A5002561422- Metal complexes synthesis and properties
- Crystallization and Solubility Studies
- X-ray Diffraction in Crystallography
- Metal-Catalyzed Oxygenation Mechanisms
- DNA and Nucleic Acid Chemistry
- Synthesis and Characterization of Heterocyclic Compounds
- Electrochemical Analysis and Applications
- Chemical Reaction Mechanisms
- Magnetism in coordination complexes
- Lanthanide and Transition Metal Complexes
- Organophosphorus compounds synthesis
- Chemical and Physical Properties in Aqueous Solutions
- Inorganic and Organometallic Chemistry
- Molecular Sensors and Ion Detection
- Crystallography and molecular interactions
- Analytical Chemistry and Chromatography
- Analytical Chemistry and Sensors
- Porphyrin and Phthalocyanine Chemistry
- Natural Antidiabetic Agents Studies
- Free Radicals and Antioxidants
- Metalloenzymes and iron-sulfur proteins
- Metal-Organic Frameworks: Synthesis and Applications
- Chemical Synthesis and Characterization
- Analytical chemistry methods development
- melanin and skin pigmentation
Universidade Federal de Santa Catarina
2014-2024
Fundação de Amparo à Pesquisa e Inovação do Estado de Santa Catarina
2015-2016
Division of Chemistry
2015
Polydoro Ernani de São Thiago University Hospital
2010
Universidade Regional de Blumenau
2008
Polytechnic Institute of Castelo Branco
2008
Technical University of Darmstadt
2008
Universidade Estadual Paulista (Unesp)
2006
Universidad de Cádiz
1996-1997
Texas A&M University
1989-1990
Abstract As part of efforts to reduce pressure on the Amazon and other biomes, one approach considered by Brazilian authorities scientists is more intensive use soils interior northeast country, which are generally sandy, with low contents organic matter water holding capacity frequently affected severe droughts. In this work, biochars produced from waste biomasses were tested for improvement these soils. The highest BET (Brunauer-Emmett-Teller) specific surface areas observed all biochars....
The catecholase activity of a series dicopper(II) complexes containing different numbers phenol groups coordinated to the metal centers was studied identify functional as well structural models for type III copper enzymes tyrosinase and catechol oxidase. syntheses characterization [Cu2(H2bbppnol)(μ-OAc)(H2O)2]Cl2·2H2O (1) [Cu2(Hbtppnol)(μ-OAc)](ClO4)2 (2) were previously reported by us (Inorg. Chim. Acta 1998, 281, 111−115; Inorg. Chem. Commun. 1999, 2, 334−337), complex...
In vivo and in vitro treatments were carried out to investigate the effects of kaempferol-3,7-O-(alpha)-dirhamnoside (kaempferitrin), a major flavonoid compound n-butanol fraction from Bauhiniaforficata leaves, on serum glucose levels, as well its antioxidant potential. Oral administration kaempferitrin led significant hypoglycemic effect normal alloxan-induced diabetic rats. rats, blood lowering was observed only with higher dose (200 mg/kg) at 1 h after treatment. However, rats evident all...
Herein, we report the synthesis and characterization, through elemental analysis, electronic spectroscopy, electrochemistry, potentiometric titration, electron paramagnetic resonance, magnetochemistry, of two dinuclear copper(II) complexes, using unsymmetrical ligands N′,N′,N-tris(2-pyridylmethyl)-N-(2-hydroxy-3,5-di-tert-butylbenzyl)-1,3-propanediamin-2-ol (L1) N′,N′-bis(2-pyridylmethyl)-N,N-(2-hydroxybenzyl)(2-hydroxy-3,5-di-tert-butylbenzyl)-1,3-propanediamin-2-ol (L2). The structures...
A ratiometric electrochemical sensor based on a carbon paste electrode modified with quinazoline-engineered ZnFe Prussian blue analogue (PBA-qnz) was developed for the determination of herbicide butralin. The PBA-qnz synthesized by mixing an excess aqueous solution zinc chloride precursor sodium pentacyanido(quinazoline)ferrate. characterized spectroscopic and techniques. stable signal at +0.15 V vs. Ag/AgCl, referring to reduction iron ions, used as internal reference sensor, which...
The new heterodinuclear complex [FeIIIZnII(BPBPMP)(OAc)2]ClO4 (1) with the unsymmetrical N5O2 donor ligand 2-bis[{(2-pyridylmethyl)-aminomethyl}-6-{(2-hydroxybenzyl)(2-pyridylmethyl)}-aminomethyl]-4-methylphenol (H2BPBPMP) has been synthesized and characterized by X-ray crystallography, which reveals that cation an FeIIIZnII(μ-phenoxo)-bis(μ-carboxylato) core. Solution studies of 1 indicate a pH-induced change bridging acetate occurs, formation active [(OH)FeIIIZnII(OH2)] species as highly...
The design and development of suitable biomimetic catalytic systems capable mimicking the functional properties enzymes continues to be a challenge for bioinorganic chemists. In this study, we report on synthesis, X-ray structures, physicochemical characterization novel isostructural [FeIIICoII(BPBPMP)(μ-OAc)2]ClO4 (1) [GaIIICoII(BPBPMP)(μ-OAc)2]ClO4 (2) complexes with unsymmetrical dinucleating ligand H2BPBPMP...
FLOWERS OF Bauhinia forficata (LEGUMINOSAE).From the leaves of kaempferol and four flavonoid glycosides, 3,7rhamnopyranosylquercetin were obtained.From flowers only 7-O-α-L-rhamnopyranosylkaempferol was isolated.
In this work, we measured the metal-binding sites of natural and synthetic dihydroxyindole (DHI) melanins their respective interactions with Fe(III) ions. Besides two acid groups detected for DHI system: catechol (Cat) quinone-imine (QI), acetate were in oligomer by potentiometric titrations. At acidic pH values, complexation melanin was an Fe(OH)(CatH(2)Cat) interaction. With increase pH, three new occurred: dihydroxide diprotonated catechol, Fe(OH)(2)(CatH(2)Cat)(-), monoprotonated...