A5027616030- Metal complexes synthesis and properties
- Electron Spin Resonance Studies
- Magnetism in coordination complexes
- Crystallization and Solubility Studies
- X-ray Diffraction in Crystallography
- Porphyrin and Phthalocyanine Chemistry
- Metal-Catalyzed Oxygenation Mechanisms
- Lanthanide and Transition Metal Complexes
- Hemoglobin structure and function
- Electrochemical Analysis and Applications
- Photosynthetic Processes and Mechanisms
- Conducting polymers and applications
- Solid-state spectroscopy and crystallography
- Organometallic Complex Synthesis and Catalysis
- Spectroscopy and Quantum Chemical Studies
- Photochemistry and Electron Transfer Studies
- Electrochemical sensors and biosensors
- Advanced Photocatalysis Techniques
- Photodynamic Therapy Research Studies
- Inorganic and Organometallic Chemistry
- Lipid Membrane Structure and Behavior
- Protein Interaction Studies and Fluorescence Analysis
- Crystallography and molecular interactions
- Free Radicals and Antioxidants
- Phenothiazines and Benzothiazines Synthesis and Activities
Universidade de São Paulo
2016-2025
Universidade Federal de São Carlos
2014-2025
Hospital Universitário da Universidade de São Paulo
2000-2021
Institute of Physics
2018
Instituto de Física del Litoral
2017
Consejo Nacional de Investigaciones Científicas y Técnicas
1999-2017
National University of the Littoral
1999-2017
Agrupamento de Escolas Nuno Álvares
2016
Universidade Federal do ABC
2011-2012
Universidade de Mogi das Cruzes
2004-2006
A spin-probe method is described that can detect changes in the relative aggregation numbers SDS micelles with a precision of about one molecule. The based on fact 14N hyperfine coupling constant sensitive to average fraction volume occupied by water region nitroxide moiety located near micelle surface. Defining A0(NA) be at an number NA, we find = A0(0) + (∂A0/∂NA)NA, where NA controlled varying either or NaCl concentrations. For spin probe 5-doxylstearic acid ester(5DSE), combination...
Osteosarcoma cancers are becoming more common in children and young adults, existing treatments have low efficacy a very high mortality rate, making it pressing to search for new chemotherapies with selectivity index. Copper complexes shown promise the treatment of osteosarcoma. Here, we report synthesis, characterization, anticancer activity [Cu(N–N–Fur)(NO3)(H2O)] complex where N–N–Fur is (E)-N′-(2-hydroxy-3-methoxybenzylidene)furan-2-carbohydrazide. The was characterized via X-ray...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis, crystal structure, electrochemical, and spectroelectrochemical properties of the new manganese(III) complex [MnIII(BBPEN)][PF6] [H2BBPEN = N,N'-bis(2-hydroxybenzyl)-N,N'-bis(2-methylpyridyl)ethylenediamine]Ademir Neves, Sueli M. D. Erthal, Ivo Vencato, Augusto S. Ceccato, Yvonne P. Mascarenhas, Otaciro R. Nascimento, Manfredo Horner, Alzir A. BatistaCite this: Inorg. Chem. 1992, 31, 23, 4749–4755Publication Date (Print):November 1,...
[Cu(dmp)<sub>2</sub>(CH<sub>3</sub>CN)]<sup>2+</sup> can be reduced in acetonitrile containing water due to steric constraints of the ligands. Hydroxyl radicals are produced from oxidation. We take advantage this reaction evaluate anticancer activity complex.
Recently cytochrome <i>c</i> has been mentioned as an important mediator in the events of cellular oxidative stress and apoptosis. To investigate influence charged interfaces on conformation <i>c</i>, CD magnetic circular dichroic behavior ferric ferrous homogeneous medium phosphatidylcholine/phosphatidylethanolamine/cardiolipin dicetylphosphate liposomes was studied 300–600 200–320 nm wavelength region. EPR spectra demonstrate that association with membranes promotes alterations crystal...
This work compares the effect of photogenerated singlet oxygen (O(2)((1)Delta(g))) (type II mechanism) and free radicals I on cytochrome c structure reactivity. Both reactive species were obtained by photoexcitation methylene blue (MB(+)) in monomer dimer forms, respectively. The form is predominant at low dye concentrations (up to 8 microm) or presence an excess SDS micelles, while dimers are 0.7 mm SDS. Over a pH range which native form, O(2) ((1)Delta(g)) induced Soret band shift (from...
We report electron-paramagnetic resonance (EPR) studies at $\ensuremath{\sim}9.5\text{ }\text{GHz}$ ($X$ band) and $\ensuremath{\sim}34\text{ ($Q$ of powder single-crystal samples the compound ${\text{Cu}}_{2}{[\text{TzTs}]}_{4}$ [$N$-thiazol-2-yl-toluenesulfonamidatecopper(II)], ${\text{C}}_{40}{\text{H}}_{36}{\text{Cu}}_{2}{\text{N}}_{8}{\text{O}}_{8}{\text{S}}_{8}$, having copper(II) ions in dinuclear units. Our data allow determining an antiferromagnetic interaction...
ABSTRACT The new compound (1S,4S)‐ N ‐(4‐iodophenyl)bicyclo[2.2.1]hept‐5‐en‐2‐carboxamide ( NBE–amide‐I ) was synthesized using 4‐iodoaniline and 5‐norbornene‐2‐carboxylic acid. then used in an oxidative addition reaction with [Ni(PPh 3 4 ] to obtain the complex [NiI(NBE–amide)(PPh 2 Ni–NBE ). complexes [Ni(NBE–amide)(PPh )(Schiff–cyclohexane)] (mono‐Schiff–Ni) [{RuCl (η 6 ‐ p ‐cymene)}μ{(Schiff‐pip)Ni(aryl–NBE)(PPh )}] Ru–Ni–NBE were via a one‐pot Ni–NBE, salicylaldehyde,...
This study explores the dynamics of charge separation (CS) and recombination in photoinduced electron transfer [Ru(phen)2(pNDIp)]2+ dyad, focusing on thermal equilibrium between rapid slower charge-separated state (CSS). The pNDIp component is a naphthalene diimide linked to one phen ligands, providing nearly unrestricted orthogonal freedom {[Ru(phen)3]2+} {pNDIp} units. investigation employs steady-state time-resolved spectroscopic techniques, electrochemical methods, DFT/TD-DFT...
The reaction of the dinuclear [RuCl2(dppb)]2(μ-dppb) (dppb = 1,4-bis(diphenylphosphino)butane) with Cl2 in MeOH for ∼30 min at room temperature gives bright-red solid mer-RuCl3(dppb)(H2O) (1); treatment ∼10 affords red-brown, mixed valence complex [RuCl(dppb)]2(μ-Cl)3 (2). Controlled bulk coulometric reduction 50% content a CH2Cl2 solution 1 also produces 2, formed by "RuCl2(dppb)" produced situ during electrolysis. Complexes and 2 were characterized spectroscopic techniques [including...
A mixed-valence complex, [FeIIIFeIIL1(μ-OAc)2]BF4·H2O, where the ligand H2L1 = 2-{[[3-[((bis(pyridin-2-ylmethyl)amino)methyl)-2-hydroxy-5-methylbenzyl](pyridin-2-ylmethyl)amino]methyl]phenol}, has been studied with a range of techniques, and, possible, its properties have compared to those corresponding enzyme system purple acid phosphatase. The FeIIIFeII and FeIII2 oxidized species were spectroelectrochemically. temperature-dependent population S 3/2 spin states heterovalent system,...