A5057905123- X-ray Diffraction in Crystallography
- Crystallization and Solubility Studies
- Metal-Organic Frameworks: Synthesis and Applications
- Mesoporous Materials and Catalysis
- Polyoxometalates: Synthesis and Applications
- Physics of Superconductivity and Magnetism
- Synthesis and Characterization of Heterocyclic Compounds
- Magnetism in coordination complexes
- Catalytic Processes in Materials Science
- Advanced Battery Materials and Technologies
- Chemical Synthesis and Reactions
- Click Chemistry and Applications
- Covalent Organic Framework Applications
- Luminescence Properties of Advanced Materials
- biodegradable polymer synthesis and properties
- Multicomponent Synthesis of Heterocycles
- Dendrimers and Hyperbranched Polymers
- Extraction and Separation Processes
- Organometallic Complex Synthesis and Catalysis
- Advancements in Battery Materials
- Glass properties and applications
- Nanocluster Synthesis and Applications
- Conducting polymers and applications
- Nanomaterials for catalytic reactions
- Kidney Stones and Urolithiasis Treatments
Universidad Complutense de Madrid
2019-2023
Universidad Rey Juan Carlos
2015-2022
Universidade Federal do Espírito Santo
2002-2020
Instituto de Química y Fisicoquímica Biológicas
2018
The mechanism of apoptosis triggered by organotin- or titanocene-modified SBA-15 materials has been studied.
The carbon-carbon bond formation is essential to producing relevant organic compounds that exhibit pharmacological and biological properties. In this regard, Knoevenagel multicondensation reactions have been employed test the acid-base cooperativity of functionalized mesoporous silica nanoparticles with L-prolinate based groups (Prol-MSN) in comparison choline hydroxide fragments (Chol-MSN). Thus, Prol-MSN material has shown be a promising heterogeneous organocatalyst for condensation...
X-ray powder diffraction was used to study the phase composition of human renal calculi. The stones were collected from 56 donors in Vitória, Espírito Santo state, southeastern Brazil. An XRD quantification revealed that 61% studied composed exclusively calcium oxalate [34% formed only by monohydrate (COM) and 27% presents both dihydratate oxalate]. 39% multi-composed calculi have various other phases such as uric acid phosphate. Rietveld refinement data one apparent monophasic calculus...
The coordination environment of titanium the catalysts was investigated by DRUV–vis, Raman and <sup>47/49</sup>Ti MAS-NMR spectroscopies solid-state electrochemical techniques.
Mercury superconductor samples doped with rhenium, Hg0.82Re0.18Ba2Ca2Cu3O8+d, were produced in a very narrow range of oxygen content (d = 0.05, 0.10 and 0.15). The lattice parameters indicated slight change the unitary cell as function content. Furthermore, reduction volume was associated increment TC. measurements χac versus temperature, under external hydrostatic pressure, have shown sensitive results distinct In our opinion, this kind measurement may be used tool to determine (underdoped,...
The effect of the functionalization SBA-15 with titanocene derivatives and ionic liquids in biological processes has been tested by electrochemical techniques.
Mesoporous silica microspheres (MSMs) have been functionalized with triazole and pendant hydroxy moieties by a postsynthetic procedure. The functionalities prepared very efficient azide/alkyne click reaction propargyl alcohol to yield the corresponding 1,2,3‐triazole. subsequent cisplatin titanocene as metallic precursors produces platinum titanium complexes tethered onto surface. synthesized materials fully characterized dynamic recrystallization kinetics (DRX), FTIR, N 2...
Heterogeneous catalysts comprised of titanium immobilized on silica imidazolium-based systems have been synthesized for the ring opening polymerization ε-caprolactone.
Robust and non‐air‐sensitive metal‐free triazine‐triazole heterogeneous organocatalysts were prepared. The synthetic procedure involved the co‐condensation of a bridged tris silane precursor with tetraethyl orthosilicate (TEOS) in presence cetyltrimethylammonium bromide (CTAB). In addition, was anchored post‐synthesis onto mesoporous silica nanoparticles used to stabilize magnetic nanoparticles. characterized by X‐ray diffraction (XRD), fluorescence (XRF), N 2 adsorption‐desorption,...
Abstract Gadolinium oxysulfate doped with terbium (Gd 2 O SO 4 :Tb 3+ ; 0.1, 1.0, and 10.0 mol%) materials were obtained using thermal decomposition from sulfate hydrate under a dynamic air atmosphere between 1320–1400 K. The characterized Fourier transform infrared spectroscopy, thermogravimetric/derivative thermogravimetric investigations X‐ray powder diffraction patterns. Tb compound was at 1300 K used to compare stability photoluminescence behaviour that of Gd (0.1, mol%). Magnetic...
In this article, we report on the synthesis and characterization of tetracarboxylatodirhodium(II) complexes [Rh2(μ-O2CCH2OMe)4(THF)2] (1) [Rh2(μ-O2CC6H4-p-CMe3)4(OH2)2] (2) by metathesis reaction [Rh2(μ-O2CMe)4] with corresponding ligand acting also as solvent. The tetracarboxylato precursor, [Rh2(μ-O2CR)4], PPh4[Au(CN)2] at room temperature, yielded one-dimensional polymers (PPh4)n[Rh2(μ-O2CR)4Au(CN)2]n (R = Me (3), CH2OMe (4), CH2OEt (5)) non-polymeric compounds...
Herein, we describe the preparation of heteronuclear dirhodium-silver complexes by reaction between molecular Rh(II)-Rh(II) compounds [Rh₂(μ-O₂CR)₄L₂] (R = Me, Ph (1), CH₂OEt (2); L solvent molecules) with paddlewheel structure and PPh₄[Ag(CN)₂]. One-dimensional coordination polymers (PPh₄)n[Rh₂(μ-O₂CR)₄Ag(CN)₂]n Me (3), (4), (5)) formula have been obtained replacement two labile molecules in axial positions structures a [Ag(CN)₂]- bridging unit. The crystal 3⁻5 display similar arrangement,...
The synthesis, characterization and structural determination of four complexes with formula (PPh4)n[Rh2(µ–O2CPh)4Au(CN)2]n (1) Kn[Rh2(µ–O2CR)4M(CN)2]n (M = Au, R OEt (2), OMe (3); M Ag, (4)) are described. In all cases, the [CN-M-CN]– Ag) group is bridging axial positions dirhodium units giving one-dimensional chains. packing chains in solid state depends on nature carboxylate dimetallic unit, counterion present complex metal itself. most striking change observed...