,6- dichlorophenyl)-21H, 23H- porphyrins, were synthesized by the condensation reactio
Publicado em: 2006
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9. Synthesis and spectroscopic characterization of tin(II) and tin(IV) complexes containing 2,3,5,6-tetrakis(alpha-pyridyl)pyrazine as a bridging ligand
Neste trabalho foram investigadas as reações entre o ligante heterocíclico nitrogenado 2,3,5,6-tetraquis(alfa-piridil)pirazina, TPP, e seis precursores de estanho, a saber: SnCl2, SnX4 (X = Cl ou Br), SnRCl3 (R = Ph ou Me) e SnPh2Cl2. Os produtos foram caracterizados por microanálise (C, H, N e Sn), espectroscopia no infravermelho (4000-200 cm-1), RMN de
Journal of the Brazilian Chemical Society. Publicado em: 2005-10
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10. SÍNTESE, CARACTERIZAÇÃO E CRISTALOQUÍMICA DE COMPLEXOS DA COBRE(I) E MERCÚRIO(II) COM LIGANTES TRIAZENIDOS / SYNTHESIS, CHARACTERIZATION AND CRYSTALCHEMISTRY OF COPPER(I) AND MERCURY(II) COMPLEXES WITH TRIAZENIDO LIGANDS
The reaction between mercury(II) acetate and 1-(3-nitrophenyl)-3-(2-fluorophenyl)triazene in a tetrahydrofuran/methanol mixture in the presence of 2,2′-bipiridylamine yields the complex [Hg(FC6H4NNNC6H4NO2)2] (1). (1) crystallizes in the triclinic crystal system, space group P(-1), with the crystal data a = 6,8318(10) Å, b = 8,271(3) Å, c = 11,3111(7
Publicado em: 2005
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11. Porfirinas pentacianoferrato e estruturas supramoleculares auto-organizadas / New pentacyanoferrate porphyrin and supramolecular self-assembled structures
The present work describes the synthesis and spectroscopic and electrochemical properties of meso-{tetrakis-(3 pyridylpentacyanoferrate)} porphyrin (PPCF) and its Prussian Blue type materiais, obtained by self-assembly reaction between the new porphyrin and transition metal ions. The new materiais were characterized by Mass, UV -Vis, Infrared, Resonance Rama
Publicado em: 2000
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12. Carbon monoxide binding kinetics in "capped" porphyrin compounds.
The rate constants for CO binding to the five-coordinate ferrous iron complexes of 5,10,15,20-[pyromellitoyl(tetrakis-o-oxyoxyphenyl)]porphyrin and 5,10,15,20-[pyromellitoyl(tetrakis-o-oxypropoxyphenyl)]porphyrin have been measured and compared with the corresponding rate constants for other hemes and hemoproteins. The second-order rate constant is independe