Transition Metal Complex
Mostrando 13-24 de 59 artigos, teses e dissertações.
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13. Preparação de redes modificadas de poli(dimetilsiloxano) com ion piridinio ou etilenodiamina : estudo da adsorção de ions metalicos em etanolico / Preparation of modified poly(dimethylsiloxane) network with pyridine ion or ethylenediamine : study of metalic ion adsoption from ethanol solution
In this work elastomeric polymeric networks based on poly(dimethilsiloxane) PDMS, modified with pyridine ion or ethylenediamine, were prepared. These materials were characterized by infrared spectrometry, thermogravimetric analysis, differential scanning calorimetry and nuclear magnetic resonance (NMR) of Si and C. The results showed that both materials pres
Publicado em: 2007
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14. Estudo de complexos de ferro-cyclam com ligantes carboxilados e polinitrilados / Study of complexes of iron-cyclam with carboxylate ligants and polinitrilate
The main objective of this work is to contribute with the chemistry of the system Fe-Cyclam through the synthesis and characterization of complexes with carboxylate ligants, acetate and oxalate, and polinitrilate ligands, 7,7,8,8-tetracyanoquinodimethane (TCNQ) and tetracyanoethylene (TCNE). The infrared spectra of the cis-[Fe(cyclam)ox]PF6 complex allowed t
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 26/06/2006
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15. SÍNTESE, PROPRIEDADES E INVESTIGAÇÃO ESTRUTURAL DE 1,3-DIARILTRIAZENOS E COMPLEXOS COM Ni(II), Pd(II), Pt(II) e Hg(II) / SYNTHESIS, PROPERTIES AND STRUCTURAL INVESTIGATION OF 1,3-DIARILTRIAZENES AND COMPLEXES WITH Ni(II), Pd(II), Pt(II) e Hg(II)
Although transition metal complexes with nitrogen coordination spheres involving monocatenated 1,3-diarylsubstituted triazenido ligands (ArNNNAr)−, have been investigated in the last decades, the structure of such compounds continues to attract the interest investigatiors. The synthesis of new triazenes derive 1-3-diariltriazenes and reaction with tran
Publicado em: 2006
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16. Magnetic, thermal and spectral behaviour of 3-chloro-2-nitrobenzoates of Co(II), Ni(II), and Cu(II)
Physico-chemical properties of 3-chloro-2-nitrobenzoates of Co(II), Ni(II) and Cu(II) were synthesized and studied. The complexes were obtained as mono- and dihydrates with a metal ion to ligand ratio of 1 : 2. All analysed 3-chloro-2-nitrobenzoates are polycrystalline compounds with colours depending on the central ions: pink for Co(II), green for Ni(II) an
Eclética Química. Publicado em: 2006
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17. Desenvolvimento de dispositivo fotÃnico para monitoramento de metais poluentes em recursos hÃdricos
In this work they were studied some properties of a polymeric of the class of the superabsorbents (SAP), that is used broadly in the industry of products of personal care. This polymeric one that is a derived of the acrylic acid formed by reticulation of nets crosslink, an excellent agent complexante was shown, for presenting in its structure groups amids an
Publicado em: 2004
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18. Sintese e reações de alguns compostos ciclicos de tres membros com complexos de metais de transição
With the aim of studying the reactivity of some cyclopropane derivatives with respect to certain transition metal complexes of the d group, the a-chlorine-a-(cyclopropiliden)-methyl acetates 1a and 1b, the alquinilcyclopropanes 2a-i and the 3-cyclopropil-2H-azirine 3a were synthesized. Reactions of these cyclopropanes with organometalic complexes of the nick
Publicado em: 2004
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19. Preparação e caracterização do complexo cobaloxima e sua utilização na construção de um eletrodo modificado: um experimento eletroquímico no curso de graduação
The present experiment describes the preparation, characterization of n-butyl(pyridil)cobaloxime complex and its electrochemical property. The infrared and uv-visible absorption spectra were used to characterize the complex obtained. The infrared spectrum of the compound showed characteristics bands that indicated the formation of the Co-C chemical bond form
Química Nova. Publicado em: 2003-12
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20. Eletronic charge density at high resolution x-rays diffraction and topological anlysis using the multipole model in single crystals compounds of biological interest / Densidade eletrônica por difração de raios-x à alta resolução e análise topológica com modelo multipolar em compostos monocristalinos de interesse biológico
The bonding properties of the transition metal complex Cu(I1)-L-alanyl-L-valine and the Taurine compound have been determined by high resolution x-ray diffraction. The charge density analysis is performed using the Hansen-Coppens multipole model for both, the topological study of the electron density p(f) and the orbital populations analysis of the transitio
Publicado em: 2003
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21. Influencia de parametros termicos de solidificação na transição colunar/equiaxial
The macroestructure of cast ingots can be characterized by either a completely columnar structure or an equiaxed structure, depending on alloy composition and solidification conditions. A more complex structure, typical of solidification in molds of high heat diffusivity, like chill and cooled molds, both structural forms. This mixed mode of solidification o
Publicado em: 2002
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22. Indução de danos Oxidativos em celulas de mamifero por isoproterenol e cobre
Isoproterenol (IP) is a synthetic catecholamine of great pharmacological interest, as it is the most potent B-adrenergic known agonist. Recent works revealed the involvement of IP oxidation reactions in cardiotoxicity mechanisms. Copper is an essential microelement which has a fundamental role in living organisms metabolism. In high concentration copper is e
Publicado em: 2001
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23. Participação do oxido nitrico no desenvolvimento da encefalomielite alergica experimental em ratos
Nitric oxide (NO) is a free radical endogenously synthetised by oxidation of one of the guanidinum nitrogen atoms of the aminoacid L-arginine by molecular oxygen. This biosynthesis is catalised by a family of enzimes generically known as nitric oxide synthases (NOS), which can be inhibited by structural analogs of L-arginine having substituent groups at the
Publicado em: 2001
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24. 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