A5075001425- Magnetism in coordination complexes
- Metal complexes synthesis and properties
- Iron Metabolism and Disorders
- Crystallization and Solubility Studies
- Lanthanide and Transition Metal Complexes
- X-ray Diffraction in Crystallography
- Trace Elements in Health
- Advanced biosensing and bioanalysis techniques
- Metal-Organic Frameworks: Synthesis and Applications
- Gold and Silver Nanoparticles Synthesis and Applications
- Nanoparticle-Based Drug Delivery
- Hemoglobinopathies and Related Disorders
- Metal-Catalyzed Oxygenation Mechanisms
- Probiotics and Fermented Foods
- Geomagnetism and Paleomagnetism Studies
- Polyoxometalates: Synthesis and Applications
- Magnetic and Electromagnetic Effects
- Crystal structures of chemical compounds
- Nanocluster Synthesis and Applications
- Bacteriophages and microbial interactions
- Advanced Photocatalysis Techniques
- Supramolecular Self-Assembly in Materials
- Lipid Membrane Structure and Behavior
- Quantum Dots Synthesis And Properties
- Synthesis and Characterization of Heterocyclic Compounds
Universidad de Granada
2016-2025
Instituto de Biotecnología de León
2013-2015
In-Q-Tel
2013
Universitat de València
2003-2008
Universidad de Jaén
2008
Universidad Nacional de La Plata
2008
University of Córdoba
2006
University of Neuchâtel
1998-2003
University of Helsinki
1998-2003
University of Jyväskylä
2003
The dissociation of apoferritin into subunits at pH 2 followed by its re-formation 8.5 in the presence hexacyanoferrate(III) gave rise to a solution containing trapped within and outside it. addition Fe(II) dialyzed resulted appearance characteristic Prussian blue color. UV-vis spectrum this showed broad band centered 710 nm, IR contained broad-medium 2083 cm(-1). Both features are consistent with charge-transfer C[bond]N stretching mode Fe(II)[bond]CN[bond]Fe(III) fragment PB. TEM images...
Few-layer black phosphorous (BP) has emerged as a promising candidate for next-generation nanophotonic and nanoelectronic devices. However, rapid ambient degradation of mechanically exfoliated BP poses challenges in its practical deployment scalable To date, the strategies employed to protect have relied upon preventing exposure atmospheric conditions. Here, an approach that allows this sensitive material remain stable without requiring isolation from environment is reported. The method...
Transmission Electron Microscopy (TEM), X-ray Absorption Near Edge Spectroscopy (XANES), Energy-Loss (EELS), Small-Angle Scattering (SAXS), and SQUID magnetic studies were performed in a batch of horse spleen ferritins from which iron had been gradually removed, yielding samples containing 2200, 1200, 500, 200 atoms. Taken together, findings obtained demonstrate that the ferritin core consists polyphasic structure (ferrihydrite, magnetite, hematite) proportion phases is modified by removal....
Spectrally-selective monitoring of ultraviolet radiations (UVR) is paramount importance across diverse fields, including effective excessive solar exposure. Current UV sensors cannot differentiate between UVA, B, and C, each which has a remarkably different impact on human health. Here we show spectrally selective colorimetric UVR by developing photoelectrochromic ink that consists multi-redox polyoxometalate an e- donor. We combine this with simple components such as filter paper...
The reaction of M(hfac)2 with the tridentate Schiff base H2L (where stands for 1:1 condensation product 2-imidazolecarboxaldehyde β-alanine) leads to complexes [M(HL)(hfac)]n [M = MnII, NiII, and CuII; hfac hexafluoroacetylacetonate anion] (1–3). structures 1 3 have been solved by X-ray crystallographic methods. are very similar consist infinite zig-zag chains, running parallel b axis, in which metal ions bridged sequentially anti-anti carboxylate groups intrachain metal–metal distances...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStructural and magnetic studies of a syn-anti carboxylate-bridged helix-like chain copper(II) complexEnrique Colacio, Jose Manuel Dominguez-Vera, Jean Pierre Costes, Raikko Kivekas, Laurent, Ruiz, Markku SundbergCite this: Inorg. Chem. 1992, 31, 5, 774–778Publication Date (Print):March 1, 1992Publication History Published online1 May 2002Published inissue 1 March...
A new approach for the preparation of carbohydrate-coated magnetic nanoparticles is reported. In a first step, we show that pH-driven assembly-disassembly natural process occurs in apoferritin protein effective encapsulation maghemite different sizes: 4 and 6 nm. second demonstrate presence functional amine groups outer shell allows functionalization with two carbohydrates, N-acetyl-d-glucosamine d-mannose. High-resolution electron microscopy (HREM), high angle annular dark field scanning...
The 2D honeycomb-like layered iron(III)–nickel(II) cyanide-bridged complex [Ni(cyclam)]3[Fe(CN)6]2·nH2O exhibits ferromagnetic intralayer and antiferromagnetic interlayer interactions; above 3 K the magnetic properties are typical of a metamagnet with Hc = 5000 G, whereas below canted structure is formed, leading to long range ordering.
Copper and CuFe Prussian Blue nanoparticles have been prepared by using a CuII-loaded apoferritin as chemically spatially confined environment for their construction.
An electron microscopy study, in combination with modeling and image simulation, of four different reconstituted ferritin samples: recombinant human H L homopolymers, heteropolymers native L-subunit-rich horse spleen H-subunit-rich heart ferritins, points out the existence a correlation between iron core shape protein shell.
The efficiency of maghemite nanoparticles for the treatment anemia was sensibly higher when were incorporated onto probiotic bacterium Lactobacillus fermentum (MNP-bacteria) than administrated as uncoated (MNP). Plasma iron and hemoglobin, intestine expression divalent metal transporter 1 (DMT1) duodenal Cytochrome b (DcytB), well hepatic hormone hepcidin fully restored to healthy levels after administration MNP-bacteria but not MNP. A magnetic study on biodistribution biodegradation showed...
Eggshell formation takes place on the eggshell membrane in an acellular medium, uterine fluid that contains inorganic minerals and precursors of organic matrix. The high degree structure could be due to interaction between calcium carbonate aim this study was demonstrate such by measuring effect vitro collected at various phases shell precipitation kinetics, size, morphology calcite crystals. SDS-PAGE profiles constituents differed different formation. predominant were ovalbumin...
Ni and Co nanoparticles (average diameters 3 3.5 nm) have been prepared within the apoferritin cavity. The protein shell prevents bulk aggregation of metal particles, rendering them water soluble. X-Ray diffraction, transmission electronic microscopy magnetization measurements used for characterizing nanoparticles. magnetic study both confirmed expected superparamagnetic behavior.
Biogenic magnetite is a fascinating example of how nature can generate functional magnetic nanostructures. Inspired by the bacteria, an attempt made to mimic their properties, rather than structures, create living magnets at room temperature. The non‐magnetic probiotic bacteria Lactobacillus fermentum and Bifidobacteria breve are used as bioplatforms densely arrange superparamagnetic nanoparticles on external surfaces, thus obtaining artificial bacteria. Magnetic be produced using maghemite...
We have prepared water-soluble gadolinium oxide nanoparticles that show potential as MRI contrast agents. The particles were built into the apoferritin cavity and an average size of 5 nm. After seven days a loss 5% Gd was detected compared with as-prepared samples; after remained constant stabilized inside apoferritin, indicating capsid acts store, avoiding metal delivery consequent toxicity. NMR longitudinal transverse relaxivities resulted about 10 70 times higher than ones clinically...
One of the latest volcanic features Erta Ale range at Afar Triangle (NE Ethiopia) has created a polyextreme hydrothermal system located Danakil depression on top protovolcano known as dome Dallol. The interaction underlying basaltic magma with evaporitic salts generated unique, high-temperature (108 °C), hypersaline (NaCl supersaturated), hyperacidic (pH values from 0.1 to -1.7), oxygen-free site containing up 150 g/L iron. We find that colorful brine pools and mineral patterns Dallol derive...
The hydrothermal reaction of K(3)[Fe(CN)(6)], CuCl(2), and 2,2'-bipyridine (bipy) resulted in the formation a 2D cyanide-bridged heterobimetallic Fe(II)-Cu(I) complex, [Fe(bipy)(2)(CN)(4)Cu(2)], 1. Working same conditions, but using 2,2'-bipyrimidine (bpym) instead bipy methanol as solvent, we obtained homometallic Cu(I) complex [Cu(2)(CN)(2)(bpym)](2), 2. structure 1 consists layers, constructed from alternately fused 6 (Fe(2)Cu(4)) 10 (Fe(2)Cu(8)) metal-membered centrosymmetric rings,...