Complexes Of Lanthanide
Mostrando 1-12 de 29 artigos, teses e dissertações.
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1. Photodegradation of a polypropylene filled with lanthanide complexes
This research aims at studying the photodegradation of a polypropylene formulation filled with lanthanide complexes. These complexes can be used as tracers for the identification of polymer materials in order to facilitate an high speed automatic sorting of plastic wastes for an economically efficient recycling. By paying attention to the evolution of carbon
Polímeros. Publicado em: 04/12/2015
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2. High shear dispersion of tracers in polyolefins for improving their detection
Abstract An efficient recycling of end-of-life products is of crucial interest from an economical and ecological point of view. However, the near infrared spectroscopy often used for the optic sorting processes is limited because of the absorption of carbon black present in black plastics and as it only sorts as a function of chemical formulas. The tracing t
Polímeros. Publicado em: 2015-10
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3. Fases sólidas luminescentes contendo íons lantanídeos : uma proposta para determinação de ácido siálico.
The organofunctionalized silica was used as the solid support in the study of photophysical properties of lanthanides, in particular the Eu (III) ions, which functions as structural probe has been thoroughly discussed seeking new technological applications. In this study, were synthesized two novel organofunctionalized silica matrices and new lanthanide comp
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 27/02/2012
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4. Synthesi and photoluminescent properties of bis-diketonate complexes of trivalent lanthanide ions with phosphine oxide ligands / Síntese e propriedades fotoluminescentes de complexos bis-dicetonatos de íons lantanídeos trivalentes com ligantes fosfinóxidos
Este trabalho relata a síntese, caracterização e a investigação das propriedades fotoluminescentes de complexos β-dicetonatos (TTA=2-tenoiltrifluoroacetonato e DBM= dibenzoilmetanato) de íons lantanídeos trivalentes (Ln3+= Gd3+, Eu3+ e Tb3+) com diferentes ligantes fosfinóxidos (TPPO= trifenilfosfinóxido e HMPA= hexametilfosforamida). Os dados
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 03/06/2011
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5. Síntese, Caracterização Estrutural e Propriedades Luminescentes de Complexos de Lantanídeos (III) com Hidrazonas e Semicarbazonas derivadas da 2,6-Diformilpiridina e com Triazenos 1-óxidos. / Synthesis, Structural Characterization and Luminescent Properties of Complexes of Lanthanides (III) with Hydrazones and Semicarbazones derived from 2,6-diformylpyridine and Triazenes 1-oxides.
Lanthanide complexes with ligands containing oxygen and nitrogen as donor atoms have been investigated in this study aiming to explore the coordinative behavior of metals with high coordination numbers, as well as a study of luminescence properties of new complexes. The chosen ligands were hydrazones and semicarbazones derived from 2,6-diformylpyridine and t
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 201103
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6. Estudos das propriedades ópticas dos complexos európio tetraciclinas e suas aplicações na detecção de lipoproteínas / Studies of optical properties of complexes europium tetracycline and its applications in detection of lipoproteins
This work presents the optical properties of europium complexes - Tetracyclines (EuTcs) in the presence of LDL and oxidized LDL with potential applications in clinical analysis. Four elements were chosen from the Tetracyclines family: Tetracycline (Tc), Chlortetracycline (CTc), Metatetraciclina (MTc) and Oxytetracycline (OTc) to be part of complexes with eur
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 26/07/2010
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7. DESENVOLVIMENTO DE UM NOVO MARCADOR LUMINESCENTE PARAMICROCISTINA-LR: um estudo teórico. / DEVELOPMENT OF A NEW luminescent PARAMICROCISTINA-LR: a theoretical study.
In this work we describe a theoretical study of lanthanide complexes with macrocyclic ligands. Spectroscopic properties of the cryptate [EuÌ(bipy)2py(CO2Et)2]3+.2H2O were investigated with semiempirical methodologies such as Sparkle, INDO/S-CIS, Judd- Ofelt model as well as Maltas models implemented in LUMPAC (Luminescence Package). This computational packa
Publicado em: 2010
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8. SPECTROSCOPIC CHARACTERIZATION OF HYPOCRELLIN B: LANTHANIDE COMPLEXES FOR USE IN PHOTODYNAMIC THERAPY / Caracterização espectroscópica de complexos hipocrelina B: lantanídeos para uso em terapia fotodinâmica
A study about the optical properties of the chromophore hypocrellin B (HB) and of its complexes with lanthanum (La3+), europium (Eu3+) and terbium (Tb3+) ions in ethanol solutions was realized. This pigment is a potential second generation photosensitizer due to its great properties, as high in vivo metabolism and mainly high singlet oxygen generation quantu
Publicado em: 2009
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9. Synthesis and magnetic studies of copper(II)-lanthanide(III) 5-bromosalicylideneglycylglycine
The physico-chemical properties of the new 3d-4f heteronuclear complexes with general formula LnCu3(C11H8N2 O4Br)3·13H2O (where Ln = Pr, Eu, Gd, Tb, Er, Yb and H3(C11H8N2 O4Br) - 5-bromosalicylideneglycylglycine) were studied. The compounds were characterized by elemental, spectral and thermal analyses and magnetic measurements. The formation of Schiff base
Eclética Química. Publicado em: 2009
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10. Estudo teórico das espécies heterobimetálicas laGa, ceGa, euGa e ybGa em fase gasosa .
The current dissertation deals with the study of electronic structure elucidation of gas phase neutral heterobimetallic species LnGa(Ln=La, Ce, Eu, Yb) using relativistic effective core potentials. Lanthanides are of a great interest in different areas of chemistry: coordination chemistry, organometallic chemistry and catalysis. An expectation is that Ln-Ga
Publicado em: 2009
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11. AvaliaÃÃo espectroscÃpica da substituiÃÃo sistemÃtica de molÃculas de Ãgua coordenadas por ligantes β-dicetonas em complexos com Ãons lantanÃdeos
In this work, lanthanide complexes with β-diketones (2,4-pentanedione and trifluoroacetylacetone) and β-keto esters (etil 4,4,4,-trifluoro-2,4- pentanedione) ligands have been synthesized. The complexes showed general formulas: [Ln(acac)(H2O)6]Cl2, [Ln(acac)2(H2O)4]Cl, [Ln(tfa)(H2O)6]Cl2, [Ln(tfa)2(H2O)4]Cl e [Ln(eta)2(H2O)4]Cl. The compounds were
Publicado em: 2008
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12. Estudos conformacionais em compostos contendo íons lantanídeos
Lanthanide macrocyclic complexes, especially containing Gd(III) ions, are largely used as contrast agents in the medical diagnostic technique named Magnetic Resonance Imaging (MRI). Theoretical investigation of these compounds by molecular modeling methods is an emerging research area today. In this work we have performed a conformational study of the follow
Publicado em: 2008