Oxovanadium Iv
Mostrando 1-8 de 8 artigos, teses e dissertações.
-
1. 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
-
2. Copper (II) and oxovanadium complexes with schiff base chiral: preparation, characterization and some catalytic assays / Complexos de cobre(II) e oxovanádio(IV) com bases de Schiff Quirais: preparação, caracterização e alguns ensaios catalíticos
Os complexos de salen são uma classe importante dos compostos de coordenação e são utilizados como catalisadores em uma grande quantidade de reações. Os complexos salen tem mostrado ser catalisadores eficientes e práticos para oxidações assimétricas de vários substratos. Nesta tese, complexos do tipo salcn [salcn = N, N-bis- (salicilideno)-1,2-cic
Publicado em: 2007
-
3. Voltammetric determination of dipyrone using a N,N'-ethylenebis(salicylideneaminato)oxovanadium(IV) modified carbon-paste electrode
A preparação e a caracterização eletroquímica de um eletrodo de pasta de carbono modificado com o complexo N,N´-etilenobis(salicilidenoaminato) de oxovanádio(IV) ([VO(Salen)]), como também o seu comportamento eletrocatalítico na oxidação da dipirona foi investigado. O comportamento eletroquímico do eletrodo modificado e a eletrooxidação da dipi
Journal of the Brazilian Chemical Society. Publicado em: 2004-12
-
4. Chelates complexes of oxovanadium (IV): potentials insulin mimetics. / Quelato complexos de oxovanádio (IV): potenciais mimetizadores de insulina.
Based on studies of another studies that explored the capacity of oxovanadium(IV) ion to mimic insulin, we had the idea to contribute with this line of research. For this, our choice of ligands was trans - 1,2 diamineciclohexane - N,N,N`,N` - tetraacétic (CDTA) and ethilenediaminetetraacétic (EDTA) acids, to synthesize the [VO(CDTA)], Na2[VO(EDTA)] and [(V
Publicado em: 2004
-
5. Synthesis and characterization of oxovanadium (IV) dithiocarbamates with pyridine
We report the synthesis and study of a new series of oxovanadium (IV) dithiocarbamate adducts and derivatives with pyridine and cyclohexyl, di-iso-butyl, di-n-propyl, anilin, morpholin, piperidin and di-iso-propyl amines. The complexes have been characterized by analytical, magnetochemical, IR, visible-UV spectral and thermal studies, and are assigned the fo
Química Nova. Publicado em: 2002-07
-
6. Synthesis and spectroscopic behavior of some oxovanadium(IV) and oxovanadium(V) complexes of 7-iodo-8-hydroxyquinoline-5-sulfonate
O complexo de oxovanadio(IV) [VOL2].5H2O (1) e os complexos de oxovanádio(V) K[VOL2O].4H2O) (2), [VOL2OH] (3) e [VOL2OCH3] (4) (L = sal de potássio do ácido 7-iodo-8-hidroxiquinolina-5-sulfônico) foram preparados e caracterizados. Os espectros no infravermelho dos sólidos foram discutidos e comparados com os de outros compostos semelhantes. Os espectros
Journal of the Brazilian Chemical Society. Publicado em: 2001-04
-
7. Estudo espectroscopico de compostos de oxovanadio (IV)
In this work we studied oxovanadium(IV) compounds, with the VO species coordinated to the following ligands: water, acetylacetone, thiocianate, 8-hydroxyquinoline, 2´,2´-bipyridyl, 1,10-phenantroline, 2,2 -bipyridylamine, oxalic acid and bissalicylaldehydeethylenediimine. Compounds having tne group VO are coordinated with a square pyramid structure. Thus,
Publicado em: 1979
-
8. Catalytic and structural role of the metal ion in dUTP pyrophosphatase
The metal ion dependence of the catalytic activity of recombinant Escherichia coli dUTP pyrophosphatase (dUTPase), an essential enzyme preventing incorporation of uracil into DNA, has been investigated by steady-state kinetic, electron paramagnetic resonance, and electron nuclear double resonance methods. Values of kcat and kcat/Km were 4.5 ± 0.1 s−1 and
The National Academy of Sciences.