A5032357919- Crystallization and Solubility Studies
- X-ray Diffraction in Crystallography
- Rare-earth and actinide compounds
- Magnetic and transport properties of perovskites and related materials
- Magnetic Properties of Alloys
- Magnetism in coordination complexes
- Advanced Condensed Matter Physics
- Advancements in Solid Oxide Fuel Cells
- Iron-based superconductors research
- Electronic and Structural Properties of Oxides
- Organic and Molecular Conductors Research
- Metal-Organic Frameworks: Synthesis and Applications
- Lanthanide and Transition Metal Complexes
- Geochemistry and Elemental Analysis
- Multiferroics and related materials
- Inorganic Chemistry and Materials
- Geological and Geochemical Analysis
- Magnetic Properties and Synthesis of Ferrites
- Nuclear Materials and Properties
- Nuclear materials and radiation effects
- Iron oxide chemistry and applications
- Magnetic properties of thin films
- Thermodynamic and Structural Properties of Metals and Alloys
- Ferroelectric and Piezoelectric Materials
- Electron Spin Resonance Studies
University of Lisbon
2016-2025
Instituto Superior Técnico
2012-2023
Instituto Politécnico de Lisboa
2012-2023
Departamento de Ciência e Tecnologia
2021-2023
TARH (Portugal)
2005-2018
Parc Científic de la Universitat de València
2017
Czech Academy of Sciences
2015
Instituto de Engenharia de Sistemas e Computadores Investigação e Desenvolvimento
2012-2014
Université de Rennes
2002-2013
Centre National de la Recherche Scientifique
2002-2013
Abstract Prussian blue (PB) represents a simple, economical, and eco‐friendly system as cathode material for sodium‐ion batteries (SIBs). However, structural problems usually worsen its experimental performance thus motivating the search alternative synthetic strategies formation of composites that compensate these deficiencies. Herein, straightforward approach preparation PB/MoS 2 ‐based nanocomposites is presented. MoS provides 2D active support homogeneous nucleation porous PB...
CO2 is selectively hydrogenated to HCO2H or hydrocarbons (HCs) by RuFe nanoparticles (NPs) in ionic liquids (ILs) under mild reaction conditions. The generation of occurs ILs containing basic anions, whereas heavy HCs (up C21 at 150 °C) are formed the presence nonbasic anions. Remarkably, high values TONs (400) and a TOF value 23.52 h–1 for formic acid with molar ratio 2.03 per BMI·OAc IL were obtained. Moreover, these NPs exhibited outstanding abilities formation long-chain efficient...
The assembly of hexacyanoferrate(III) anions and nickel(II) bis-diamino complexes the chiral ligand trans-cyclohexane-1,2-diamine (trans-chxn) yields cyanide-bridged two-dimensional ferromagnets general formula [Ni(trans-chxn)2]3[Fe(CN)6]2·2H2O. Their crystal structure is built from bimetallic planes separated by bulky chxn ligands, giving rise to a large interlayer distance (d = 11.7 Å). These materials order ferromagnetically at Curie temperature TC 14 K. AC susceptibility measurements...
Increasing the difference of Ln3+ and A2+ cation radii in perovskite-type Ln0.5A0.5FeO3−δ (Ln = La, Pr, Nd, Sm; A Sr, Ba) results higher oxygen deficiency lower oxygen-ionic p-type electronic conductivities, determined using permeation total conductivity measurements at 973−1223 K. The relationships between anion transport A-site size mismatch remain essentially similar air under reducing conditions when most iron cations become trivalent, thus confirming critical influence oxygen-vacancy...
Reaction of the polysulfonated triazole ligand L = 4-(1,2,4-triazol-4-yl)ethanedisulfonate) with iron(II) salts in water yields trimeric species [Fe3(μ-L)6(H2O)6](6-). This polyanion, as dimethylammonium salt, shows a thermally induced spin transition above room temperature for central Fe position trimer large hysteresis cycle (>85 K) and remarkably slow dynamics. allows easy quenching metastable high-spin (HS) state via gradual cooling (5 K min(-1)). Once it is trapped, HS remains...
The mixed-valence FeIIFeIII 2D coordination polymer formulated as [TAG][FeIIFeIII(ClCNAn)3]·(solvate) 1 (TAG = tris(amino)-guanidinium, ClCNAn2– chlorocyanoanilate dianionic ligand) crystallized in the polar trigonal space group P3. In solid-state structure, determined both at 150 and 10 K, anionic honeycomb layers [FeIIFeIII(ClCNAn)3]− establish ab plane, with an intralayer metal–metal distance of 7.860 Å, alternating cationic TAG. similar Fe–O distances suggest electron delocalization...
The oxygen ionic conductivity of apatite-type and increases with increasing content. ion transference numbers, determined by faradaic efficiency measurements at 973-1223 K in air, are close to unity for vary the range 0.96-0.99 other compositions. Doping iron results an fraction, which was evaluated Mössbauer spectroscopy correlates partial p-type electronic conductivities, whereas La-stoichiometric apatites stabilize state. Among studied materials, highest transport is observed where...
The syntheses, structures and magnetic properties of the compounds formula [Fe(III)(sal(2)-trien)][Mn(II)Cr(III)(ox)(3)].CH(2)Cl(2) (1; H(2)sal(2)-trien=N,N'-disalicylidenetriethylenetetramine, ox=oxalate), [Fe(III)(sal(2)-trien)][Mn(II)Cr(III)(ox)(3)].CH(3)OH (2), [In(III)(sal(2)-trien)][Mn(II)Cr(III)(ox)(3)].0.25H(2)O.0.25CH(3)OH.0.25CH(3)CN (3), [In(III)(sal(2)-trien)][Mn(II)Cr(III)(ox)(3)].CH(3)NO(2).0.5H(2)O (4) are reported. structure 1 presents a 2D honeycomb anionic layer formed by...
We report the synthesis of iron(III) complex hexadentate Schiff base ligand nsal2trien obtained from condensation triethylenetetramine and 2 equiv. 2-hydroxy-1-naphthaldehyde. The study salt [Fe(nsal2trien)]SCN (1) by magnetic susceptibility measurements Mössbauer spectroscopy reveals a rather unique behavior that displays thermally induced spin crossover (SCO) with two well-separated steps at 250 (gradual transition) 142 K (steep transition). Single crystal X-ray structures were 294, 150,...
The insertion of a [Fe(sal2-trien)]+ complex cation into 2D oxalate network in the presence different solvents results family hybrid magnets with coexistence magnetic ordering and photoinduced spin-crossover (LIESST effect) compounds [FeIII(sal2-trien)][MnIICrIII(ox)3]·CHCl3 (1·CHCl3), [FeIII(sal2-trien)][MnIICrIII(ox)3]·CHBr3 (1·CHBr3), [FeIII(sal2-trien)][MnIICrIII(ox)3]·CH2Br2 (1·CH2Br2). three crystallize honeycomb anionic layer formed by MnII CrIII ions linked through ligands complexes...
A highly stable Metal–Organic Framework with a hierarchical structure based on the Fe<sub>3</sub>O cluster and TTF-based ligand is presented.
Bond breaking has emerged as a new tool to postsynthetically modify the pore structure in metal-organic frameworks since it allows us obtain environments structures that are inaccessible by other techniques. Here, we extend concept of clip-off chemistry archetypical ZIF-8, taking advantage different stabilities bonds between imidazolate and Zn Fe metal atoms heterometallic Fe-Zn-ZIF-8. We demonstrate centers can be removed selectively without affecting backbone is supported atoms. This...
Two ultramicroporous 2D and 3D iron-based Metal-Organic Frameworks (MOFs) have been obtained by solvothermal synthesis using different ratios concentrations of precursors. Their reduced pore space decorated with pendant pyridine from tangling isonicotinic ligands enables the combination size-exclusion kinetic gas separation, due to their small pores, thermodynamic resulting interaction linker CO2 molecules. This combined separation results in efficient materials for dynamic breakthrough...
This study aimed to develop multifunctional nanoplatforms for both cancer imaging and therapy using superparamagnetic iron oxide nanoparticles (SPIONs). Two distinct synthetic methods, reduction–precipitation (MR/P) co-precipitation at controlled pH (MpH), were explored, including the assessment of coating’s influence, namely dextran gold, on their magnetic properties. These SPIONs further functionalized with gadolinium act as dual T1/T2 contrast agents resonance (MRI). Parameters such size,...
<title>Abstract</title> Glasses are ubiquitous in our everyday lives but still pose fundamental questions about the nature of order solids. Typically formed by rapid cooling a liquid, these amorphous solids have broad applications, with vitreous silica (SiO2) most well-known example.1 Most functional glasses purely inorganic solids, restricting range properties feasible.2 Recently, number new metal-organic framework (MOF) containing molecular components has been discovered heating their...
Iron-based nanoparticles have emerged as promising candidates for diverse biomedical applications, including cell separation, targeted drug delivery, hyperthermia therapy, and magnetic resonance imaging. This study reports the scalable synthesis of high-magnetization iron-based with controlled anisotropic shapes, achieved via a two-step process. Hematite nanoparticles, featuring nanocube, nanoellipse, nanoneedle morphologies, were synthesized through hydrolysis ferric chloride in presence...
Ba1−xSrxFe12O19 (x = 0.0, 0.5 and 1.0) hard-magnetic nanohexaferrites prepared by autocombustion were primarily investigated using Mössbauer spectroscopy optical studies. Morphological examination electron scanning microscopy revealed that the particles agglomerated into grains with a hexagonal shape. The grain size increases amount of Sr content, from ca. 490 nm 0.0) to 700 1.0). Room-temperature showed mean hyperfine field increased substitution Ba2+ Sr2+, consistent magnetization results....
We report the synthesis of a family ferrimagnetic NiFe layered double hydroxides (LDHs) with variable Ni(2+)/Fe(3+) in-plane composition [Ni(1-x)Fe(x)(OH)2](CO3)(x/2)·yH2O (x = 0.20, 0.25, and 0.33) by following modified homogeneous precipitation. These magnets display high crystallinity, hexagonal morphologies, micrometric size that enable their quantitative exfoliation into single layers sonomechanical treatment solids in polar solvents. This was confirmed dynamic light scattering, UV-vis...